{"id":"CVE-2026-80857","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nfuse: wait for FR_FINISHED on abort_on_kill to prevent use-after-free\n\nThe abort_on_kill path in request_wait_answer() calls fuse_abort_conn()\nand returns without waiti…","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nfuse: wait for FR_FINISHED on abort_on_kill to prevent use-after-free\n\nThe abort_on_kill path in request_wait_answer() calls fuse_abort_conn()\nand returns without waiti…","severity":"high","vendor":"Linux","product":"Linux","affected":["Linux >= 0c7fca880a40a209a9c92be14143996d14b93ff6 < a8bbb2a60513bf322170903c21462f0bf4f62be2","Linux >= 204aa22a686bfee48daca7db620c1e017615f2ff < 715cb86e33cda43f5224cdc3fd5610c0b6a46f7a","Linux >= 204aa22a686bfee48daca7db620c1e017615f2ff < 64b0b5cacbd2fea88001464cb712c9dfc795b26e","Linux 300e812b882a174dca675d8028684001ad5826bc","Linux >= 6.18.25 < 6.18.50","Linux >= 7.0.2 < 7.1","Linux 7.1"],"published":"2026-09-04","updated":"2026-09-07","sourceUpdated":"2026-09-07T16:17:30.437","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-80857","references":[{"url":"https://git.kernel.org/stable/c/64b0b5cacbd2fea88001464cb712c9dfc795b26e","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/715cb86e33cda43f5224cdc3fd5610c0b6a46f7a","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/a8bbb2a60513bf322170903c21462f0bf4f62be2","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80857.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-80857"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2528687"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-80857"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-80857"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-80857.mbox"},{"url":"https://kernelcve.org/list/?q=CVE-2026-80857"}],"tags":["nvd","cve.org","csaf","vex","red-hat"],"epss":0.00155,"epssPercentile":0.04539,"ingestedAt":"2026-09-08T15:33:26.962Z","cvss":7,"cvssVector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","cvssSource":"vendor","cwe":["CWE-416"],"slug":"CVE-2026-80857","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nfuse: wait for FR_FINISHED on abort_on_kill to prevent use-after-free\n\nThe abort_on_kill path in request_wait_answer() calls fuse_abort_conn()\nand returns without waiting for FR_FINISHED.  If fuse_dev_do_write() is\nconcurrently processing the same request (FR_LOCKED set), the caller\nfrees req->args while it is still being accessed, causing a\nuse-after-free.\n\nFix this by jumping to the existing wait_event(FR_FINISHED) instead of\nreturning early.  The wait will not hang because fuse_abort_conn()\nensures all requests are ended.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 6 · no fix planned: Red Hat Enterprise Linux 6 · updated 2026-10-25 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80857.json)","depth":"twilight","depthScore":39,"depthScoreParts":{"impact":38.5,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":229475,"id":"CVE-2026-80857","ts":1793019789130,"field":"cvss","old":null,"new":"7"},{"seq":229474,"id":"CVE-2026-80857","ts":1793019789130,"field":"severity","old":"none","new":"high"}]}