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CVE-2026-99223

keys: make keyring indexes independent of kernel addresses

Products / packages Linux

Published

Share

Severity and exploitation

Not in CISA KEVNo CVSS score

KEV coverage does not rule out exploitation.

KEV checked 06/11/2026, 21:10:31 UTC

Severity

unknown

CVSS measures technical severity, not the likelihood of an attack.

Known exploitation

Not listed in the checked CISA KEV catalog

Absence from CISA KEV does not rule out attacks.

Public exploit

Not established by this record

Missing evidence does not mean no public exploit exists.

Remediation

Source guidance available

Review the recorded instructions. Guidance may be a workaround rather than a fixed version.

What this means

In the Linux kernel, the following vulnerability has been resolved:

Source excerpt · Linux

Attack conditions

No attack-condition excerpt has been identified here. Review the full source description and references for authentication, network access, and configuration requirements.

Review supporting sources →

Affected versions

Check the exact model, release, and any platform requirements against your installation.

Linux · Linux

Linux

9 ranges

Compare with this publisher’s ranges. This does not inspect your installation.

affected

b2a4df200d570b2c33a57e1ebfa5896e4bc81b69 → before 9ebe824d55983c9f063a2c9ef1a08b29812d406f

git versions

b2a4df200d570b2c33a57e1ebfa5896e4bc81b69 → before e108b22999edbc6f431466baf6b2016c19b7ed31

git versions

b2a4df200d570b2c33a57e1ebfa5896e4bc81b69 → before 9f084ef0beb68091e96ab96f0e95579aac8a77f9

git versions

b2a4df200d570b2c33a57e1ebfa5896e4bc81b69 → before 8451d4a4c43127c3b9fdf9fc9ff3fea5539a61f9

git versions

b2a4df200d570b2c33a57e1ebfa5896e4bc81b69 → before 13fc051269d670810d9e314061b61c6dd06116a0

git versions

b2a4df200d570b2c33a57e1ebfa5896e4bc81b69 → before 61ac0585d9f4344d3dfb84b5edff1fee7d532897

git versions

b2a4df200d570b2c33a57e1ebfa5896e4bc81b69 → before 84f7c699f8d139f743c7dc11ef41d085690955bb

git versions

b2a4df200d570b2c33a57e1ebfa5896e4bc81b69 → before a113eba06bd1183c614d7994864d6e7054140cb9

git versions

b2a4df200d570b2c33a57e1ebfa5896e4bc81b69 → before de891c73c1cf41ac8de12c07fa2c84d6a912ad0c

git versions

unaffected

unknown

Other versions: unaffected

Linux · Linux

Linux

11 ranges

Compare with this publisher’s ranges. This does not inspect your installation.

affected

3.13

unaffected

0 → before 3.13

semver versions

5.10.273 → through 5.10.*

semver versions

5.15.224 → through 5.15.*

semver versions

6.1.191 → through 6.1.*

semver versions

6.6.161 → through 6.6.*

semver versions

6.12.115 → through 6.12.*

semver versions

6.18.60 → through 6.18.*

semver versions

7.2.14 → through 7.2.*

semver versions

7.3.1 → through 7.3.*

semver versions

7.4-rc1 → through *

original_commit_for_fix versions

unknown

Other versions: affected

Automatic dependency matching is unavailable for this record. Use the product evidence and publisher’s instructions to check your installation.

What to do

Compare your installed product and version with the affected versions above. A matching product name alone does not confirm exposure.

Remove the addresses from the whole index, not just its first hash word.

Linux guidance ↗

cve.new guidance unless attributed to a publisher. This page does not inspect your installation.

Public exploit evidence

No public exploit reference is identified in the imported evidence. This is not a claim that no exploit exists.

Original source description

Read the full publisher description

In the Linux kernel, the following vulnerability has been resolved:

keys: make keyring indexes independent of kernel addresses

KEYCTL_READ returns the serial numbers in a keyring in associative-array traversal order. The first word of the index is a public, deterministic hash of the type pointer, domain pointer and description. An unprivileged user can therefore insert keys with known descriptions, predict their order for each possible KASLR slide, and recover the kernel image address. On an x86-64 build with 16 MiB alignment, 45 user keys suffice to distinguish the candidate slides.

Remove the addresses from the whole index, not just its first hash word. Assign each key type and domain a nonzero 64-bit ID and hash those IDs and the description with a once-initialized SipHash key. Use the full IDs in the later index chunks as well. Truncating or hashing the IDs there would lose the guarantee that distinct type/domain/description tuples have a differing index bit.

Allocate IDs lazily since private key types need not be registered. Cache them in the index key so tree walks and copies of an existing index do not need to dereference a type descriptor that may have been unregistered. Keep the 32-bit chunk layout and diff_objects() bit offsets consistent, and retain the separate root slot for keyrings used by recursive search. The key comparison, permissions and userspace data format are unchanged; only the address-dependent in-memory ordering is replaced.

References

9 sources

Inside the record

Evidence available

Package identity · not supplied
Version evidence
Remediation guidance · not supplied
Weakness classification · not supplied
Additional publishers · not supplied

Describes the evidence in this view, not whether the product is safe.

Original records

CVE-2026-99223

View the latest unmodified CVE JSON from the official source. It may be newer than this imported page.

cve.new JSON →

Environment requirements

These conditions apply together as specified by the publisher. A matching product name alone does not establish exposure.

Linux · platform conditions

Any condition may hold

Vulnerable product

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

From (inclusive): 3.13

Before: 5.10.273

Vulnerable product

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

From (inclusive): 3.13

Before: 5.15.224

Vulnerable product

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

From (inclusive): 3.13

Before: 6.1.191

Vulnerable product

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

From (inclusive): 3.13

Before: 6.6.161

Vulnerable product

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

From (inclusive): 3.13

Before: 6.12.115

Vulnerable product

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

From (inclusive): 3.13

Before: 6.18.60

Vulnerable product

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

From (inclusive): 3.13

Before: 7.2.14

Vulnerable product

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

From (inclusive): 3.13

Before: 7.3.1

Vulnerable product

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

From (inclusive): 3.13

Before: 7.4-rc1

Original applicability statements
[
  {
    "nodes": [
      {
        "operator": "OR",
        "negate": false,
        "cpeMatch": [
          {
            "vulnerable": true,
            "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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          },
          {
            "vulnerable": true,
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          {
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          },
          {
            "vulnerable": true,
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            "versionEndExcluding": "7.3.1"
          },
          {
            "vulnerable": true,
            "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
            "versionStartIncluding": "3.13",
            "versionEndExcluding": "7.4-rc1"
          }
        ]
      }
    ]
  }
]
Contributing organizations · 1
Linux

Assigning organization

2026-11-03

Timeline

All times UTC
  1. Advisory published

    Publication date supplied by the source.

  2. Source updated

    Latest modification date supplied by the source.

  3. Last imported by cve.new

    Latest catalog import, not the date we first saw this advisory.

What changed

Follow changes
  1. CVE · CVE-2026-99223

    Observed 2026-11-03T19:50:16.764Z · upstream updated 2026-11-03T19:12:57.119Z

    Product or version evidence changed

    before

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            "versionType": "git"
          },
          {
            "version": "b2a4df200d570b2c33a57e1ebfa5896e4bc81b69",
            "status": "affected",
            "lessThan": "e108b22999edbc6f431466baf6b2016c19b7ed31",
            "versionType": "git"
          },
          {
            "version": "b2a4df200d570b2c33a57e1ebfa5896e4bc81b69",
            "status": "affected",
            "lessThan": "9f084ef0beb68091e96ab96f0e95579aac8a77f9",
            "versionType": "git"
          },
          {
            "version": "b2a4df200d570b2c33a57e1ebfa5896e4bc81b69",
            "status": "affected",
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            "versionType": "git"
          },
          {
            "version": "b2a4df200d570b2c33a57e1ebfa5896e4bc81b69",
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            "lessThan": "13fc051269d670810d9e314061b61c6dd06116a0",
            "versionType": "git"
          },
          {
            "version": "b2a4df200d570b2c33a57e1ebfa5896e4bc81b69",
            "status": "affected",
            "lessThan": "61ac0585d9f4344d3dfb84b5edff1fee7d532897",
            "versionType": "git"
          },
          {
            "version": "b2a4df200d570b2c33a57e1ebfa5896e4bc81b69",
            "status": "affected",
            "lessThan": "84f7c699f8d139f743c7dc11ef41d085690955bb",
            "versionType": "git"
          },
          {
            "version": "b2a4df200d570b2c33a57e1ebfa5896e4bc81b69",
            "status": "affected",
            "lessThan": "a113eba06bd1183c614d7994864d6e7054140cb9",
            "versionType": "git"
          }
        ],
        "defaultStatus": "unaffected",
        "cpes": [],
        "source": "Linux",
        "url": "https://www.cve.org/CVERecord?id=CVE-2026-99223"
      },
      {
        "vendor": "Linux",
        "name": "Linux",
        "platforms": [],
        "versions": [
          {
            "version": "3.13",
            "status": "affected"
          },
          {
            "version": "0",
            "status": "unaffected",
            "lessThan": "3.13",
            "versionType": "semver"
          },
          {
            "version": "5.10.273",
            "status": "unaffected",
            "lessThanOrEqual": "5.10.*",
            "versionType": "semver"
          },
          {
            "version": "5.15.224",
            "status": "unaffected",
            "lessThanOrEqual": "5.15.*",
            "versionType": "semver"
          },
          {
            "version": "6.1.191",
            "status": "unaffected",
            "lessThanOrEqual": "6.1.*",
            "versionType": "semver"
          },
          {
            "version": "6.6.161",
            "status": "unaffected",
            "lessThanOrEqual": "6.6.*",
            "versionType": "semver"
          },
          {
            "version": "6.12.115",
            "status": "unaffected",
            "lessThanOrEqual": "6.12.*",
            "versionType": "semver"
          },
          {
            "version": "6.18.60",
            "status": "unaffected",
            "lessThanOrEqual": "6.18.*",
            "versionType": "semver"
          },
          {
            "version": "7.2.14",
            "status": "unaffected",
            "lessThanOrEqual": "7.2.*",
            "versionType": "semver"
          },
          {
            "version": "7.3.1",
            "status": "unaffected",
            "lessThanOrEqual": "7.3.*",
            "versionType": "semver"
          }
        ],
        "defaultStatus": "affected",
        "cpes": [],
        "source": "Linux",
        "url": "https://www.cve.org/CVERecord?id=CVE-2026-99223"
      }
    ]

    after

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        "name": "Linux",
        "platforms": [],
        "versions": [
          {
            "version": "b2a4df200d570b2c33a57e1ebfa5896e4bc81b69",
            "status": "affected",
            "lessThan": "9ebe824d55983c9f063a2c9ef1a08b29812d406f",
            "versionType": "git"
          },
          {
            "version": "b2a4df200d570b2c33a57e1ebfa5896e4bc81b69",
            "status": "affected",
            "lessThan": "e108b22999edbc6f431466baf6b2016c19b7ed31",
            "versionType": "git"
          },
          {
            "version": "b2a4df200d570b2c33a57e1ebfa5896e4bc81b69",
            "status": "affected",
            "lessThan": "9f084ef0beb68091e96ab96f0e95579aac8a77f9",
            "versionType": "git"
          },
          {
            "version": "b2a4df200d570b2c33a57e1ebfa5896e4bc81b69",
            "status": "affected",
            "lessThan": "8451d4a4c43127c3b9fdf9fc9ff3fea5539a61f9",
            "versionType": "git"
          },
          {
            "version": "b2a4df200d570b2c33a57e1ebfa5896e4bc81b69",
            "status": "affected",
            "lessThan": "13fc051269d670810d9e314061b61c6dd06116a0",
            "versionType": "git"
          },
          {
            "version": "b2a4df200d570b2c33a57e1ebfa5896e4bc81b69",
            "status": "affected",
            "lessThan": "61ac0585d9f4344d3dfb84b5edff1fee7d532897",
            "versionType": "git"
          },
          {
            "version": "b2a4df200d570b2c33a57e1ebfa5896e4bc81b69",
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            "versionType": "git"
          },
          {
            "version": "b2a4df200d570b2c33a57e1ebfa5896e4bc81b69",
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            "versionType": "git"
          },
          {
            "version": "b2a4df200d570b2c33a57e1ebfa5896e4bc81b69",
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            "lessThan": "de891c73c1cf41ac8de12c07fa2c84d6a912ad0c",
            "versionType": "git"
          }
        ],
        "defaultStatus": "unaffected",
        "cpes": [],
        "source": "Linux",
        "url": "https://www.cve.org/CVERecord?id=CVE-2026-99223"
      },
      {
        "vendor": "Linux",
        "name": "Linux",
        "platforms": [],
        "versions": [
          {
            "version": "3.13",
            "status": "affected"
          },
          {
            "version": "0",
            "status": "unaffected",
            "lessThan": "3.13",
            "versionType": "semver"
          },
          {
            "version": "5.10.273",
            "status": "unaffected",
            "lessThanOrEqual": "5.10.*",
            "versionType": "semver"
          },
          {
            "version": "5.15.224",
            "status": "unaffected",
            "lessThanOrEqual": "5.15.*",
            "versionType": "semver"
          },
          {
            "version": "6.1.191",
            "status": "unaffected",
            "lessThanOrEqual": "6.1.*",
            "versionType": "semver"
          },
          {
            "version": "6.6.161",
            "status": "unaffected",
            "lessThanOrEqual": "6.6.*",
            "versionType": "semver"
          },
          {
            "version": "6.12.115",
            "status": "unaffected",
            "lessThanOrEqual": "6.12.*",
            "versionType": "semver"
          },
          {
            "version": "6.18.60",
            "status": "unaffected",
            "lessThanOrEqual": "6.18.*",
            "versionType": "semver"
          },
          {
            "version": "7.2.14",
            "status": "unaffected",
            "lessThanOrEqual": "7.2.*",
            "versionType": "semver"
          },
          {
            "version": "7.3.1",
            "status": "unaffected",
            "lessThanOrEqual": "7.3.*",
            "versionType": "semver"
          },
          {
            "version": "7.4-rc1",
            "status": "unaffected",
            "lessThanOrEqual": "*",
            "versionType": "original_commit_for_fix"
          }
        ],
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      }
    ]
    References changed

    before

    [
      "https://git.kernel.org/stable/c/9ebe824d55983c9f063a2c9ef1a08b29812d406f",
      "https://git.kernel.org/stable/c/e108b22999edbc6f431466baf6b2016c19b7ed31",
      "https://git.kernel.org/stable/c/9f084ef0beb68091e96ab96f0e95579aac8a77f9",
      "https://git.kernel.org/stable/c/8451d4a4c43127c3b9fdf9fc9ff3fea5539a61f9",
      "https://git.kernel.org/stable/c/13fc051269d670810d9e314061b61c6dd06116a0",
      "https://git.kernel.org/stable/c/61ac0585d9f4344d3dfb84b5edff1fee7d532897",
      "https://git.kernel.org/stable/c/84f7c699f8d139f743c7dc11ef41d085690955bb",
      "https://git.kernel.org/stable/c/a113eba06bd1183c614d7994864d6e7054140cb9"
    ]

    after

    [
      "https://git.kernel.org/stable/c/9ebe824d55983c9f063a2c9ef1a08b29812d406f",
      "https://git.kernel.org/stable/c/e108b22999edbc6f431466baf6b2016c19b7ed31",
      "https://git.kernel.org/stable/c/9f084ef0beb68091e96ab96f0e95579aac8a77f9",
      "https://git.kernel.org/stable/c/8451d4a4c43127c3b9fdf9fc9ff3fea5539a61f9",
      "https://git.kernel.org/stable/c/13fc051269d670810d9e314061b61c6dd06116a0",
      "https://git.kernel.org/stable/c/61ac0585d9f4344d3dfb84b5edff1fee7d532897",
      "https://git.kernel.org/stable/c/84f7c699f8d139f743c7dc11ef41d085690955bb",
      "https://git.kernel.org/stable/c/a113eba06bd1183c614d7994864d6e7054140cb9",
      "https://git.kernel.org/stable/c/de891c73c1cf41ac8de12c07fa2c84d6a912ad0c"
    ]
    Environment requirements changed

    before

    [
      {
        "source": "Linux",
        "statements": [
          {
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                "operator": "OR",
                "negate": false,
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                    "versionEndExcluding": "5.10.273"
                  },
                  {
                    "vulnerable": true,
                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                    "versionStartIncluding": "3.13",
                    "versionEndExcluding": "5.15.224"
                  },
                  {
                    "vulnerable": true,
                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                    "versionStartIncluding": "3.13",
                    "versionEndExcluding": "6.1.191"
                  },
                  {
                    "vulnerable": true,
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                    "versionStartIncluding": "3.13",
                    "versionEndExcluding": "6.6.161"
                  },
                  {
                    "vulnerable": true,
                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                    "versionStartIncluding": "3.13",
                    "versionEndExcluding": "6.12.115"
                  },
                  {
                    "vulnerable": true,
                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                    "versionStartIncluding": "3.13",
                    "versionEndExcluding": "6.18.60"
                  },
                  {
                    "vulnerable": true,
                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                  },
                  {
                    "vulnerable": true,
                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                ]
              }
            ]
          }
        ]
      }
    ]

    after

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          {
            "nodes": [
              {
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                "negate": false,
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                    "versionStartIncluding": "3.13",
                    "versionEndExcluding": "5.10.273"
                  },
                  {
                    "vulnerable": true,
                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                    "versionStartIncluding": "3.13",
                    "versionEndExcluding": "5.15.224"
                  },
                  {
                    "vulnerable": true,
                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                  },
                  {
                    "vulnerable": true,
                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                    "versionStartIncluding": "3.13",
                    "versionEndExcluding": "6.6.161"
                  },
                  {
                    "vulnerable": true,
                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                    "versionStartIncluding": "3.13",
                    "versionEndExcluding": "6.12.115"
                  },
                  {
                    "vulnerable": true,
                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                    "versionStartIncluding": "3.13",
                    "versionEndExcluding": "6.18.60"
                  },
                  {
                    "vulnerable": true,
                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                    "versionStartIncluding": "3.13",
                    "versionEndExcluding": "7.2.14"
                  },
                  {
                    "vulnerable": true,
                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                    "versionStartIncluding": "3.13",
                    "versionEndExcluding": "7.3.1"
                  },
                  {
                    "vulnerable": true,
                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                    "versionStartIncluding": "3.13",
                    "versionEndExcluding": "7.4-rc1"
                  }
                ]
              }
            ]
          }
        ]
      }
    ]

Large field values are marked as truncated previews. Original source snapshots remain retained.

Showing up to 50 most recent observed changes.