batman-adv: access unicast_ttvn skb->data only after skb realloc

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-72234
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: access unicast_ttvn skb->data only after skb realloc The pskb_may_pull() called by batadv_get_vid() 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 ethernet header but missed for the unicast_packet pointer.

Risk And Classification

Primary CVSS: v3.1 9.8 CRITICAL from 416baaa9-dc9f-4396-8d5f-8c081fb06d67

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

EPSS: 0.006840000 probability, percentile 0.495410000 (date 2026-08-17)

VersionSourceTypeScoreSeverityVector
3.1416baaa9-dc9f-4396-8d5f-8c081fb06d67Secondary9.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
3.1CNADECLARED9.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

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

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected c018ad3de61a1dc4194879a53e5559e094aa7b1a aa9558af859934f24717d4bab97d61004f91a736 git Not specified
CNA Linux Linux affected c018ad3de61a1dc4194879a53e5559e094aa7b1a 9c2c05629e46c1fd43931506d41c56a885a98eb4 git Not specified
CNA Linux Linux affected c018ad3de61a1dc4194879a53e5559e094aa7b1a 7b162b36de750565404cd3b98315706622c6974f git Not specified
CNA Linux Linux affected c018ad3de61a1dc4194879a53e5559e094aa7b1a ed90eb5c68420cdfe67ec1f773324198d2ef6f50 git Not specified
CNA Linux Linux affected c018ad3de61a1dc4194879a53e5559e094aa7b1a 979175834a699ccc3c4c0b0ba60ecae0f135a587 git Not specified
CNA Linux Linux affected c018ad3de61a1dc4194879a53e5559e094aa7b1a b8afcf799b2cc92c41beebd029e53ed18960184a git Not specified
CNA Linux Linux affected c018ad3de61a1dc4194879a53e5559e094aa7b1a 9a7b7248798123efbd5fafe58461d57c7cc718af git Not specified
CNA Linux Linux affected c018ad3de61a1dc4194879a53e5559e094aa7b1a 7141990add3f75436f2933cb310654cad3b1e3e9 git Not specified
CNA Linux Linux affected 3.13 Not specified
CNA Linux Linux unaffected 3.13 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/9a7b7248798123efbd5fafe58461d57c7cc718af 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/ed90eb5c68420cdfe67ec1f773324198d2ef6f50 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/7b162b36de750565404cd3b98315706622c6974f 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/979175834a699ccc3c4c0b0ba60ecae0f135a587 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/b8afcf799b2cc92c41beebd029e53ed18960184a 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/9c2c05629e46c1fd43931506d41c56a885a98eb4 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/aa9558af859934f24717d4bab97d61004f91a736 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/7141990add3f75436f2933cb310654cad3b1e3e9 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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