SB2024053116 - Use-after-free in Linux kernel gfs2
Published: May 31, 2024 Updated: May 14, 2025
Security Bulletin ID
SB2024053116
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-2021-47254)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the __acquires() and gfs2_scan_glock_lru() functions in fs/gfs2/glock.c. A local user can escalate privileges on the system.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/38ce329534500bf4ae71f81df6a37a406cf187b4
- https://git.kernel.org/stable/c/92869945cc5b78ee8a1ef90336fe070893e3458a
- https://git.kernel.org/stable/c/0364742decb0f02bc183404868b82896f7992595
- https://git.kernel.org/stable/c/094bf5670e762afa243d2c41a5c4ab71c7447bf4
- https://git.kernel.org/stable/c/86fd5b27db743a0ce0cc245e3a34813b2aa6ec1d
- https://git.kernel.org/stable/c/a61156314b66456ab6a291ed5deba1ebd002ab3c
- https://git.kernel.org/stable/c/e87ef30fe73e7e10d2c85bdcc778dcec24dca553
- https://git.kernel.org/stable/c/1ab19c5de4c537ec0d9b21020395a5b5a6c059b2
- https://mirrors.edge.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.238
- https://mirrors.edge.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.19.196
- https://mirrors.edge.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.4.274
- https://mirrors.edge.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.274
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.45
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.12
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.127