Use-after-free in Linux kernel - CVE-2026-64582
Published: August 6, 2026
Vulnerability identifier: #VU141025
CSH Severity: Low
CVSS v4: 7.3 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-64582
CWE-ID: CWE-416
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to cause a denial of service or execute arbitrary code.
The vulnerability exists due to use-after-free in rxe_mmap in the RDMA/rxe subsystem when processing a memory mapping request concurrently with a DESTROY_CQ ioctl. A local user can trigger a race condition to cause a denial of service or execute arbitrary code.
Exploitation requires winning a narrow race window between the mmap path and concurrent object destruction.
Affected software
Linux kernel
How to mitigate CVE-2026-64582
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3
External References
- https://git.kernel.org/stable/c/3525987a392536f31a484833af258971af63b24c
- https://git.kernel.org/stable/c/35744ab3d03c5fca8c1752f53fc8fc674e14c561
- https://git.kernel.org/stable/c/665fb7d22a700c66a78db0cf88c6e6a649aba9d0
- https://git.kernel.org/stable/c/e038d42cc09ca1da9d3568ce8ae062b2bfb3bc0e
- https://git.kernel.org/stable/c/e59a6aa89e0fcd1d0707832eb4654fd9ae7d31e6