SB20260815183 - Operation on a Resource after Expiration or Release in Linux kernel core
Published: August 15, 2026
Security Bulletin ID
SB20260815183
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) Operation on a Resource after Expiration or Release (CVE-ID: CVE-2026-74288)
CWE-ID: CWE-672 - Operation on a Resource after Expiration or Release
CVSSv4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/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 improper reference count handling in fib_rules_dump() when dumping fib_rule entries during an RCU dump. A local user can trigger fib_rule processing involving a dying fib_rule to cause a denial of service.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/0f929b59f4cd0e05bb1ecefe12b77e85911d4be2
- https://git.kernel.org/stable/c/1fbc6c6efe78f4454a51afa0587efb6826f60f00
- https://git.kernel.org/stable/c/2821e85c058f81c9948a2fb1a634f7b47457d51c
- https://git.kernel.org/stable/c/2dfdc210d240bd48bb2ea746430b02b5571b6db9
- https://git.kernel.org/stable/c/3af0bc1bd9039e2e50abf3e2d7fee411f38bce4e
- https://git.kernel.org/stable/c/4b7ae30c81c2ee10a644749a3704a5c797ccc308
- https://git.kernel.org/stable/c/a7ef30753353ba6a95d693b1863a0214222a199a
- https://git.kernel.org/stable/c/bb4a5b3c91af3c8d705bb2e9f6f8069a70db26fc