Improper input validation in Linux kernel - CVE-2026-53257
Published: June 26, 2026
Vulnerability identifier: #VU135497
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-2026-53257
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_calculate_ap_params() when processing wireless AP parameters. A local user can provide inconsistent HE or EHT capability and operation elements to cause a denial of service.
The issue can lead to a crash in mac80211 when EHT capability data is present without corresponding EHT operation data.
How to mitigate CVE-2026-53257
Install security update from vendor's repository.