SB20251226305 - Race condition in Linux kernel char hw_random driver
Published: December 26, 2025 Updated: December 31, 2025
Security Bulletin ID
SB20251226305
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) Race condition (CVE-ID: CVE-2023-53998)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a race condition within the request_entropy() and virtio_read() functions in drivers/char/hw_random/virtio-rng.c. A local user can escalate privileges on the system.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/22c30022cde6e2c88612b3a499223cfa912f1bc7
- https://git.kernel.org/stable/c/241ef15776a7c8505008db689175b320d345ecd3
- https://git.kernel.org/stable/c/2fc91f156b3f3446a1bce80cf4adedcbf41271c2
- https://git.kernel.org/stable/c/318657b4c2077289659f1cd9e2a34f6a3b208e3e
- https://git.kernel.org/stable/c/77471e4912d3960dafe141e268c44be8024fe4dc
- https://git.kernel.org/stable/c/a43bcb0b661cbbf3ad797d2aee6b6fd06b8fc69d
- https://git.kernel.org/stable/c/ac52578d6e8d300dd50f790f29a24169b1edd26c
- https://git.kernel.org/stable/c/c76d991b6f01a5d931e7053a73bc9524975a5215
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15.121