SB2024053157 - Use-after-free in Linux kernel block
Published: May 31, 2024 Updated: May 14, 2025
Security Bulletin ID
SB2024053157
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-2021-47379)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the spin_lock_irq() and blkcg_deactivate_policy() functions in block/blk-cgroup.c. A local user can escalate privileges on the system.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/d12ddd843f1877de1f7dd2aeea4907cf9ff3ac08
- https://git.kernel.org/stable/c/f58d305887ad7b24986d58e881f6806bb81b2bdf
- https://git.kernel.org/stable/c/7c2c69e010431b0157c9454adcdd2305809bf9fb
- https://git.kernel.org/stable/c/858560b27645e7e97aca37ee8f232cccd658fbd2
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.70
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.14.9
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.150