SB20240531179 - Use-after-free in Linux kernel btrfs
Published: May 31, 2024 Updated: May 14, 2025
Security Bulletin ID
SB20240531179
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-2021-46958)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the cleanup_transaction() function in fs/btrfs/transaction.c. A local user can escalate privileges on the system.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/a4794be7b00b7eda4b45fffd283ab7d76df7e5d6
- https://git.kernel.org/stable/c/633f7f216663587f17601eaa1cf2ac3d5654874c
- https://git.kernel.org/stable/c/e2da98788369bfba1138bada72765c47989a4338
- https://git.kernel.org/stable/c/061dde8245356d8864d29e25207aa4daa0be4d3c
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.36
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.11.20
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.3
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13