SB2026091265 - NULL pointer dereference in Linux kernel block zram driver
Published: September 12, 2026
Security Bulletin ID
SB2026091265
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Partial DoS
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) NULL pointer dereference (CVE-ID: CVE-2026-89717)
CWE-ID: CWE-476 - NULL Pointer Dereference
CVSSv4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to a null pointer dereference in the zram compression algorithm handling when querying the compression algorithm after compressors have been reset. A local user can query the compression algorithm to cause a denial of service.
Remediation
Install update from vendor's website.