SB20260528246 - NULL pointer dereference in Linux kernel net slip driver

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Main Vulnerability Database SB20260528246

SB20260528246 - NULL pointer dereference in Linux kernel net slip driver

Published: May 28, 2026

Security Bulletin ID SB20260528246
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-2026-45842)

CWE-ID: CWE-476 - NULL Pointer Dereference

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear


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

The vulnerability exists due to a null pointer dereference in the SLIP/PPP VJ receive handling code when processing inbound VJ-compressed or VJ-uncompressed frames after installing a malformed VJ state with zero receive slots. A local user can configure PPP compression state through /dev/ppp and trigger processing of a frame selecting slot 0 to cause a denial of service.

The issue is reachable through PPPIOCSMAXCID from an unprivileged user namespace.


Remediation

Install update from vendor's website.

References