Deadlock in Linux kernel - CVE-2026-43296
Published: May 9, 2026
Vulnerability identifier: #VU130891
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-2026-43296
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 hardware-induced deadlock condition in the octeontx2-af NIX SQ manager and PSE handling logic when multiple send queues share an SMQ and transmit concurrently or when sticky and non-sticky transmissions transition. A local user can trigger concurrent transmissions to cause a denial of service.
The issue can also manifest as loss of forward progress under load with credit loss.
How to mitigate CVE-2026-43296
Install security update from vendor's repository.
Sources
- https://git.kernel.org/stable/c/36cc5a5e0178d5fb79e04173b8aa623b0108819a
- https://git.kernel.org/stable/c/70e9a5760abfb6338d63994d4de6b0778ec795d6
- https://git.kernel.org/stable/c/8052d0587fb14b85539c3a14a226586c0c3d6b4c
- https://git.kernel.org/stable/c/9a3fd301329474f449e75f86d8a4f6b9c603fd6c
- https://git.kernel.org/stable/c/b7eba260a34e854e2487b8363c11976f082df00d
- https://git.kernel.org/stable/c/cec2ceb35ce7bc874c43812bb39200d6cf691b87
- https://git.kernel.org/stable/c/d0b3c8a80336029d9356f429151eb27922d80a3c
- https://git.kernel.org/stable/c/d9b549b6951ba178ec14339a031cae65f4e43fe1