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CVE-2026-72235

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

HIGH
8.8
CVSS Score
Published: August 15, 2026 at 05:54 AM UTC
Updated: October 16, 2026 at 07:17 PM UTC
1 product affected across 1 vendorLinux Kernel

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Severity
HIGH8.8
Exploit prediction
EPSS 0.3%
SSVC
No known exploit

Description

In 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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Linux Kernel· Linux
90%
2.6.38c6c8fea29769d998d94fcec9b9f14d4b52b349d3
Vendor states this is fixed in 035e1fed892d3d06002a73ff73668f618a514644 (fixed)
Vendor states this is fixed in 2cefa5141cab8ec1e4b24cf585958b13f2e3049d (fixed)
Vendor states this is fixed in 6abf73589bed3f27ee240c08108feb72bed0b9c6 (fixed)
Vendor states this is fixed in 6e189f14d1ea28db212b9d70a02131a7ce518012 (fixed)
Vendor states this is fixed in 85a71a81854e0e191ad0e533eabb4eff54866feb (fixed)
Vendor states this is fixed in a1820344b180cb55af748f102bc536b5c93164db (fixed)
Vendor states this is fixed in b031fc97e1993d29d6c3a0e86a99140528cf31e8 (fixed)
Vendor states this is fixed in f19259395b44af67f3c274e34237c295b526b859 (fixed)
Vendor states this is fixed in 2.6.38 (unaffected)
Vendor states this is fixed in 5.10.261 (unaffected)
Vendor states this is fixed in 5.15.212 (unaffected)
Vendor states this is fixed in 6.1.178 (unaffected)
Vendor states this is fixed in 6.12.97 (unaffected)
Vendor states this is fixed in 6.18.40 (unaffected)
Vendor states this is fixed in 6.6.145 (unaffected)
Vendor states this is fixed in 7.1.5 (unaffected)
Vendor states this is fixed in 7.2 (unaffected)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (8)

Source: cverecord
https://git.kernel.org/stable/c/6e189f14d1ea28db212b9d70a02131a7ce518012
Source: cverecord
https://git.kernel.org/stable/c/a1820344b180cb55af748f102bc536b5c93164db
Source: cverecord
https://git.kernel.org/stable/c/6abf73589bed3f27ee240c08108feb72bed0b9c6
Source: cverecord
https://git.kernel.org/stable/c/f19259395b44af67f3c274e34237c295b526b859
Source: cverecord
https://git.kernel.org/stable/c/2cefa5141cab8ec1e4b24cf585958b13f2e3049d
Source: cverecord
https://git.kernel.org/stable/c/85a71a81854e0e191ad0e533eabb4eff54866feb
Source: cverecord
https://git.kernel.org/stable/c/b031fc97e1993d29d6c3a0e86a99140528cf31e8
Source: cverecord
https://git.kernel.org/stable/c/035e1fed892d3d06002a73ff73668f618a514644

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

8.8HIGHLinux
Vector?

Quick Info

StatusRECEIVED

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