batman-adv: avoid OGM aggregation when skb tailroom is insufficient

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Summary

CVECVE-2026-31683
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-04-25 09:16:02 UTC
Updated2026-05-06 21:14:05 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: batman-adv: avoid OGM aggregation when skb tailroom is insufficient When OGM aggregation state is toggled at runtime, an existing forwarded packet may have been allocated with only packet_len bytes, while a later packet can still be selected for aggregation. Appending in this case can hit skb_put overflow conditions. Reject aggregation when the target skb tailroom cannot accommodate the new packet. The caller then falls back to creating a new forward packet instead of appending.

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: 0.000240000 probability, percentile 0.067850000 (date 2026-04-27)

Problem Types: NVD-CWE-noinfo

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

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Linux Linux Kernel All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected c6c8fea29769d998d94fcec9b9f14d4b52b349d3 67176c96f325837b0bb3e9538ca2eba414f447d8 git Not specified
CNA Linux Linux affected c6c8fea29769d998d94fcec9b9f14d4b52b349d3 0b10a8b355c3f71012ce89289ec2c2f5e3bfd6c1 git Not specified
CNA Linux Linux affected c6c8fea29769d998d94fcec9b9f14d4b52b349d3 6755347c5f9bdd44dee80f692208b056fcd40a52 git Not specified
CNA Linux Linux affected c6c8fea29769d998d94fcec9b9f14d4b52b349d3 1ada20331f2df2a942d6b83ae1f04a304b642e2a git Not specified
CNA Linux Linux affected c6c8fea29769d998d94fcec9b9f14d4b52b349d3 6e40ebb999c2c3d2fbb3cacb61f0384ee6e69075 git Not specified
CNA Linux Linux affected c6c8fea29769d998d94fcec9b9f14d4b52b349d3 0e35db29fc5a97a8553f7c2d3a2ba730e46b1ee8 git Not specified
CNA Linux Linux affected c6c8fea29769d998d94fcec9b9f14d4b52b349d3 eda89a1bae0602aec8314ced299bb243b9f9aeef git Not specified
CNA Linux Linux affected c6c8fea29769d998d94fcec9b9f14d4b52b349d3 0d4aef630be9d5f9c1227d07669c26c4383b5ad0 git Not specified
CNA Linux Linux affected 2.6.38 Not specified
CNA Linux Linux unaffected 2.6.38 semver Not specified
CNA Linux Linux unaffected 5.10.253 5.10.* semver Not specified
CNA Linux Linux unaffected 5.15.203 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.167 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.130 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.78 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.20 6.18.* semver Not specified
CNA Linux Linux unaffected 6.19.10 6.19.* semver Not specified
CNA Linux Linux unaffected 7.0 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/6e40ebb999c2c3d2fbb3cacb61f0384ee6e69075 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/1ada20331f2df2a942d6b83ae1f04a304b642e2a 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/0b10a8b355c3f71012ce89289ec2c2f5e3bfd6c1 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/0e35db29fc5a97a8553f7c2d3a2ba730e46b1ee8 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/0d4aef630be9d5f9c1227d07669c26c4383b5ad0 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/eda89a1bae0602aec8314ced299bb243b9f9aeef 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/67176c96f325837b0bb3e9538ca2eba414f447d8 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/6755347c5f9bdd44dee80f692208b056fcd40a52 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
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