SB2025040373 - Use-after-free in Linux kernel proc
Published: April 3, 2025 Updated: May 11, 2025
Security Bulletin ID
SB2025040373
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-2025-21999)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the proc_get_inode() function in fs/proc/inode.c, within the proc_create_reg(), proc_create_seq_private() and proc_create_single_data() functions in fs/proc/generic.c. A local user can escalate privileges on the system.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/63b53198aff2e4e6c5866a4ff73c7891f958ffa4
- https://git.kernel.org/stable/c/64dc7c68e040251d9ec6e989acb69f8f6ae4a10b
- https://git.kernel.org/stable/c/654b33ada4ab5e926cd9c570196fefa7bec7c1df
- https://git.kernel.org/stable/c/966f331403dc3ed04ff64eaf3930cf1267965e53
- https://git.kernel.org/stable/c/ede3e8ac90ae106f0b29cd759aadebc1568f1308
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.12.21