Out-of-bounds read in Linux kernel - CVE-2026-80670
Published: August 28, 2026
Vulnerability identifier: #VU146124
CSH Severity: Low
CVSS v4: 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]
CVE-ID: CVE-2026-80670
CWE-ID: CWE-125
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
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.
Affected software
Linux kernel
How to mitigate CVE-2026-80670
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3