Race condition in Linux kernel - CVE-2026-43371
Published: May 9, 2026
Vulnerability identifier: #VU130806
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-2026-43371
CWE-ID: CWE-362
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 race condition in the macb driver transmit ring handling when resuming transmission after transmit has been disabled. A local user can trigger network transmission during this state to cause a denial of service.
The issue can leave transmission stuck until a new packet is queued, and queued packets may be silently lost with associated skb memory not being released.
How to mitigate CVE-2026-43371
Install security update from vendor's repository.
Sources
- https://git.kernel.org/stable/c/0a47c3889fcd843c72aa57fa8c4d06f5801fced4
- https://git.kernel.org/stable/c/403182e0771b250cfde0fe7e1081d095ceaf8230
- https://git.kernel.org/stable/c/58f5d34f88e8f00910b692537f7b2efdb8c3705d
- https://git.kernel.org/stable/c/881a0263d502e1a93ebc13a78254e9ad19520232
- https://git.kernel.org/stable/c/88f974fe118cb4653f029929ecbca7cfe06132ae
- https://git.kernel.org/stable/c/c6783bfa31a59f34fe4feb1bdbf67791ef3fb0b7