SB20260918125 - Infinite loop in Linux kernel cxl core driver
Published: September 18, 2026
Security Bulletin ID
SB20260918125
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Physical access
Highest impact
Partial DoS
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Infinite loop (CVE-ID: CVE-2026-93097)
CWE-ID: CWE-835 - Loop with Unreachable Exit Condition ('Infinite Loop')
CVSSv4: 2.4 [CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
The vulnerability allows an attacker with physical access to cause a denial of service.
The vulnerability exists due to an infinite loop in the CXL poison list processing function when processing a device response containing an empty poison payload with the CXL_POISON_FLAG_MORE flag set. An attacker with physical access can cause a CXL device to return a crafted poison response to cause a denial of service.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/42eab80981f4d2ac820e253e80ecf92f8cd91f69
- https://git.kernel.org/stable/c/6ad491cef1a812cf7b53aa769cd8869516c47362
- https://git.kernel.org/stable/c/86771c105293ca26bfcc320b4f60d32c137b54aa
- https://git.kernel.org/stable/c/8b301c4afbce4bc3f94528441d8d5ce1366504ad
- https://git.kernel.org/stable/c/e77594e0cea67ab1c2317a27aa77a744e26ad6a6