Off-by-one in Linux kernel - CVE-2026-43445
Published: May 8, 2026
Vulnerability identifier: #VU130744
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-2026-43445
CWE-ID: CWE-193
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 an off-by-one error in the e1000 and e1000e TX buffer DMA cleanup logic when handling DMA mapping errors. A local user can trigger DMA mapping failures to cause a denial of service.
How to mitigate CVE-2026-43445
Install security update from vendor's repository.
Sources
- https://git.kernel.org/stable/c/0606c24a745bafd1be5d66c48361638cd9cad74b
- https://git.kernel.org/stable/c/0a1fc25deabab4efce64610e3c449485c4fa8f5f
- https://git.kernel.org/stable/c/10b5e65959e955a1c8894e0a5413944b5a70204a
- https://git.kernel.org/stable/c/30e87ade8d678c25a8546cf38c0b498fa5cb27d3
- https://git.kernel.org/stable/c/519051c711dfd239ef6e4b28878efee400a035f9
- https://git.kernel.org/stable/c/7eaeb778bfaa3b2a804f89321c234d59c74569db
- https://git.kernel.org/stable/c/e94eaef11142b01f77bf8ba4d0b59720b7858109
- https://git.kernel.org/stable/c/fa5ba9867a55e640df0dc79bf0199770fb043f03