SB2026091706 - Incorrect calculation in Linux kernel powerpc kexec
Published: September 17, 2026
Security Bulletin ID
SB2026091706
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Data manipulation
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Incorrect calculation (CVE-ID: CVE-2026-89962)
CWE-ID: CWE-682 - Incorrect Calculation
CVSSv4: 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]
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.
Remediation
Install update from vendor's website.