Improper input validation in Linux kernel - CVE-2026-53182
Published: June 26, 2026
Vulnerability identifier: #VU135607
CSH Severity: Low
CVSS v4.0: 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
CVE-ID: CVE-2026-53182
CWE-ID: CWE-20
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
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.
How to mitigate CVE-2026-53182
Install security update from vendor's repository.
Sources
- https://git.kernel.org/stable/c/265c07c09c837621730d35f02975207a1224bf05
- https://git.kernel.org/stable/c/30c3fa80f423613efdda3deca4af52ff7d20e4e2
- https://git.kernel.org/stable/c/4cd92957e8f8cc4ebfe8a5d4203c14c592fde6b1
- https://git.kernel.org/stable/c/688fcac7054abc680c0eef753f2bb772cfaf8cf7
- https://git.kernel.org/stable/c/ecbf3c45add30a0857414e156bdb9c79906f0ff6
- https://git.kernel.org/stable/c/fc0ec2fc02dfe52c5821f36fbccf6a45df43f508