CVE-2026-64413netfilter: ebtables: zero chainstack array
- 7.0HighCVSS base score
- 0.13%Exploitation in 30 daysEPSS · top 98% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
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.
Timeline
ID reserved
By Linux
- 6 days later
· 6 days later
Published
- 4 months later
· 4 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| LinuxCNA (assigner) | 3.1 | High7.0 | CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Modified | 3.1 | High7.0 | CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.13% · top 98% of all CVEs (13 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: total
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.0.
Affected products
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < 2ade612967e2cdfb9290ebcb773f302c82f311fa
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < 42bef500d07b5769d916e9122a3e3fa3fd2245ef
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < fc7f105451044501a50cfd530cfa3b472c54acbc
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < 9e6c5169db423e51dcc66a73fd15409c0d38e088
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < 29bf41a9b59aff9f6197df58641a00037d567ca8
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < 9f74d28e903fa4fdf82f870d0aeadddc8196e41c
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < 5ee856e4208acafaaaf7b84824d39b78c21345d6
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < cbfe53599eebffd188938ab6774cc41794f6f9d5
- affected 2.6.12
- unaffected < 2.6.12
- unaffected 5.10.261 – ≤ 5.10.*
- unaffected 5.15.212 – ≤ 5.15.*
- unaffected 6.1.178 – ≤ 6.1.*
- unaffected 6.6.145 – ≤ 6.6.*
- unaffected 6.12.97 – ≤ 6.12.*
- unaffected 6.18.39 – ≤ 6.18.*
- unaffected 7.1.4 – ≤ 7.1.*
- unaffected 7.2 – ≤ *
References
References10
- https://git.kernel.org/stable/c/2ade612967e2cdfb9290ebcb773f302c82f311fa (opens in a new tab)
- https://git.kernel.org/stable/c/42bef500d07b5769d916e9122a3e3fa3fd2245ef (opens in a new tab)
- https://git.kernel.org/stable/c/fc7f105451044501a50cfd530cfa3b472c54acbc (opens in a new tab)
- https://git.kernel.org/stable/c/9e6c5169db423e51dcc66a73fd15409c0d38e088 (opens in a new tab)
- https://git.kernel.org/stable/c/29bf41a9b59aff9f6197df58641a00037d567ca8 (opens in a new tab)
- https://git.kernel.org/stable/c/9f74d28e903fa4fdf82f870d0aeadddc8196e41c (opens in a new tab)
- https://git.kernel.org/stable/c/5ee856e4208acafaaaf7b84824d39b78c21345d6 (opens in a new tab)
- https://git.kernel.org/stable/c/cbfe53599eebffd188938ab6774cc41794f6f9d5 (opens in a new tab)
- https://cert-portal.siemens.com/productcert/html/ssa-019113.html (opens in a new tab)
- https://cert-portal.siemens.com/productcert/html/ssa-457936.html (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-48957 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-64413)Record last updated .