{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-23234", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-01-13T15:37:45.988Z", "datePublished": "2026-03-04T14:36:38.843Z", "dateUpdated": "2026-03-04T14:36:38.843Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-03-04T14:36:38.843Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nf2fs: fix to avoid UAF in f2fs_write_end_io()\n\nAs syzbot reported an use-after-free issue in f2fs_write_end_io().\n\nIt is caused by below race condition:\n\nloop device\t\t\t\tumount\n- worker_thread\n - loop_process_work\n - do_req_filebacked\n - lo_rw_aio\n - lo_rw_aio_complete\n - blk_mq_end_request\n - blk_update_request\n - f2fs_write_end_io\n - dec_page_count\n - folio_end_writeback\n\t\t\t\t\t- kill_f2fs_super\n\t\t\t\t\t - kill_block_super\n\t\t\t\t\t - f2fs_put_super\n\t\t\t\t\t : free(sbi)\n : get_pages(, F2FS_WB_CP_DATA)\n accessed sbi which is freed\n\nIn kill_f2fs_super(), we will drop all page caches of f2fs inodes before\ncall free(sbi), it guarantee that all folios should end its writeback, so\nit should be safe to access sbi before last folio_end_writeback().\n\nLet's relocate ckpt thread wakeup flow before folio_end_writeback() to\nresolve this issue."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/f2fs/data.c"], "versions": [{"version": "e234088758fca3a669ebb1a02d8bf7bf60f0e4ff", "lessThan": "0fb58aff0dafd6837cc91f4154f3ed6e020358fa", "status": "affected", "versionType": "git"}, {"version": "e234088758fca3a669ebb1a02d8bf7bf60f0e4ff", "lessThan": "2f67ff1e15a8a4d0e4ffc6564ab20d03d7398fe9", "status": "affected", "versionType": "git"}, {"version": "e234088758fca3a669ebb1a02d8bf7bf60f0e4ff", "lessThan": "505e1c0530db6152cab3feef8e3e4da3d3e358c9", "status": "affected", "versionType": "git"}, {"version": "e234088758fca3a669ebb1a02d8bf7bf60f0e4ff", "lessThan": "acc2c97fc0005846e5cf11b5ba3189fef130c9b3", "status": "affected", "versionType": "git"}, {"version": "e234088758fca3a669ebb1a02d8bf7bf60f0e4ff", "lessThan": "cf4a9e1bc8129eb63fda5f8bdcd8d87f0bd76f42", "status": "affected", "versionType": "git"}, {"version": "e234088758fca3a669ebb1a02d8bf7bf60f0e4ff", "lessThan": "995030be4ce6338c6ff814583c14166446a64008", "status": "affected", "versionType": "git"}, {"version": "e234088758fca3a669ebb1a02d8bf7bf60f0e4ff", "lessThan": "a42f99be8a16b32a0bb91bb6dda212a6ad61be5d", "status": "affected", "versionType": "git"}, {"version": "e234088758fca3a669ebb1a02d8bf7bf60f0e4ff", "lessThan": "ce2739e482bce8d2c014d76c4531c877f382aa54", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/f2fs/data.c"], "versions": [{"version": "3.13", "status": "affected"}, {"version": "0", "lessThan": "3.13", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.251", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.201", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.164", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.127", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.74", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.13", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.19.3", "lessThanOrEqual": "6.19.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0-rc1", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.13", "versionEndExcluding": "5.10.251"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.13", "versionEndExcluding": "5.15.201"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.13", "versionEndExcluding": "6.1.164"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.13", "versionEndExcluding": "6.6.127"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.13", "versionEndExcluding": "6.12.74"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.13", "versionEndExcluding": "6.18.13"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.13", "versionEndExcluding": "6.19.3"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.13", "versionEndExcluding": "7.0-rc1"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/0fb58aff0dafd6837cc91f4154f3ed6e020358fa"}, {"url": "https://git.kernel.org/stable/c/2f67ff1e15a8a4d0e4ffc6564ab20d03d7398fe9"}, {"url": "https://git.kernel.org/stable/c/505e1c0530db6152cab3feef8e3e4da3d3e358c9"}, {"url": "https://git.kernel.org/stable/c/acc2c97fc0005846e5cf11b5ba3189fef130c9b3"}, {"url": "https://git.kernel.org/stable/c/cf4a9e1bc8129eb63fda5f8bdcd8d87f0bd76f42"}, {"url": "https://git.kernel.org/stable/c/995030be4ce6338c6ff814583c14166446a64008"}, {"url": "https://git.kernel.org/stable/c/a42f99be8a16b32a0bb91bb6dda212a6ad61be5d"}, {"url": "https://git.kernel.org/stable/c/ce2739e482bce8d2c014d76c4531c877f382aa54"}], "title": "f2fs: fix to avoid UAF in f2fs_write_end_io()", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nf2fs: fix to avoid UAF in f2fs_write_end_io()\n\nAs syzbot reported an use-after-free issue in f2fs_write_end_io().\n\nIt is caused by below race condition:\n\nloop device\t\t\t\tumount\n- worker_thread\n - loop_process_work\n - do_req_filebacked\n - lo_rw_aio\n - lo_rw_aio_complete\n - blk_mq_end_request\n - blk_update_request\n - f2fs_write_end_io\n - dec_page_count\n - folio_end_writeback\n\t\t\t\t\t- kill_f2fs_super\n\t\t\t\t\t - kill_block_super\n\t\t\t\t\t - f2fs_put_super\n\t\t\t\t\t : free(sbi)\n : get_pages(, F2FS_WB_CP_DATA)\n accessed sbi which is freed\n\nIn kill_f2fs_super(), we will drop all page caches of f2fs inodes before\ncall free(sbi), it guarantee that all folios should end its writeback, so\nit should be safe to access sbi before last folio_end_writeback().\n\nLet's relocate ckpt thread wakeup flow before folio_end_writeback() to\nresolve this issue."}], "id": "CVE-2026-23234", "lastModified": "2026-03-04T18:08:05.730", "metrics": {}, "published": "2026-03-04T15:16:13.790", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/0fb58aff0dafd6837cc91f4154f3ed6e020358fa"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/2f67ff1e15a8a4d0e4ffc6564ab20d03d7398fe9"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/505e1c0530db6152cab3feef8e3e4da3d3e358c9"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/995030be4ce6338c6ff814583c14166446a64008"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/a42f99be8a16b32a0bb91bb6dda212a6ad61be5d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/acc2c97fc0005846e5cf11b5ba3189fef130c9b3"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/ce2739e482bce8d2c014d76c4531c877f382aa54"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/cf4a9e1bc8129eb63fda5f8bdcd8d87f0bd76f42"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Awaiting Analysis"}

{}