SB20250226317 - Use-after-free in Linux kernel mm kasan
Published: February 26, 2025 Updated: May 11, 2025
Security Bulletin ID
SB20250226317
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-2021-47640)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the kasan_update_early_region() function in arch/powerpc/mm/kasan/kasan_init_32.c. A local user can escalate privileges on the system.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/5a3d8f3192a409893c57808cc935e16484df1068
- https://git.kernel.org/stable/c/7f19245c3647afea8c7c41f795506ef70f64b9f2
- https://git.kernel.org/stable/c/dd75080aa8409ce10d50fb58981c6b59bf8707d3
- https://git.kernel.org/stable/c/de56beace6648065d404cd9835aa7d30e3df519d
- https://git.kernel.org/stable/c/e3d157a4b4f4e0268c98be5b7013bf4b31234bb6
- https://git.kernel.org/stable/c/f39a3309393a4a484532f6ba745c6acbcfe06115
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.110