SB20260626165 - Improper input validation in Linux kernel wireless

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Main Vulnerability Database SB20260626165

SB20260626165 - Improper input validation in Linux kernel wireless

Published: June 26, 2026

Security Bulletin ID SB20260626165
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) Improper input validation (CVE-ID: CVE-2026-53182)

CWE-ID: CWE-20 - Improper input validation

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 improper input validation in nl80211_parse_rnr_elems() when parsing nested NL80211_ATTR_EMA_RNR_ELEMS input. A local user can send a specially crafted nl80211 message to cause a denial of service.

The issue is related to the element count being stored in a u8-backed cfg80211_rnr_elems::cnt field and incremented past its supported limit.


Remediation

Install update from vendor's website.

References