CVE-2026-31429
kernel: net: skb: fix cross-cache free of KFENCE-allocated skb head
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · April 20, 2026
Updated · June 28, 2026
Description
A flaw was found in the Linux kernel. When the Kernel Electric Fence (KFENCE), a memory safety error detector, is enabled, a memory corruption vulnerability can occur. This happens because the skb_kfree_head() function incorrectly frees network buffer (skb) head data to the wrong memory cache. This misallocation can lead to system instability or denial of service.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 3.1 · 6.6CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:H
CWE-763 · Release of Invalid Pointer or Reference