CVE-2021-47004

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2021-47004", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-02-27T18:42:55.951Z", "datePublished": "2024-02-28T08:13:25.324Z", "dateUpdated": "2026-08-05T08:45:31.112Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T08:45:31.112Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nf2fs: fix to avoid touching checkpointed data in get_victim()\n\nIn CP disabling mode, there are two issues when using LFS or SSR | AT_SSR\nmode to select victim:\n\n1. LFS is set to find source section during GC, the victim should have\nno checkpointed data, since after GC, section could not be set free for\nreuse.\n\nPreviously, we only check valid chpt blocks in current segment rather\nthan section, fix it.\n\n2. SSR | AT_SSR are set to find target segment for writes which can be\nfully filled by checkpointed and newly written blocks, we should never\nselect such segment, otherwise it can cause panic or data corruption\nduring allocation, potential case is described as below:\n\n a) target segment has 'n' (n < 512) ckpt valid blocks\n b) GC migrates 'n' valid blocks to other segment (segment is still\n in dirty list)\n c) GC migrates '512 - n' blocks to target segment (segment has 'n'\n cp_vblocks and '512 - n' vblocks)\n d) If GC selects target segment via {AT,}SSR allocator, however there\n is no free space in targe segment."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H", "baseScore": 7.1, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "value": "AV:L - The bug is in f2fs GC/SSR victim selection and is reached via local filesystem operations (writes triggering f2fs_balance_fs/SSR allocation or the local GC path), not via network packet processing.\nAC:L - With checkpoint disabled, f2fs_need_SSR() always forces SSR and an attacker who can write can drive GC/allocation until a full dirty segment is selected; success does not depend on a race or other attacker-uncontrollable conditions.\nPR:L - Mounting with checkpoint=disable is an admin/deployment precondition, but once that mode is active any unprivileged user with write access triggers the vulnerable get_victim/SSR path through ordinary writes without CAP_SYS_ADMIN.\nUI:N - Exploitation requires only the attacker\u2019s own writes on an already checkpoint-disabled f2fs mount; no separate victim interaction is required.\nS:U - Impact is confined to the local kernel/filesystem authority (panic and filesystem corruption); it does not cross a VM, IOMMU, or other security boundary.\nC:N - The failure is a logic/allocation bug that panics or corrupts filesystem metadata (summary/SIT/block placement); it does not provide an information-disclosure or arbitrary-read primitive.\nI:H - Selecting a full segment for SSR can corrupt on-disk data and metadata during allocation (wrong block reuse and summary/journal corruption), which the fix commit explicitly describes as data corruption.\nA:H - Allocation with next_blkoff >= blocks_per_seg hits f2fs_bug_on (BUG_ON under CONFIG_F2FS_CHECK_FS, otherwise WARN and continued broken state), causing kernel oops/panic or filesystem failure."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/f2fs/f2fs.h", "fs/f2fs/gc.c", "fs/f2fs/segment.c", "fs/f2fs/segment.h"], "versions": [{"version": "4354994f097d068a894aa1a0860da54571df3582", "lessThan": "105155a8146ddb54c119d8318964eef3859d109d", "status": "affected", "versionType": "git"}, {"version": "4354994f097d068a894aa1a0860da54571df3582", "lessThan": "1e116f87825f01a6380286472196882746b16f63", "status": "affected", "versionType": "git"}, {"version": "4354994f097d068a894aa1a0860da54571df3582", "lessThan": "211372b2571520e394b56b431a0705586013b3ff", "status": "affected", "versionType": "git"}, {"version": "4354994f097d068a894aa1a0860da54571df3582", "lessThan": "61461fc921b756ae16e64243f72af2bfc2e620db", "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/f2fs.h", "fs/f2fs/gc.c", "fs/f2fs/segment.c", "fs/f2fs/segment.h"], "versions": [{"version": "4.20", "status": "affected"}, {"version": "0", "lessThan": "4.20", "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": "4.20", "versionEndExcluding": "5.10.38"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.20", "versionEndExcluding": "5.11.22"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.20", "versionEndExcluding": "5.12.5"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.20", "versionEndExcluding": "5.13"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/105155a8146ddb54c119d8318964eef3859d109d"}, {"url": "https://git.kernel.org/stable/c/1e116f87825f01a6380286472196882746b16f63"}, {"url": "https://git.kernel.org/stable/c/211372b2571520e394b56b431a0705586013b3ff"}, {"url": "https://git.kernel.org/stable/c/61461fc921b756ae16e64243f72af2bfc2e620db"}], "title": "f2fs: fix to avoid touching checkpointed data in get_victim()", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-04T05:24:39.238Z"}, "title": "CVE Program Container", "references": [{"url": "https://git.kernel.org/stable/c/105155a8146ddb54c119d8318964eef3859d109d", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/1e116f87825f01a6380286472196882746b16f63", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/211372b2571520e394b56b431a0705586013b3ff", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/61461fc921b756ae16e64243f72af2bfc2e620db", "tags": ["x_transferred"]}]}, {"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2021-47004", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2024-09-10T15:58:19.064167Z"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-09-11T17:33:34.294Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CVE Program Container", "references": [{"url": "https://git.kernel.org/stable/c/105155a8146ddb54c119d8318964eef3859d109d", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/1e116f87825f01a6380286472196882746b16f63", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/211372b2571520e394b56b431a0705586013b3ff", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/61461fc921b756ae16e64243f72af2bfc2e620db", "tags": ["x_transferred"]}], "providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-04T05:24:39.238Z"}}, {"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2021-47004", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2024-09-10T15:58:19.064167Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-09-11T12:42:17.379Z"}}], "cna": {"title": "f2fs: fix to avoid touching checkpointed data in get_victim()", "metrics": [{"cvssV3_1": {"version": "3.1", "baseScore": 7.1, "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H"}, "scenarios": [{"lang": "en", "value": "AV:L - The bug is in f2fs GC/SSR victim selection and is reached via local filesystem operations (writes triggering f2fs_balance_fs/SSR allocation or the local GC path), not via network packet processing.\nAC:L - With checkpoint disabled, f2fs_need_SSR() always forces SSR and an attacker who can write can drive GC/allocation until a full dirty segment is selected; success does not depend on a race or other attacker-uncontrollable conditions.\nPR:L - Mounting with checkpoint=disable is an admin/deployment precondition, but once that mode is active any unprivileged user with write access triggers the vulnerable get_victim/SSR path through ordinary writes without CAP_SYS_ADMIN.\nUI:N - Exploitation requires only the attacker\u2019s own writes on an already checkpoint-disabled f2fs mount; no separate victim interaction is required.\nS:U - Impact is confined to the local kernel/filesystem authority (panic and filesystem corruption); it does not cross a VM, IOMMU, or other security boundary.\nC:N - The failure is a logic/allocation bug that panics or corrupts filesystem metadata (summary/SIT/block placement); it does not provide an information-disclosure or arbitrary-read primitive.\nI:H - Selecting a full segment for SSR can corrupt on-disk data and metadata during allocation (wrong block reuse and summary/journal corruption), which the fix commit explicitly describes as data corruption.\nA:H - Allocation with next_blkoff >= blocks_per_seg hits f2fs_bug_on (BUG_ON under CONFIG_F2FS_CHECK_FS, otherwise WARN and continued broken state), causing kernel oops/panic or filesystem failure."}]}], "affected": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "4354994f097d068a894aa1a0860da54571df3582", "lessThan": "105155a8146ddb54c119d8318964eef3859d109d", "versionType": "git"}, {"status": "affected", "version": "4354994f097d068a894aa1a0860da54571df3582", "lessThan": "1e116f87825f01a6380286472196882746b16f63", "versionType": "git"}, {"status": "affected", "version": "4354994f097d068a894aa1a0860da54571df3582", "lessThan": "211372b2571520e394b56b431a0705586013b3ff", "versionType": "git"}, {"status": "affected", "version": "4354994f097d068a894aa1a0860da54571df3582", "lessThan": "61461fc921b756ae16e64243f72af2bfc2e620db", "versionType": "git"}], "programFiles": ["fs/f2fs/f2fs.h", "fs/f2fs/gc.c", "fs/f2fs/segment.c", "fs/f2fs/segment.h"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "4.20"}, {"status": "unaffected", "version": "0", "lessThan": "4.20", "versionType": "semver"}, {"status": "unaffected", "version": "5.10.38", "versionType": "semver", "lessThanOrEqual": "5.10.*"}, {"status": "unaffected", "version": "5.11.22", "versionType": "semver", "lessThanOrEqual": "5.11.*"}, {"status": "unaffected", "version": "5.12.5", "versionType": "semver", "lessThanOrEqual": "5.12.*"}, {"status": "unaffected", "version": "5.13", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["fs/f2fs/f2fs.h", "fs/f2fs/gc.c", "fs/f2fs/segment.c", "fs/f2fs/segment.h"], "defaultStatus": "affected"}], "references": [{"url": "https://git.kernel.org/stable/c/105155a8146ddb54c119d8318964eef3859d109d"}, {"url": "https://git.kernel.org/stable/c/1e116f87825f01a6380286472196882746b16f63"}, {"url": "https://git.kernel.org/stable/c/211372b2571520e394b56b431a0705586013b3ff"}, {"url": "https://git.kernel.org/stable/c/61461fc921b756ae16e64243f72af2bfc2e620db"}], "x_generator": {"engine": "bippy-1.2.0"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nf2fs: fix to avoid touching checkpointed data in get_victim()\n\nIn CP disabling mode, there are two issues when using LFS or SSR | AT_SSR\nmode to select victim:\n\n1. LFS is set to find source section during GC, the victim should have\nno checkpointed data, since after GC, section could not be set free for\nreuse.\n\nPreviously, we only check valid chpt blocks in current segment rather\nthan section, fix it.\n\n2. SSR | AT_SSR are set to find target segment for writes which can be\nfully filled by checkpointed and newly written blocks, we should never\nselect such segment, otherwise it can cause panic or data corruption\nduring allocation, potential case is described as below:\n\n a) target segment has 'n' (n < 512) ckpt valid blocks\n b) GC migrates 'n' valid blocks to other segment (segment is still\n in dirty list)\n c) GC migrates '512 - n' blocks to target segment (segment has 'n'\n cp_vblocks and '512 - n' vblocks)\n d) If GC selects target segment via {AT,}SSR allocator, however there\n is no free space in targe segment."}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.10.38", "versionStartIncluding": "4.20"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.11.22", "versionStartIncluding": "4.20"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.12.5", "versionStartIncluding": "4.20"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.13", "versionStartIncluding": "4.20"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T08:45:31.112Z"}}}, "cveMetadata": {"cveId": "CVE-2021-47004", "state": "PUBLISHED", "dateUpdated": "2026-08-05T08:45:31.112Z", "dateReserved": "2024-02-27T18:42:55.951Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2024-02-28T08:13:25.324Z", "assignerShortName": "Linux"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["fs/f2fs/f2fs.h", "fs/f2fs/gc.c", "fs/f2fs/segment.c", "fs/f2fs/segment.h"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "105155a8146ddb54c119d8318964eef3859d109d", "status": "affected", "version": "4354994f097d068a894aa1a0860da54571df3582", "versionType": "git"}, {"lessThan": "1e116f87825f01a6380286472196882746b16f63", "status": "affected", "version": "4354994f097d068a894aa1a0860da54571df3582", "versionType": "git"}, {"lessThan": "211372b2571520e394b56b431a0705586013b3ff", "status": "affected", "version": "4354994f097d068a894aa1a0860da54571df3582", "versionType": "git"}, {"lessThan": "61461fc921b756ae16e64243f72af2bfc2e620db", "status": "affected", "version": "4354994f097d068a894aa1a0860da54571df3582", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["fs/f2fs/f2fs.h", "fs/f2fs/gc.c", "fs/f2fs/segment.c", "fs/f2fs/segment.h"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "4.20"}, {"lessThan": "4.20", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "5.10.*", "status": "unaffected", "version": "5.10.38", "versionType": "semver"}, {"lessThanOrEqual": "5.11.*", "status": "unaffected", "version": "5.11.22", "versionType": "semver"}, {"lessThanOrEqual": "5.12.*", "status": "unaffected", "version": "5.12.5", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "5.13", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "7B942F1E-8607-4DB5-90A9-F497E0DCFF88", "versionEndExcluding": "5.10.38", "versionStartIncluding": "4.20", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "83B53E9A-F426-4C03-9A5F-A931FF79827E", "versionEndExcluding": "5.11.22", "versionStartIncluding": "5.11", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "0274929A-B36C-4F4C-AB22-30A0DD6B995B", "versionEndExcluding": "5.12.5", "versionStartIncluding": "5.12", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nf2fs: fix to avoid touching checkpointed data in get_victim()\n\nIn CP disabling mode, there are two issues when using LFS or SSR | AT_SSR\nmode to select victim:\n\n1. LFS is set to find source section during GC, the victim should have\nno checkpointed data, since after GC, section could not be set free for\nreuse.\n\nPreviously, we only check valid chpt blocks in current segment rather\nthan section, fix it.\n\n2. SSR | AT_SSR are set to find target segment for writes which can be\nfully filled by checkpointed and newly written blocks, we should never\nselect such segment, otherwise it can cause panic or data corruption\nduring allocation, potential case is described as below:\n\n a) target segment has 'n' (n < 512) ckpt valid blocks\n b) GC migrates 'n' valid blocks to other segment (segment is still\n in dirty list)\n c) GC migrates '512 - n' blocks to target segment (segment has 'n'\n cp_vblocks and '512 - n' vblocks)\n d) If GC selects target segment via {AT,}SSR allocator, however there\n is no free space in targe segment."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: f2fs: correcci\u00f3n para evitar tocar datos con puntos de control en get_victim() En el modo de desactivaci\u00f3n de CP, hay dos problemas al usar LFS o SSR | Modo AT_SSR para seleccionar a la v\u00edctima: 1. LFS est\u00e1 configurado para buscar la secci\u00f3n de origen durante la GC, la v\u00edctima no debe tener datos de puntos de control, ya que despu\u00e9s de la GC, la secci\u00f3n no se puede liberar para su reutilizaci\u00f3n. Anteriormente, solo verific\u00e1bamos los bloques chpt v\u00e1lidos en el segmento actual en lugar de en la secci\u00f3n, lo arreglamos. 2. RSS | AT_SSR est\u00e1 configurado para encontrar un segmento de destino para escrituras que se puede llenar completamente con bloques reci\u00e9n escritos y con puntos de control. Nunca debemos seleccionar dicho segmento; de lo contrario, puede causar p\u00e1nico o corrupci\u00f3n de datos durante la asignaci\u00f3n. El caso potencial se describe a continuaci\u00f3n: a) segmento de destino tiene 'n' (n &lt; 512) ckpt bloques v\u00e1lidos b) GC migra 'n' bloques v\u00e1lidos a otro segmento (el segmento todav\u00eda est\u00e1 en la lista sucia) c) GC migra '512 - n' bloques al segmento objetivo (el segmento tiene 'n ' cp_vblocks y '512 - n' vblocks) d) Si GC selecciona el segmento de destino mediante el asignador {AT,}SSR, sin embargo, no hay espacio libre en el segmento de destino."}], "id": "CVE-2021-47004", "lastModified": "2026-08-04T10:16:41.073", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.1, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.2, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.1, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.2, "source": "nvd@nist.gov", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2021-47004", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2024-09-10T15:58:19.064167Z", "version": "2.0.3"}}]}, "published": "2024-02-28T09:15:38.353", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/105155a8146ddb54c119d8318964eef3859d109d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/1e116f87825f01a6380286472196882746b16f63"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/211372b2571520e394b56b431a0705586013b3ff"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/61461fc921b756ae16e64243f72af2bfc2e620db"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/105155a8146ddb54c119d8318964eef3859d109d"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/1e116f87825f01a6380286472196882746b16f63"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/211372b2571520e394b56b431a0705586013b3ff"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/61461fc921b756ae16e64243f72af2bfc2e620db"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "NVD-CWE-noinfo"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: f2fs: fix to avoid touching checkpointed data in get_victim()", "id": "2266863", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2266863"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-20", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nf2fs: fix to avoid touching checkpointed data in get_victim()\nIn CP disabling mode, there are two issues when using LFS or SSR | AT_SSR\nmode to select victim:\n1. LFS is set to find source section during GC, the victim should have\nno checkpointed data, since after GC, section could not be set free for\nreuse.\nPreviously, we only check valid chpt blocks in current segment rather\nthan section, fix it.\n2. SSR | AT_SSR are set to find target segment for writes which can be\nfully filled by checkpointed and newly written blocks, we should never\nselect such segment, otherwise it can cause panic or data corruption\nduring allocation, potential case is described as below:\na) target segment has 'n' (n < 512) ckpt valid blocks\nb) GC migrates 'n' valid blocks to other segment (segment is still\nin dirty list)\nc) GC migrates '512 - n' blocks to target segment (segment has 'n'\ncp_vblocks and '512 - n' vblocks)\nd) If GC selects target segment via {AT,}SSR allocator, however there\nis no free space in targe segment."], "name": "CVE-2021-47004", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2024-02-28T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2021-47004\nhttps://nvd.nist.gov/vuln/detail/CVE-2021-47004\nhttps://lore.kernel.org/linux-cve-announce/2024022829-CVE-2021-47004-8544@gregkh/T/#u"], "threat_severity": "Moderate"}

{}