SB2025022766 - Use-after-free in Linux kernel block driver
Published: February 27, 2025 Updated: May 11, 2025
Security Bulletin ID
SB2025022766
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-2025-21731)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the nbd_disconnect_and_put() function in drivers/block/nbd.c. A local user can escalate privileges on the system.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/844b8cdc681612ff24df62cdefddeab5772fadf1
- https://git.kernel.org/stable/c/9793bd5ae4bdbdb2dde401a3cab94a6bfd05e302
- https://git.kernel.org/stable/c/a8ee6ecde2b7bfb58c8a3afe8a9d2b848f580739
- https://git.kernel.org/stable/c/d208d2c52b652913b5eefc8ca434b0d6b757f68f
- https://git.kernel.org/stable/c/e7343fa33751cb07c1c56b666bf37cfca357130e
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.1.129