Double free in Linux kernel - CVE-2026-80618
Published: August 28, 2026
Vulnerability identifier: #VU146266
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-2026-80618
CWE-ID: CWE-415
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 a double free in amdgpu_amdkfd_gpuvm_free_memory_of_gpu() when freeing DOORBELL or MMIO remap buffer objects that remain mapped to GPU memory. A local user can trigger memory free operations on such buffer objects to cause a denial of service.
The issue occurs because the buffer object may be unpinned before the function determines it cannot yet be freed and returns -EBUSY, leaving it to be unpinned again later during process teardown.
Affected software
Linux kernel
How to mitigate CVE-2026-80618
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3
External References
- https://git.kernel.org/stable/c/0e27d92f69b8e4c750a4b181cc05a86b9338c4f5
- https://git.kernel.org/stable/c/1d12ae8b079e173107abec0e5817332954c8e95f
- https://git.kernel.org/stable/c/283e77af49fda96aaa57709fc5408b55ffec075e
- https://git.kernel.org/stable/c/3f0cc1735273a57c5116710cf0202e12152f59cc
- https://git.kernel.org/stable/c/461ae406ae12107ebb321cabe561434c27aaea58
- https://git.kernel.org/stable/c/c055a2088b719e9a4b580685e0ca97f9554a41a8