{ "schemaVersion": 1, "attribution": [ { "source": "CISA Known Exploited Vulnerabilities", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog", "licence": "US government work" }, { "source": "GitHub Advisory Database", "url": "https://github.com/advisories", "licence": "CC BY 4.0" }, { "source": "Have I Been Pwned", "url": "https://haveibeenpwned.com/", "licence": "CC BY 4.0" }, { "source": "CVE Program (CVE records)", "url": "https://www.cve.org/Legal/TermsOfUse", "licence": "CVE Terms of Use", "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.", "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy." }, { "source": "FIRST EPSS", "url": "https://www.first.org/epss/", "licence": "free to use; FIRST requests attribution" } ], "record": { "id": "CVE-2021-47145", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2021-47145", "idYear": 2021, "status": "PUBLISHED", "publishedAt": "2024-03-25T09:07:42.384Z", "updatedAt": "2026-05-11T13:48:54.208Z", "importedAt": "2026-10-24T01:56:36.661Z", "snapshot": { "id": "cve_2026-10-24_midnight_baseline", "at": "2026-10-24T00:00:00.000Z", "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z" }, "facts": { "title": "btrfs: do not BUG_ON in link_to_fixup_dir", "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: do not BUG_ON in link_to_fixup_dir\n\nWhile doing error injection testing I got the following panic\n\n kernel BUG at fs/btrfs/tree-log.c:1862!\n invalid opcode: 0000 [#1] SMP NOPTI\n CPU: 1 PID: 7836 Comm: mount Not tainted 5.13.0-rc1+ #305\n Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.13.0-2.fc32 04/01/2014\n RIP: 0010:link_to_fixup_dir+0xd5/0xe0\n RSP: 0018:ffffb5800180fa30 EFLAGS: 00010216\n RAX: fffffffffffffffb RBX: 00000000fffffffb RCX: ffff8f595287faf0\n RDX: ffffb5800180fa37 RSI: ffff8f5954978800 RDI: 0000000000000000\n RBP: ffff8f5953af9450 R08: 0000000000000019 R09: 0000000000000001\n R10: 000151f408682970 R11: 0000000120021001 R12: ffff8f5954978800\n R13: ffff8f595287faf0 R14: ffff8f5953c77dd0 R15: 0000000000000065\n FS: 00007fc5284c8c40(0000) GS:ffff8f59bbd00000(0000) knlGS:0000000000000000\n CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n CR2: 00007fc5287f47c0 CR3: 000000011275e002 CR4: 0000000000370ee0\n Call Trace:\n replay_one_buffer+0x409/0x470\n ? btree_read_extent_buffer_pages+0xd0/0x110\n walk_up_log_tree+0x157/0x1e0\n walk_log_tree+0xa6/0x1d0\n btrfs_recover_log_trees+0x1da/0x360\n ? replay_one_extent+0x7b0/0x7b0\n open_ctree+0x1486/0x1720\n btrfs_mount_root.cold+0x12/0xea\n ? __kmalloc_track_caller+0x12f/0x240\n legacy_get_tree+0x24/0x40\n vfs_get_tree+0x22/0xb0\n vfs_kern_mount.part.0+0x71/0xb0\n btrfs_mount+0x10d/0x380\n ? vfs_parse_fs_string+0x4d/0x90\n legacy_get_tree+0x24/0x40\n vfs_get_tree+0x22/0xb0\n path_mount+0x433/0xa10\n __x64_sys_mount+0xe3/0x120\n do_syscall_64+0x3d/0x80\n entry_SYSCALL_64_after_hwframe+0x44/0xae\n\nWe can get -EIO or any number of legitimate errors from\nbtrfs_search_slot(), panicing here is not the appropriate response. The\nerror path for this code handles errors properly, simply return the\nerror.", "affected": [ { "vendor": "Linux", "product": "Linux", "defaultStatus": "unaffected", "versions": [ { "version": "e02119d5a7b4396c5a872582fddc8bd6d305a70a", "status": "affected", "versionType": "git", "lessThan": "76bfd8ac20bebeae599452a03dfc5724c0475dcf" }, { "version": "e02119d5a7b4396c5a872582fddc8bd6d305a70a", "status": "affected", "versionType": "git", "lessThan": "e934c4ee17b33bafb0444f2f9766cda7166d3c40" }, { "version": "e02119d5a7b4396c5a872582fddc8bd6d305a70a", "status": "affected", "versionType": "git", "lessThan": "0eaf383c6a4a83c09f60fd07a1bea9f1a9181611" }, { "version": "e02119d5a7b4396c5a872582fddc8bd6d305a70a", "status": "affected", "versionType": "git", "lessThan": "6eccfb28f8dca70c9b1b3bb3194ca54cbe73a9fa" }, { "version": "e02119d5a7b4396c5a872582fddc8bd6d305a70a", "status": "affected", "versionType": "git", "lessThan": "0ed102453aa1cd12fefde8f6b60b9519b0b1f003" }, { "version": "e02119d5a7b4396c5a872582fddc8bd6d305a70a", "status": "affected", "versionType": "git", "lessThan": "7e13db503918820e6333811cdc6f151dcea5090a" }, { "version": "e02119d5a7b4396c5a872582fddc8bd6d305a70a", "status": "affected", "versionType": "git", "lessThan": "b545442133580dcb2f2496133bf850824d41255c" }, { "version": "e02119d5a7b4396c5a872582fddc8bd6d305a70a", "status": "affected", "versionType": "git", "lessThan": "91df99a6eb50d5a1bc70fff4a09a0b7ae6aab96d" } ] }, { "vendor": "Linux", "product": "Linux", "defaultStatus": "affected", "versions": [ { "version": "2.6.29", "status": "affected" }, { "version": "0", "status": "unaffected", "versionType": "semver", "lessThan": "2.6.29" }, { "version": "4.4.271", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "4.4.*" }, { "version": "4.9.271", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "4.9.*" }, { "version": "4.14.235", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "4.14.*" }, { "version": "4.19.193", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "4.19.*" }, { "version": "5.4.124", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.4.*" }, { "version": "5.10.42", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.10.*" }, { "version": "5.12.9", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.12.*" }, { "version": "5.13", "status": "unaffected", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*" } ] } ] } } }