Bug 2432375 (CVE-2026-22988) - CVE-2026-22988 kernel: arp: do not assume dev_hard_header() does not change skb->head
Summary: CVE-2026-22988 kernel: arp: do not assume dev_hard_header() does not change s...
Keywords:
Status: NEW
Alias: CVE-2026-22988
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-01-23 16:01 UTC by OSIDB Bzimport
Modified: 2026-01-23 19:46 UTC (History)
0 users

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Description OSIDB Bzimport 2026-01-23 16:01:29 UTC 
In the Linux kernel, the following vulnerability has been resolved:

arp: do not assume dev_hard_header() does not change skb->head

arp_create() is the only dev_hard_header() caller
making assumption about skb->head being unchanged.

A recent commit broke this assumption.

Initialize @arp pointer after dev_hard_header() call.
Comment 1 Keith Grant 2026-01-23 19:42:08 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026012350-CVE-2026-22988-1ee5@gregkh/T
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