{"id":"CVE-2026-80857","state":"PUBLISHED","title":"fuse: wait for FR_FINISHED on abort_on_kill to prevent use-after-free","description":"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 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.","publishedAt":"2026-09-04T15:55:10.641Z","updatedAt":"2026-10-19T08:44:51.239Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"0c7fca880a40a209a9c92be14143996d14b93ff6","status":"affected","lessThan":"a8bbb2a60513bf322170903c21462f0bf4f62be2","versionType":"git"},{"version":"204aa22a686bfee48daca7db620c1e017615f2ff","status":"affected","lessThan":"715cb86e33cda43f5224cdc3fd5610c0b6a46f7a","versionType":"git"},{"version":"204aa22a686bfee48daca7db620c1e017615f2ff","status":"affected","lessThan":"64b0b5cacbd2fea88001464cb712c9dfc795b26e","versionType":"git"},{"version":"300e812b882a174dca675d8028684001ad5826bc","status":"affected","versionType":"git"},{"version":"6.18.25","status":"affected","lessThan":"6.18.50","versionType":"semver"},{"version":"7.0.2","status":"affected","lessThan":"7.1","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/fuse/dev.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"7.1","status":"affected"},{"version":"0","status":"unaffected","lessThan":"7.1","versionType":"semver"},{"version":"6.18.50","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.3","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/fuse/dev.c"]}],"references":["https://git.kernel.org/stable/c/a8bbb2a60513bf322170903c21462f0bf4f62be2","https://git.kernel.org/stable/c/715cb86e33cda43f5224cdc3fd5610c0b6a46f7a","https://git.kernel.org/stable/c/64b0b5cacbd2fea88001464cb712c9dfc795b26e"],"weaknesses":[],"ingestedAt":"2026-10-29T20:13:07.220Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/80xxx/CVE-2026-80857.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-80857","state":"PUBLISHED","datePublished":"2026-09-04T15:55:10.641Z","dateUpdated":"2026-10-19T08:44:51.239Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-08-26T14:34:25.797Z"},"containers":{"cna":{"title":"fuse: wait for FR_FINISHED on abort_on_kill to prevent use-after-free","descriptions":[{"lang":"en","value":"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 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."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"0c7fca880a40a209a9c92be14143996d14b93ff6","status":"affected","lessThan":"a8bbb2a60513bf322170903c21462f0bf4f62be2","versionType":"git"},{"version":"204aa22a686bfee48daca7db620c1e017615f2ff","status":"affected","lessThan":"715cb86e33cda43f5224cdc3fd5610c0b6a46f7a","versionType":"git"},{"version":"204aa22a686bfee48daca7db620c1e017615f2ff","status":"affected","lessThan":"64b0b5cacbd2fea88001464cb712c9dfc795b26e","versionType":"git"},{"version":"300e812b882a174dca675d8028684001ad5826bc","status":"affected","versionType":"git"},{"version":"6.18.25","status":"affected","lessThan":"6.18.50","versionType":"semver"},{"version":"7.0.2","status":"affected","lessThan":"7.1","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/fuse/dev.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"7.1","status":"affected"},{"version":"0","status":"unaffected","lessThan":"7.1","versionType":"semver"},{"version":"6.18.50","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.3","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/fuse/dev.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/a8bbb2a60513bf322170903c21462f0bf4f62be2"},{"url":"https://git.kernel.org/stable/c/715cb86e33cda43f5224cdc3fd5610c0b6a46f7a"},{"url":"https://git.kernel.org/stable/c/64b0b5cacbd2fea88001464cb712c9dfc795b26e"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-19T08:44:51.239Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.18.25","versionEndExcluding":"6.18.50"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"7.1","versionEndExcluding":"7.2.3"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"7.1","versionEndExcluding":"7.3"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"7.0.2"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}