SB2026082899 - Out-of-bounds read in Linux kernel perf util
Published: August 28, 2026
Security Bulletin ID
SB2026082899
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote 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-2026-80670)
CWE-ID: CWE-125 - Out-of-bounds read
CVSSv4: 4.6 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]
The vulnerability allows a local user to disclose sensitive information.
The vulnerability exists due to an out-of-bounds read in machine__resolve() when parsing a crafted perf.data sample with a large CPU index. A local user can supply a specially crafted perf.data file to disclose sensitive information.
User interaction is required to open or process the crafted perf.data file.
Remediation
Install update from vendor's website.