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CVE-2026-64413

netfilter: ebtables: zero chainstack array

Products / packages Linux · Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AB0) · Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AC0) · 3 more

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Severity and exploitation

Not in CISA KEV

KEV coverage does not rule out exploitation.

KEV checked 15/11/2026, 01:40:32 UTC
Linux · CVSS:3.1 · 7
Assessment vectorCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Severity

high7.0

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

8 ranges
Linux version evidence

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

affected

1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 → before 2ade612967e2cdfb9290ebcb773f302c82f311fa

git versions

1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 → before 42bef500d07b5769d916e9122a3e3fa3fd2245ef

git versions

1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 → before fc7f105451044501a50cfd530cfa3b472c54acbc

git versions

1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 → before 9e6c5169db423e51dcc66a73fd15409c0d38e088

git versions

1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 → before 29bf41a9b59aff9f6197df58641a00037d567ca8

git versions

1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 → before 9f74d28e903fa4fdf82f870d0aeadddc8196e41c

git versions

1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 → before 5ee856e4208acafaaaf7b84824d39b78c21345d6

git versions

1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 → before cbfe53599eebffd188938ab6774cc41794f6f9d5

git 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

2.6.12

unaffected

0 → before 2.6.12

semver versions

5.10.261 → through 5.10.*

semver versions

5.15.212 → through 5.15.*

semver versions

6.1.178 → through 6.1.*

semver versions

6.6.145 → through 6.6.*

semver versions

6.12.97 → through 6.12.*

semver versions

6.18.39 → through 6.18.*

semver versions

7.1.4 → through 7.1.*

semver versions

7.2 → through *

original_commit_for_fix versions

unknown

Other versions: affected

Siemens · siemens-SADP

SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AB0)

1 range
siemens-SADP version evidence

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

affected

V3.1.6 → before *

custom versions

unaffected

unknown

Other versions: unknown

Siemens · siemens-SADP

SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AB0)

1 range
siemens-SADP version evidence

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

affected

V3.1.7 → before *

custom versions

unaffected

unknown

Other versions: unknown

Siemens · siemens-SADP

SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AC0)

1 range
siemens-SADP version evidence

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

affected

V3.1.6 → before *

custom versions

unaffected

unknown

Other versions: unknown

Siemens · siemens-SADP

SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AC0)

1 range
siemens-SADP version evidence

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

affected

V3.1.7 → before *

custom versions

unaffected

unknown

Other versions: unknown

Siemens · siemens-SADP

SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AB0)

1 range
siemens-SADP version evidence

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

affected

V3.1.6 → before *

custom versions

unaffected

unknown

Other versions: unknown

Siemens · siemens-SADP

SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AB0)

1 range
siemens-SADP version evidence

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

affected

V3.1.7 → before *

custom versions

unaffected

unknown

Other versions: unknown

Siemens · siemens-SADP

SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AC0)

1 range
siemens-SADP version evidence

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

affected

V3.1.6 → before *

custom versions

unaffected

unknown

Other versions: unknown

Siemens · siemens-SADP

SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AC0)

1 range
siemens-SADP version evidence

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

affected

V3.1.7 → before *

custom versions

unaffected

unknown

Other versions: unknown

Siemens · siemens-SADP

SIPLUS S7-1500 CPU 1518-4 PN/DP MFP (6AG1518-4AX00-4AC0)

1 range
siemens-SADP version evidence

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

affected

V3.1.6 → before *

custom versions

unaffected

unknown

Other versions: unknown

Siemens · siemens-SADP

SIPLUS S7-1500 CPU 1518-4 PN/DP MFP (6AG1518-4AX00-4AC0)

1 range
siemens-SADP version evidence

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

affected

V3.1.7 → before *

custom versions

unaffected

unknown

Other versions: unknown

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:

netfilter: ebtables: zero chainstack array

sashiko reports: looking at ebtables table translation, could a sparse cpu_possible_mask lead to an uninitialized pointer free?

If cpu_possible_mask is sparse (for example, CPU 0 and CPU 2 are possible, but CPU 1 is not), the allocation loop skips CPU 1. If vmalloc_node() fails at CPU 2, the cleanup loop will blindly decrement and call vfree() on newinfo->chainstack[1].

Not a real-world bug, such allocation isn't expected to fail in the first place.

References

10 sources
git.kernel.org/stable/c/2ade612967e2cdfb9290ebcb773f302c82f311fa
Source referenceLinux
git.kernel.org/stable/c/42bef500d07b5769d916e9122a3e3fa3fd2245ef
Source referenceLinux
git.kernel.org/stable/c/fc7f105451044501a50cfd530cfa3b472c54acbc
Source referenceLinux
git.kernel.org/stable/c/9e6c5169db423e51dcc66a73fd15409c0d38e088
Source referenceLinux
git.kernel.org/stable/c/29bf41a9b59aff9f6197df58641a00037d567ca8
Source referenceLinux
git.kernel.org/stable/c/9f74d28e903fa4fdf82f870d0aeadddc8196e41c
Source referenceLinux
View 4 more references
git.kernel.org/stable/c/5ee856e4208acafaaaf7b84824d39b78c21345d6
Source referenceLinux
git.kernel.org/stable/c/cbfe53599eebffd188938ab6774cc41794f6f9d5
Source referenceLinux
cert-portal.siemens.com/productcert/html/ssa-019113.html
Source referencesiemens-SADP
cert-portal.siemens.com/productcert/html/ssa-457936.html
Source referencesiemens-SADP

Inside the record

Evidence available

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

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

Original records

CVE-2026-64413

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

cve.new JSON →

Underlying weaknesses

The source’s classification of what caused the vulnerability.

CWE-457 ↗

CWE-457 Use of Uninitialized Variable

CISA-ADP

Related →

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): 2.6.12

Before: 5.10.261

Vulnerable product

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

From (inclusive): 2.6.12

Before: 5.15.212

Vulnerable product

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

From (inclusive): 2.6.12

Before: 6.1.178

Vulnerable product

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

From (inclusive): 2.6.12

Before: 6.6.145

Vulnerable product

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

From (inclusive): 2.6.12

Before: 6.12.97

Vulnerable product

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

From (inclusive): 2.6.12

Before: 6.18.39

Vulnerable product

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

From (inclusive): 2.6.12

Before: 7.1.4

Vulnerable product

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

From (inclusive): 2.6.12

Before: 7.2

Applicability preview
[
  {
    "nodes": [
      {
        "operator": "OR",
        "negate": false,
        "cpeMatch": [
          {
            "vulnerable": true,
            "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
            "versionStartIncluding": "2.6.12",
            "versionEndExcluding": "5.10.261"
          },
          {
            "vulnerable": true,
            "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
            "versionStartIncluding": "2.6.12",
            "versionEndExcluding": "5.15.212"
          },
          {
            "vulnerable": true,
            "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
            "versionStartIncluding": "2.6.12",
            "versionEndExcluding": "6.1.178"
          },
          {
            "vulnerable": true,
            "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
            "versionStartIncluding": "2.6.12",
            "versionEndExcluding": "6.6.145"
          },
          {
            "vulnerable": true,
            "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
            "versionStartIncluding": "2.6.12",
            "versionEndExcluding": "6.12.97"
          },
          {
            "vulnerable": true,
            "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
            "versionStartIncluding": "2.6.12",
            "versionEndExcluding": "6.18.39"
          },
          {
            "vulnerable": true,
            "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
            "versionStartIncluding": "2.6.12",
            "versionEndExcluding": "7.1.4"
          },
          {
            "vulnerable": true,
            "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
            "versionStartIncluding": "2.6.12",
            "versionEndExcluding": "7.2"
          }
        ]
      }
    ]
  }
]
Contributing organizations · 3
Linux

Assigning organization

2026-08-17
siemens-SADP

Additional data publisher

2026-11-10
CISA-ADP

Additional data publisher

2026-10-19

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.