netfilter: nft_set_pipapo: don't leak bad clone into future transaction

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-72252
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-15 06:21:52 UTC
Updated2026-08-23 13:16:42 UTC
DescriptionIn 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.

Risk And Classification

Primary CVSS: v3.1 7.8 HIGH from 416baaa9-dc9f-4396-8d5f-8c081fb06d67

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS: 0.001630000 probability, percentile 0.060320000 (date 2026-08-17)

VersionSourceTypeScoreSeverityVector
3.1416baaa9-dc9f-4396-8d5f-8c081fb06d67Secondary7.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
3.1CNADECLARED7.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 3c4287f62044a90e73a561aa05fc46e62da173da 0ab7b1802f63ca5b288ea59acb467830b83abd6b git Not specified
CNA Linux Linux affected 3c4287f62044a90e73a561aa05fc46e62da173da cc53703f48558896295f565cd4f5e956d21b7af4 git Not specified
CNA Linux Linux affected 3c4287f62044a90e73a561aa05fc46e62da173da 047e813324eac2ac60cddfb58bcdbd0144eadb09 git Not specified
CNA Linux Linux affected 3c4287f62044a90e73a561aa05fc46e62da173da 610e3b73efaec3dd81a95dcda2421ad7d9795bd0 git Not specified
CNA Linux Linux affected 3c4287f62044a90e73a561aa05fc46e62da173da 02b6b0e892aea582590671796fd6eff5b93ea93f git Not specified
CNA Linux Linux affected 3c4287f62044a90e73a561aa05fc46e62da173da e74f9680e1b64872a51cc7b5bda1edaaa08aa51f git Not specified
CNA Linux Linux affected 3c4287f62044a90e73a561aa05fc46e62da173da 47e65eff50691f0a5b79d325e28d83ec1da43bcf git Not specified
CNA Linux Linux affected 5.6 Not specified
CNA Linux Linux unaffected 5.6 semver Not specified
CNA Linux Linux unaffected 5.15.217 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.184 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.148 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.97 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.40 6.18.* semver Not specified
CNA Linux Linux unaffected 7.1.5 7.1.* semver Not specified
CNA Linux Linux unaffected 7.2 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/610e3b73efaec3dd81a95dcda2421ad7d9795bd0 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/047e813324eac2ac60cddfb58bcdbd0144eadb09 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/e74f9680e1b64872a51cc7b5bda1edaaa08aa51f 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/47e65eff50691f0a5b79d325e28d83ec1da43bcf 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/cc53703f48558896295f565cd4f5e956d21b7af4 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/02b6b0e892aea582590671796fd6eff5b93ea93f 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/0ab7b1802f63ca5b288ea59acb467830b83abd6b 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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