batman-adv: retrieve ethhdr after potential skb realloc on RX

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-72235
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-15 06:21:50 UTC
Updated2026-08-17 06:18:24 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: batman-adv: retrieve ethhdr after potential skb realloc on RX pskb_may_pull() in batadv_interface_rx() could reallocate the buffer behind the skb. Variables which were pointing to the old buffer need to be reassigned to avoid an use-after-free. This was done correctly for the VLAN header but missed for the ethernet header which is later used for the TT and AP isolation handling.

Risk And Classification

Primary CVSS: v3.1 8.8 HIGH from 416baaa9-dc9f-4396-8d5f-8c081fb06d67

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

EPSS: 0.003390000 probability, percentile 0.268710000 (date 2026-08-17)

VersionSourceTypeScoreSeverityVector
3.1416baaa9-dc9f-4396-8d5f-8c081fb06d67Secondary8.8HIGHCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
3.1CNADECLARED8.8HIGHCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

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

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected c6c8fea29769d998d94fcec9b9f14d4b52b349d3 6e189f14d1ea28db212b9d70a02131a7ce518012 git Not specified
CNA Linux Linux affected c6c8fea29769d998d94fcec9b9f14d4b52b349d3 a1820344b180cb55af748f102bc536b5c93164db git Not specified
CNA Linux Linux affected c6c8fea29769d998d94fcec9b9f14d4b52b349d3 6abf73589bed3f27ee240c08108feb72bed0b9c6 git Not specified
CNA Linux Linux affected c6c8fea29769d998d94fcec9b9f14d4b52b349d3 f19259395b44af67f3c274e34237c295b526b859 git Not specified
CNA Linux Linux affected c6c8fea29769d998d94fcec9b9f14d4b52b349d3 2cefa5141cab8ec1e4b24cf585958b13f2e3049d git Not specified
CNA Linux Linux affected c6c8fea29769d998d94fcec9b9f14d4b52b349d3 85a71a81854e0e191ad0e533eabb4eff54866feb git Not specified
CNA Linux Linux affected c6c8fea29769d998d94fcec9b9f14d4b52b349d3 b031fc97e1993d29d6c3a0e86a99140528cf31e8 git Not specified
CNA Linux Linux affected c6c8fea29769d998d94fcec9b9f14d4b52b349d3 035e1fed892d3d06002a73ff73668f618a514644 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 5.10.261 5.10.* semver Not specified
CNA Linux Linux unaffected 5.15.212 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.178 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.145 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/85a71a81854e0e191ad0e533eabb4eff54866feb 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/f19259395b44af67f3c274e34237c295b526b859 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/6abf73589bed3f27ee240c08108feb72bed0b9c6 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/2cefa5141cab8ec1e4b24cf585958b13f2e3049d 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/035e1fed892d3d06002a73ff73668f618a514644 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/6e189f14d1ea28db212b9d70a02131a7ce518012 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/b031fc97e1993d29d6c3a0e86a99140528cf31e8 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/a1820344b180cb55af748f102bc536b5c93164db 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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