SB2026091715 - NULL pointer dereference in Linux kernel s390 crypto driver
Published: September 17, 2026
Security Bulletin ID
SB2026091715
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) NULL pointer dereference (CVE-ID: CVE-2026-89955)
CWE-ID: CWE-476 - NULL Pointer Dereference
CVSSv4: 5.7 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/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 status_show() when reading the sysfs status attribute during queue probing. A local user can concurrently read the status attribute before queue driver data is set to cause a denial of service.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/31fa0a8a3c337ed2d200166d6926ab23c14f8b2e
- https://git.kernel.org/stable/c/69632952aca04caa71e49953b6949fc04e788e67
- https://git.kernel.org/stable/c/7db2511fc601ca3a6e3fb1bdce02261c3c3167c3
- https://git.kernel.org/stable/c/dd6f4ef6f8a37412909ad787c837332fb070159c
- https://git.kernel.org/stable/c/e102ce0f4af99dff769a4b1b4daa4cc6bd5ad2d9