Use-after-free in Linux kernel - CVE-2025-38443
Published: July 27, 2025
Vulnerability identifier: #VU113241
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2025-38443
CWE-ID: CWE-416
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
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_start_device() and set_bit() functions in drivers/block/nbd.c. A local user can escalate privileges on the system.
How to mitigate CVE-2025-38443
Install update from vendor's repository.
Sources
- https://git.kernel.org/stable/c/002aca89753f666d878ca0eb8584c372684ac4ba
- https://git.kernel.org/stable/c/8586552df591e0a367eff44af0c586213eeecc3f
- https://git.kernel.org/stable/c/91fa560c73a8126868848ed6cd70607cbf8d87e2
- https://git.kernel.org/stable/c/aa9552438ebf015fc5f9f890dbfe39f0c53cf37e
- https://git.kernel.org/stable/c/cb121c47f364b51776c4db904a6a5a90ab0a7ec5
- https://git.kernel.org/stable/c/d46186eb7bbd9a11c145120f2d77effa8d4d44c2