CVE-2026-72252netfilter: nft_set_pipapo: don't leak bad clone into future transaction
- 7.8HighCVSS base score
- 0.17%Exploitation in 30 daysEPSS · top 94% 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: nft_set_pipapo: don't leak bad clone into future transaction On memory allocation failure the cloned nft_pipapo_match can enter a bad state: - some fields can have their lookup tables resized while others did not - bits might have been toggled - scratch map can be undersized which also means m->bsize_max can be lower than what is required This means that the next insertion in the same batch can trigger out-of-bounds writes. Furthermore, a failure in the first can result in the bad clone to leak into the next transaction because the abort callback is never executed in this case (the upper layer saw an error and no attempt to allocate a transactional request was made). Record a state for the nft_pipapo_match structure: - NEW (pristine clone) - MOD (modified clone with good state) - ERR (potentially bogus content) Then make it so that deletes and insertions fail when the clone entered ERR state. In case the very first insert attempt results in an error, free the clone right away.
Timeline
ID reserved
By Linux
- 6 days later
· 6 days later
Published
- 2 months later
· 2 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 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Received | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.17% · top 94% of all CVEs (15 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 7.8.
Affected products
- affected 3c4287f62044a90e73a561aa05fc46e62da173da – < 0ab7b1802f63ca5b288ea59acb467830b83abd6b
- affected 3c4287f62044a90e73a561aa05fc46e62da173da – < cc53703f48558896295f565cd4f5e956d21b7af4
- affected 3c4287f62044a90e73a561aa05fc46e62da173da – < 047e813324eac2ac60cddfb58bcdbd0144eadb09
- affected 3c4287f62044a90e73a561aa05fc46e62da173da – < 610e3b73efaec3dd81a95dcda2421ad7d9795bd0
- affected 3c4287f62044a90e73a561aa05fc46e62da173da – < 02b6b0e892aea582590671796fd6eff5b93ea93f
- affected 3c4287f62044a90e73a561aa05fc46e62da173da – < e74f9680e1b64872a51cc7b5bda1edaaa08aa51f
- affected 3c4287f62044a90e73a561aa05fc46e62da173da – < 47e65eff50691f0a5b79d325e28d83ec1da43bcf
- affected 5.6
- unaffected < 5.6
- unaffected 5.15.217 – ≤ 5.15.*
- unaffected 6.1.184 – ≤ 6.1.*
- unaffected 6.6.148 – ≤ 6.6.*
- unaffected 6.12.97 – ≤ 6.12.*
- unaffected 6.18.40 – ≤ 6.18.*
- unaffected 7.1.5 – ≤ 7.1.*
- unaffected 7.2 – ≤ *
References
References7
- https://git.kernel.org/stable/c/0ab7b1802f63ca5b288ea59acb467830b83abd6b (opens in a new tab)
- https://git.kernel.org/stable/c/cc53703f48558896295f565cd4f5e956d21b7af4 (opens in a new tab)
- https://git.kernel.org/stable/c/047e813324eac2ac60cddfb58bcdbd0144eadb09 (opens in a new tab)
- https://git.kernel.org/stable/c/610e3b73efaec3dd81a95dcda2421ad7d9795bd0 (opens in a new tab)
- https://git.kernel.org/stable/c/02b6b0e892aea582590671796fd6eff5b93ea93f (opens in a new tab)
- https://git.kernel.org/stable/c/e74f9680e1b64872a51cc7b5bda1edaaa08aa51f (opens in a new tab)
- https://git.kernel.org/stable/c/47e65eff50691f0a5b79d325e28d83ec1da43bcf (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-2026-59151 (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-2026-72252)Record last updated .