SB20260918232 - Use-after-free in Linux kernel cxl core driver
Published: September 18, 2026
Security Bulletin ID
SB20260918232
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-2026-92484)
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 access freed memory.
The vulnerability exists due to use-after-free in the CXL region find_pos_and_ways() function when reporting an error after releasing a switch decoder reference. A local user can cause an error that logs the decoder name after its reference is released to access freed memory.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/15da704b732332cc1e8f121f624e5e6c05124c5d
- https://git.kernel.org/stable/c/68edf359b0b45cad2654510c1ca257079b241aa5
- https://git.kernel.org/stable/c/8f7683ce37a53eeabd721941517341d2eef2cf3c
- https://git.kernel.org/stable/c/b38ca9ce8c7d9b8151bb9e4770404c5e39600a48
- https://git.kernel.org/stable/c/f54b96e8aadbfc7f2a1b26df349ef9b062c47d2e