SB20260918334 - Deadlock in Linux kernel bpf
Published: September 18, 2026
Security Bulletin ID
SB20260918334
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) Deadlock (CVE-ID: CVE-2026-90342)
CWE-ID: CWE-833 - Deadlock
CVSSv4: 2 [CVSS:4.0/AV:L/AC:L/AT:P/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 improper lock handling in arena_vm_fault() when handling BPF arena page faults and arena spinlock acquisition fails. A local user can trigger a BPF arena page fault under this condition to cause a denial of service.
Remediation
Install update from vendor's website.