Out-of-bounds read in Linux kernel - CVE-2026-74408
Published: August 15, 2026
Vulnerability identifier: #VU142725
CSH Severity: Low
CVSS v4: 6.8 [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]
CVE-ID: CVE-2026-74408
CWE-ID: CWE-125
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local attacker to cause a denial of service.
The vulnerability exists due to an out-of-bounds read in ath_tx_edma_tasklet() when processing a firmware-provided tx status queue ID. A local attacker can provide an invalid queue ID value to trigger an out-of-bounds array access and cause a denial of service.
Affected software
Linux kernel
Ubuntu
linux-nvidia-tegra (Ubuntu package)
Ubuntu
linux-nvidia-tegra (Ubuntu package)
How to mitigate CVE-2026-74408
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3
linux-nvidia-tegra (Ubuntu package) - update to 6.8.0-1035.38
linux-nvidia-tegra (Ubuntu package) - update to 6.8.0-1035.38
External References
- https://git.kernel.org/stable/c/336d4c8cd9b1646060ee690c881d465dfc09c6c0
- https://git.kernel.org/stable/c/46ca1451f61b598f45cb5259e066d305444d95fc
- https://git.kernel.org/stable/c/5435fd3edcb11c7cc4002847c83e9a50b49284dc
- https://git.kernel.org/stable/c/734db72d55ca578a344dfa33e30145032c074b25
- https://git.kernel.org/stable/c/7ce2f118a2389e8f0a64068c6fe7cc7d40639be0
- https://git.kernel.org/stable/c/a9e055ac62cb3fcea262d4b687ec73eed82b3379
- https://git.kernel.org/stable/c/f5931d06b45ed402572bfe5832fff15864ef5481
- https://git.kernel.org/stable/c/fb11083db9d7d6fb8f98bbba1cbfcf3fb7b4bf54