Incorrect calculation in Linux kernel - CVE-2026-89962
Published: September 17, 2026
Vulnerability identifier: #VU150328
CSH Severity: Low
CVSS v4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-89962
CWE-ID: CWE-682
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local privileged user to cause data corruption or crashes.
The vulnerability exists due to incorrect range-merging logic in the powerpc kexec memory-range handling code when merging overlapping memory ranges for a kexec operation. A local privileged user can trigger a kexec operation with overlapping memory ranges to cause data corruption or crashes.
Affected software
Linux kernel
How to mitigate CVE-2026-89962
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3