SB2026091262 - Race condition in Linux kernel block zram driver
Published: September 12, 2026
Security Bulletin ID
SB2026091262
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) Race condition (CVE-ID: CVE-2026-89719)
CWE-ID: CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
CVSSv4: 0 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N]
The vulnerability allows a local user to perform an out-of-bounds access.
The vulnerability exists due to a race condition in read_block_state() when reading block state information while a zram device is reset and reinitialized with a smaller disk size. A local user can read block state information during this condition to perform an out-of-bounds access.
Remediation
Install update from vendor's website.