SB2026092517 - Out-of-bounds read in Linux kernel cxl core driver
Published: September 25, 2026
Security Bulletin ID
SB2026092517
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) Out-of-bounds read (CVE-ID: CVE-2026-97423)
CWE-ID: CWE-125 - Out-of-bounds read
CVSSv4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]
The vulnerability allows a local user to read memory out of bounds.
The vulnerability exists due to an out-of-bounds read in the cxl/region construct_region() function when constructing a region with an unresolved partition index. A local user can trigger region construction with an unresolved partition index to read memory out of bounds.
The partition index has an initial value of -1 when it has not been resolved.
Remediation
Install update from vendor's website.