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CVE-2026-98716

KVM: SVM: Use the active VMCB's MSR bitmap when checking if MSR is intercepted

Products / packages Linux

Published

Share

Severity and exploitation

Not in CISA KEVNo CVSS score

KEV coverage does not rule out exploitation.

KEV checked 14/11/2026, 21:10:34 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

Fix status not established

No structured fix or guidance is available here. Check the latest publisher advisory.

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

12 ranges
Linux version evidence

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

affected

b2ac58f90540e39324e7a29a7ad471407ae0bf48 → before 001c78bc64389cabe4f9015ab3942ec9c3592caa

git versions

b2ac58f90540e39324e7a29a7ad471407ae0bf48 → before 552a110c403f1a61eba0bf71519c6585d9d4242d

git versions

b2ac58f90540e39324e7a29a7ad471407ae0bf48 → before 0e79ebf6f92a7d15187aede44204fa04b93e474c

git versions

b2ac58f90540e39324e7a29a7ad471407ae0bf48 → before 84da7a0e92207444d9cbfe69965e17db29008f27

git versions

b2ac58f90540e39324e7a29a7ad471407ae0bf48 → before 74836ae4785b9754bb36d0b18fcc1dec4e5e98d2

git versions

b2ac58f90540e39324e7a29a7ad471407ae0bf48 → before 318ef696fa3c712e46bb62a1a828c3cd62f390c3

git versions

b2ac58f90540e39324e7a29a7ad471407ae0bf48 → before 55865b3ae03705aa39198783b9cb1f8b96eb44e4

git versions

b2ac58f90540e39324e7a29a7ad471407ae0bf48 → before 9e06bbb9ade7cdf28d4a3b5b14e5812881c8df85

git versions

f54d0bb8487d2f016fbc4f0e38ef9098f8eb8bd4

git versions

89be8950bab799ddb9cc3777345e3c21bcb32dba

git versions

3.16.57 → before 3.17

semver versions

4.4.168 → before 4.5

semver versions

unaffected

unknown

Other versions: unaffected

Linux · Linux

Linux

10 ranges
Linux version evidence

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

affected

4.16

unaffected

0 → before 4.16

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

6.6.160 → through 6.6.*

semver versions

6.12.113 → through 6.12.*

semver versions

6.18.56 → through 6.18.*

semver versions

7.2.10 → through 7.2.*

semver versions

7.3 → 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.

No structured fix or remediation guidance is available here. Check the full source description and vendor’s latest advisory for a patch or workaround; do not assume another version is safe.

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:

KVM: SVM: Use the active VMCB's MSR bitmap when checking if MSR is intercepted

Use the MSR permission bitmap of the active VMCB instead of assuming that KVM is always using vmcb02's bitmap when L2 is active, as KVM uses msrpm02 if and only if L1 wants to intercept MSR accesses, i.e. if and only if KVM needs to merge msprm01 with msrpm12.

Don't bother tracking the virtual address of the bitmap that's being used, as __va() is cheap on x86, and caching the virtual address would introduce yet another source of potentially stale information.

References

8 sources
git.kernel.org/stable/c/001c78bc64389cabe4f9015ab3942ec9c3592caa
Source referenceLinux
git.kernel.org/stable/c/552a110c403f1a61eba0bf71519c6585d9d4242d
Source referenceLinux
git.kernel.org/stable/c/0e79ebf6f92a7d15187aede44204fa04b93e474c
Source referenceLinux
git.kernel.org/stable/c/84da7a0e92207444d9cbfe69965e17db29008f27
Source referenceLinux
git.kernel.org/stable/c/74836ae4785b9754bb36d0b18fcc1dec4e5e98d2
Source referenceLinux
git.kernel.org/stable/c/318ef696fa3c712e46bb62a1a828c3cd62f390c3
Source referenceLinux
View 2 more references
git.kernel.org/stable/c/55865b3ae03705aa39198783b9cb1f8b96eb44e4
Source referenceLinux
git.kernel.org/stable/c/9e06bbb9ade7cdf28d4a3b5b14e5812881c8df85
Source referenceLinux

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-2026-98716

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): 4.16

Before: 5.10.273

Vulnerable product

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

From (inclusive): 4.16

Before: 5.15.224

Vulnerable product

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

From (inclusive): 4.16

Before: 6.1.191

Vulnerable product

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

From (inclusive): 4.16

Before: 6.6.160

Vulnerable product

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

From (inclusive): 4.16

Before: 6.12.113

Vulnerable product

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

From (inclusive): 4.16

Before: 6.18.56

Vulnerable product

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

From (inclusive): 4.16

Before: 7.2.10

Vulnerable product

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

From (inclusive): 4.16

Before: 7.3

Vulnerable product

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

From (inclusive): 3.16.57

Vulnerable product

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

From (inclusive): 4.4.168

Applicability preview
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  {
    "nodes": [
      {
        "operator": "OR",
        "negate": false,
        "cpeMatch": [
          {
            "vulnerable": true,
            "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
            "versionStartIncluding": "4.16",
            "versionEndExcluding": "5.10.273"
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          {
            "vulnerable": true,
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          {
            "vulnerable": true,
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            "versionStartIncluding": "4.16",
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          {
            "vulnerable": true,
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            "versionStartIncluding": "4.16",
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          {
            "vulnerable": true,
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          {
            "vulnerable": true,
            "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
            "versionStartIncluding": "3.16.57"
          },
          {
            "vulnerable": true,
            "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
            "versionStartIncluding": "4.4.168"
          }
        ]
      }
    ]
  }
]
Contributing organizations · 1
Linux

Assigning organization

2026-10-30

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
No substantive changes have been recorded here yet. History starts when cve.new observes a change after tracking is enabled; earlier edits are not reconstructed.

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