Race condition in Linux kernel - CVE-2026-90371

Vulnerability identifier: #VU151112

CSH Severity: Low

CVSS v4: 0 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-90371

CWE-ID: CWE-362

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a local user to trigger a buffer recycling race.

The vulnerability exists due to a race condition in RXDMAD_C buffer recycling in the mt76 DMA code when processing buffers from RRO data queues. A local user can trigger RXDMAD_C buffer processing to trigger a buffer recycling race.

The relevant RRO data-queue page pools are bound to a different NAPI context.

Linux kernel
Ubuntu
linux (Ubuntu package)
linux-aws (Ubuntu package)
linux-gcp (Ubuntu package)
linux-oracle (Ubuntu package)
linux-ibm (Ubuntu package)
linux-hwe-7.0 (Ubuntu package)
linux-oem-7.0 (Ubuntu package)

Install security update from vendor's repository.

linux (Ubuntu package) - update to 7.0.0-42.42
linux-aws (Ubuntu package) - update to 7.0.0-1016.17
linux-gcp (Ubuntu package) - update to 7.0.0-1016.18
linux-oracle (Ubuntu package) - update to 7.0.0-1015.16
linux-ibm (Ubuntu package) - update to 7.0.0-1017.17
linux-hwe-7.0 (Ubuntu package) - update to 7.0.0-42.42~24.04.1
linux-oem-7.0 (Ubuntu package) - update to 7.0.0-1017.17

• https://git.kernel.org/stable/c/7ac05ed3a50e511c93f8506e555709a208dfce0a
• https://git.kernel.org/stable/c/a273dc3b86a7d983d643827d3d3c795d55d8f632
• https://git.kernel.org/stable/c/e1f97c10a4ec2b9db69a134b757304399ca903ce

• Race condition in Linux kernel mediatek mt76 driver
• Ubuntu update for linux-oem-7.0
• Ubuntu update for linux, linux-aws, linux-gcp and more