Improper resource shutdown or release in Linux kernel - CVE-2026-74280
Published: August 15, 2026
Vulnerability identifier: #VU142912
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-2026-74280
CWE-ID: CWE-404
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to improper resource management in the sg_cleanup path in drivers/crypto/marvell/octeontx/otx_cptvf_reqmgr.c when cleaning up DMA mappings after a setup failure. A local user can trigger the cleanup path to cause a denial of service.
The issue uses the wrong loop index during DMA unmapping, which can leak successfully mapped entries while repeatedly unmapping the failed one.
Affected software
Linux kernel
Ubuntu
linux-nvidia-tegra (Ubuntu package)
Ubuntu
linux-nvidia-tegra (Ubuntu package)
How to mitigate CVE-2026-74280
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/5f99a396f706afc749448659d1565991330e4f71
- https://git.kernel.org/stable/c/6c721a3e43344f8560ee4ef506fc1f72b4646dcd
- https://git.kernel.org/stable/c/7891c64c0520519782470ba29bac8a5761e295d8
- https://git.kernel.org/stable/c/8a0db9fad3c97e6447a92417cb95d7c55eaa9530
- https://git.kernel.org/stable/c/8d301e5a51173ba56ce4f632a2a33bf6b14b0fcf
- https://git.kernel.org/stable/c/97f150ba3e372256eabb93bd80c2cf3740077fb5
- https://git.kernel.org/stable/c/acff30cfc0d72465b51b0bfdf019f1cb54e15314
- https://git.kernel.org/stable/c/ed374dbc70c10c4a864414b3d9c257faec8fd485