SB2025091967 - Use-after-free in Linux kernel nfsd
Published: September 19, 2025 Updated: September 22, 2025
Security Bulletin ID
SB2025091967
Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Use-after-free (CVE-ID: CVE-2022-50401)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the setup_callback_client() function in fs/nfsd/nfs4callback.c. A local user can escalate privileges on the system.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/15fc60aa5bdcf6d5f93000d3d00579fc67632ee0
- https://git.kernel.org/stable/c/3bc8edc98bd43540dbe648e4ef91f443d6d20a24
- https://git.kernel.org/stable/c/707bcca9616002d204091ca7c4d1d91151104332
- https://git.kernel.org/stable/c/9b4ae8c42d2ff09ed7c5832ccce5684c55e5ed23
- https://git.kernel.org/stable/c/a472f069ced8601979f53c13c0cf20236074ed46
- https://git.kernel.org/stable/c/c1207219a4bfa50121c9345d5d165470d0a82531
- https://git.kernel.org/stable/c/d843ebd860c58a38e45527e8ec6516059f4c97f3
- https://git.kernel.org/stable/c/e2f9f03e4537f3fcc8fd2bdd3248530c3477a371
- https://git.kernel.org/stable/c/fddac3b4578d302ac9e51e7f03a9aae6254ae2a3
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.229