SB2026091266 - Memory corruption in Linux kernel block zram driver
Published: September 12, 2026
Security Bulletin ID
SB2026091266
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) Memory corruption (CVE-ID: CVE-2026-89718)
CWE-ID: CWE-119 - Memory corruption
CVSSv4: 0 [CVSS:4.0/AV:L/AC:L/AT:P/PR:H/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N]
The vulnerability allows a local privileged user to access slots outside of table bounds.
The vulnerability exists due to improper synchronization in writeback_store() when a device is reset and reconfigured with a smaller disksize while writeback_store() is waiting to acquire dev_lock. A local privileged user can reset and reconfigure the device with a smaller disksize during the lock acquisition to access slots outside of table bounds.
Remediation
Install update from vendor's website.