PT-2026-34998 · Linux · Linux Kernel

Published 2026-04-24 · Updated 2026-05-03 · CVE-2026-31646

Positive Technologies (AI Summary)

CVSS v3.1

5.5

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)

Description A kernel oops occurs in the Linux kernel due to improper error handling in the lan966x fdma rx alloc page pool() function. The page pool create() function can return an ERR PTR upon failure, which is then used unconditionally in a subsequent loop. This error pointer is passed through xdp rxq info reg mem model() into page pool use xdp mem(), where it is dereferenced.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

NULL Pointer Dereference

Weakness Enumeration

CWE-476

Related Identifiers

CVE-2026-31646

Affected Products

Linux Kernel

References · 15

• https://cve.org/CVERecord?id=CVE-2026-31646 · Security Note
• https://git.kernel.org/stable/c/305832c53551cfbe6e5b81ca7ee765e60f4fe8e9 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2026-31646 · Security Note
• https://git.kernel.org/stable/c/b5dcb41ba891b55157006cac79825c78a32b409e · Patch
• https://git.kernel.org/stable/c/7caf90d9ab97951a58d1de85ab7e7d7cca7a4513 · Patch
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-31646 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2026-31646 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-31646 · Vendor Advisory
• https://osv.dev/vulnerability/BELL-CVE-2026-31646 · Vendor Advisory
• https://git.kernel.org/stable/c/e63265f188ea39dcf5f546770650027528f3bd0f · Patch
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-31646 · Vendor Advisory
• https://git.kernel.org/stable/c/3fd0da4fd8851a7e62d009b7db6c4a05b092bc19 · Patch
• https://git.kernel.org/linus/3fd0da4fd8851a7e62d009b7db6c4a05b092bc19 · Note
• https://docs.bell-sw.com/security/cves/CVE-2026-31646 · Note
• https://twitter.com/CVEnew/status/2047731935712088105 · Twitter Post