SB20260918439 - Use-after-free in Linux kernel nfc
Published: September 18, 2026
Security Bulletin ID
SB20260918439
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Information disclosure
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Use-after-free (CVE-ID: CVE-2026-90225)
CWE-ID: CWE-416 - Use After Free
CVSSv4: 0 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N]
The vulnerability allows a local user to trigger a use-after-free condition.
The vulnerability exists due to use-after-free in nfc_llcp_getsockopt() when racing a getsockopt call with an in-flight bind operation. A local user can invoke getsockopt() while bind() modifies and frees the cached local pointer to trigger a use-after-free condition.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/156e65bd29307f5053835bff60bc1ba342fa010f
- https://git.kernel.org/stable/c/2d8ac24565be85bf56580b87bf1b874d35625eb5
- https://git.kernel.org/stable/c/36812527052c5bfb1ec6c1e292d67a5bf76b750f
- https://git.kernel.org/stable/c/56fd158fef20268f48db6cdfe5d722e930134eda
- https://git.kernel.org/stable/c/8ba8cec0586727cc135ca4827921fc7b52946d71
- https://git.kernel.org/stable/c/d1b73962675cdc5a58e2707e25b548d8b495fde0
- https://git.kernel.org/stable/c/ed5240bab3468988077fe8bf29b935eaecc9ff89
- https://git.kernel.org/stable/c/fe65727a4a21b11c18eebae1338482767a897b76