SB20260812358 - NULL pointer dereference in Linux kernel fs

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Main Vulnerability Database SB20260812358

SB20260812358 - NULL pointer dereference in Linux kernel fs

Published: August 12, 2026

Security Bulletin ID SB20260812358
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local access
Highest impact Denial of service

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) NULL pointer dereference (CVE-ID: CVE-2026-68186)

CWE-ID: CWE-476 - NULL Pointer Dereference

CVSSv4: 5.7 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows a local user to cause a denial of service.

The vulnerability exists due to a null pointer dereference in load_misc_binary() and begin_new_exec() when processing a binfmt_misc entry with the open-binary flag after an interpreter open fails with -ENOEXEC. A local user can register a crafted binfmt_misc entry and execute a matching native ELF binary to cause a denial of service.

Exploitation requires binfmt_misc to be mountable in a user namespace and relies on the interpreter being located on a FUSE mount whose server fails the open request with -ENOEXEC.


Remediation

Install update from vendor's website.

References