Deadlock in Linux kernel - CVE-2026-23419
Published: April 6, 2026
Vulnerability identifier: #VU124953
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-23419
CWE-ID: CWE-833
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 cause a denial of service.
The vulnerability exists due to a circular locking dependency in rds_tcp_tune when upgrading network reference counting while holding the socket lock. A local user can trigger the vulnerable code path to cause a denial of service.
The issue is caused by memory allocation occurring under the socket lock, creating a lock dependency with fs_reclaim in the Linux kernel RDS TCP code path.
How to mitigate CVE-2026-23419
Install security update from vendor's repository.
Sources
- https://git.kernel.org/stable/c/026bbaeeab9e04534ee58882b6447300629b42f6
- https://git.kernel.org/stable/c/6a877ececd6daa002a9a0002cd0fbca6592a9244
- https://git.kernel.org/stable/c/6ce948fa54599f369ff7fe8b793a6aae4b0762b2
- https://git.kernel.org/stable/c/8519e6883a942e510f33a0e634e27bcc3a844a40
- https://git.kernel.org/stable/c/8babb271403378ba6836f6c8599c5313d0e2355d