{"id":"CVE-2026-90069","title":"In the Linux kernel, the following vulnerability has been resolved:\n\ncrypto: acomp - allocate async request context when cloning\n\nACOMP_REQUEST_ON_STACK() reserves only enough storage for the\nsynchronous fallback","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\ncrypto: acomp - allocate async request context when cloning\n\nACOMP_REQUEST_ON_STACK() reserves only enough storage for the\nsynchronous fallback. When an async implement…","severity":"high","cvss":7.8,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","vendor":"Linux","product":"Linux","affected":["Linux >= 097c432caaa6d91f87732fe991cb08139e31101a < d48197cbd5d3476c7deea644972e9ec510865ec2","Linux >= 097c432caaa6d91f87732fe991cb08139e31101a < 889fa17a0af09ff93a9166abc82ee7a654faa49b","Linux >= 097c432caaa6d91f87732fe991cb08139e31101a < ee440d4fc0d2f15894ab1f64c474a3adbc858880","Linux 6.16"],"published":"2026-09-17","updated":"2026-09-18","sourceUpdated":"2026-09-18T18:17:40.710","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-90069","references":[{"url":"https://git.kernel.org/stable/c/889fa17a0af09ff93a9166abc82ee7a654faa49b","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/d48197cbd5d3476c7deea644972e9ec510865ec2","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/ee440d4fc0d2f15894ab1f64c474a3adbc858880","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"tags":["nvd","cve.org"],"epss":0.00161,"epssPercentile":0.05761,"ingestedAt":"2026-09-17T16:21:47.899Z","slug":"CVE-2026-90069","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\ncrypto: acomp - allocate async request context when cloning\n\nACOMP_REQUEST_ON_STACK() reserves only enough storage for the\nsynchronous fallback. When an async implementation is selected, callers\nclone that stack request before retrying, but acomp_request_clone()\ncurrently copies only the stack-sized object. The clone therefore has no\nstorage for the async provider request context, and providers such as QAT\nwrite past the allocation through acomp_request_ctx(). KASAN does report\na slab OOB write.\n\nAllocate a zeroed clone large enough for the runtime acomp request size,\ncopy only the bytes present in the source object, and preserve the\nexisting fallback-on-allocation-failure behavior. Use the runtime reqsize\nbecause an implementation may adjust it during tfm initialization.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":43,"depthScoreParts":{"impact":42.9,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":207105,"id":"CVE-2026-90069","ts":1789757332319,"field":"cvss","old":null,"new":"7.8"},{"seq":207104,"id":"CVE-2026-90069","ts":1789757332319,"field":"severity","old":"none","new":"high"}]}