PT-2026-26101 · Linux · Linux Kernel

Qualys Research Team · Published 2026-01-01 · Updated 2026-05-21 · CVE-2026-23251

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 versions 6.9 through 6.10

Description The Linux kernel contains a flaw where the xfarray and xfblob destructors are called with an invalid pointer. This occurs when a valid pointer is not present, potentially leading to system instability or unexpected behavior. The issue was addressed by ensuring the destructors are only invoked when a valid pointer exists, and by nullifying the pointer afterward. This correction impacts numerous commits merged between kernel versions 6.9 and 6.10.

Recommendations Update to a version beyond 6.10.

Exploit

Fix

NULL Pointer Dereference

Weakness Enumeration

CWE-476

Related Identifiers

BDU:2026-03487

CVE-2026-23251

Affected Products

Linux Kernel

References · 23

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/23xxx/CVE-2026-23251.json · Exploit
• https://security-tracker.debian.org/tracker/CVE-2026-23251 · Vendor Advisory
• https://git.kernel.org/stable/c/c9ccefacae0d8091683447bc338bd7741417039d · Patch
• https://git.kernel.org/stable/c/ba408d299a3bb3c5309f40c5326e4fb83ead4247 · Patch
• https://osv.dev/vulnerability/CVE-2026-23251 · Vendor Advisory
• https://bdu.fstec.ru/vul/2026-03487 · Security Note
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-23251 · Vendor Advisory
• https://osv.dev/vulnerability/BELL-CVE-2026-23251 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-23251 · Security Note
• https://git.kernel.org/stable/c/d827612c81a26cc1dd83a211cfcb5ad8765da0c4 · Patch
• https://ubuntu.com/security/CVE-2026-23251 · Vendor Advisory
• https://git.kernel.org/stable/c/5de5be3ed7e7fa4ebde4f4b58fb9a629644f9202 · Patch
• https://linux.oracle.com/errata/ELSA-2026-50260.html · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-23251 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2026-23251 · Security Note