Deadlock in Linux kernel - CVE-2026-98257
Published: October 7, 2026
Vulnerability identifier: #VU153765
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-98257
CWE-ID: CWE-833
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause a denial of service by permanently stalling the RDS connection workqueues.
The vulnerability exists due to a deadlock between synchronous connection teardown and shutdown work in rds_ib_cm_connect_complete() when a peer negotiates a protocol version older than RDS_PROTOCOL_COMPAT_VERSION. A remote attacker can negotiate such a protocol version to cause a denial of service by permanently stalling the RDS connection workqueues.
Affected software
Linux kernel
Debian Linux
linux (Debian package)
Debian Linux
linux (Debian package)
How to mitigate CVE-2026-98257
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3
linux (Debian package) - update to 6.12.113-1
linux (Debian package) - update to 6.12.113-1
External References
- https://git.kernel.org/stable/c/14fb90067d13f4494cff0f03243fae3cf2911cbc
- https://git.kernel.org/stable/c/344c72a0bc2703a6de4918ed935850e07dae3af2
- https://git.kernel.org/stable/c/424019be3f637da76b74f44a40034669acbb166f
- https://git.kernel.org/stable/c/65ca0a5037152a5a80b8fe6aac80eb80458be573
- https://git.kernel.org/stable/c/7d8c22cb2cb1efb5e830a4545c76abf7b35cc2e8
- https://git.kernel.org/stable/c/b5c9f2951d330d4a198a64d6e60f79b4bd6ef078
- https://git.kernel.org/stable/c/d392b16acd0908f077289aad8bba066ff16de336
- https://git.kernel.org/stable/c/f97d8c7bab7843631206a114986c9059da03efeb