{"dataType":"CVE_RECORD","dataVersion":"5.1","cveMetadata":{"cveId":"CVE-2021-47007","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2024-02-27T18:42:55.952Z","datePublished":"2024-02-28T08:13:27.159Z","dateUpdated":"2025-05-04T07:02:11.875Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2025-05-04T07:02:11.875Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nf2fs: fix panic during f2fs_resize_fs()\n\nf2fs_resize_fs() hangs in below callstack with testcase:\n- mkfs 16GB image & mount image\n- dd 8GB fileA\n- dd 8GB fileB\n- sync\n- rm fileA\n- sync\n- resize filesystem to 8GB\n\nkernel BUG at segment.c:2484!\nCall Trace:\n allocate_segment_by_default+0x92/0xf0 [f2fs]\n f2fs_allocate_data_block+0x44b/0x7e0 [f2fs]\n do_write_page+0x5a/0x110 [f2fs]\n f2fs_outplace_write_data+0x55/0x100 [f2fs]\n f2fs_do_write_data_page+0x392/0x850 [f2fs]\n move_data_page+0x233/0x320 [f2fs]\n do_garbage_collect+0x14d9/0x1660 [f2fs]\n free_segment_range+0x1f7/0x310 [f2fs]\n f2fs_resize_fs+0x118/0x330 [f2fs]\n __f2fs_ioctl+0x487/0x3680 [f2fs]\n __x64_sys_ioctl+0x8e/0xd0\n do_syscall_64+0x33/0x80\n entry_SYSCALL_64_after_hwframe+0x44/0xa9\n\nThe root cause is we forgot to check that whether we have enough space\nin resized filesystem to store all valid blocks in before-resizing\nfilesystem, then allocator will run out-of-space during block migration\nin free_segment_range()."}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/f2fs/gc.c"],"versions":[{"version":"b4b10061ef98c583bcf82a4200703fbaa98c18dc","lessThan":"1c20a4896409f5ca1c770e1880c33d0a28a8b10f","status":"affected","versionType":"git"},{"version":"b4b10061ef98c583bcf82a4200703fbaa98c18dc","lessThan":"860afd680d9cc1dabd61cda3cd246f60aa1eb705","status":"affected","versionType":"git"},{"version":"b4b10061ef98c583bcf82a4200703fbaa98c18dc","lessThan":"822054e5026c43b1dd60cf387dd999e95ee2ecc2","status":"affected","versionType":"git"},{"version":"b4b10061ef98c583bcf82a4200703fbaa98c18dc","lessThan":"3ab0598e6d860ef49d029943ba80f627c15c15d6","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/gc.c"],"versions":[{"version":"5.8","status":"affected"},{"version":"0","lessThan":"5.8","status":"unaffected","versionType":"semver"},{"version":"5.10.38","lessThanOrEqual":"5.10.*","status":"unaffected","versionType":"semver"},{"version":"5.11.22","lessThanOrEqual":"5.11.*","status":"unaffected","versionType":"semver"},{"version":"5.12.5","lessThanOrEqual":"5.12.*","status":"unaffected","versionType":"semver"},{"version":"5.13","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":"5.8","versionEndExcluding":"5.10.38"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.8","versionEndExcluding":"5.11.22"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.8","versionEndExcluding":"5.12.5"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.8","versionEndExcluding":"5.13"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/1c20a4896409f5ca1c770e1880c33d0a28a8b10f"},{"url":"https://git.kernel.org/stable/c/860afd680d9cc1dabd61cda3cd246f60aa1eb705"},{"url":"https://git.kernel.org/stable/c/822054e5026c43b1dd60cf387dd999e95ee2ecc2"},{"url":"https://git.kernel.org/stable/c/3ab0598e6d860ef49d029943ba80f627c15c15d6"}],"title":"f2fs: fix panic during f2fs_resize_fs()","x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2021-47007","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"version":"2.0.3","timestamp":"2024-02-28T21:09:48.777385Z"}}}],"providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2024-06-04T17:15:16.302Z"}},{"providerMetadata":{"orgId":"af854a3a-2127-422b-91ae-364da2661108","shortName":"CVE","dateUpdated":"2024-08-04T05:24:39.335Z"},"title":"CVE Program Container","references":[{"url":"https://git.kernel.org/stable/c/1c20a4896409f5ca1c770e1880c33d0a28a8b10f","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/860afd680d9cc1dabd61cda3cd246f60aa1eb705","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/822054e5026c43b1dd60cf387dd999e95ee2ecc2","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/3ab0598e6d860ef49d029943ba80f627c15c15d6","tags":["x_transferred"]}]}]}}