Memory leak in Linux kernel - CVE-2026-99106
Published: October 29, 2026
Vulnerability identifier: #VU158491
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-2026-99106
CWE-ID: CWE-401
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to exhaust kernel memory and potentially cause a denial of service.
The vulnerability exists due to missing deallocation of HMM ranges in the Linux kernel AMDGPU command submission error paths when command submission fails after amdgpu_cs_parser_bos() succeeds. A local user can submit repeated command streams containing an indirect buffer with an unmapped va_start on a ring that patches command streams in place, such as VCN, to leak HMM ranges, their hmm_pfns arrays, and retained buffer object references, potentially exhausting kernel memory.
Affected software
Linux kernel
How to mitigate CVE-2026-99106
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3