CVE-2023-52852

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do_mem_abort+0x3a8/0x1004\n el0_da+0x3c/0xa0\n el0t_64_sync_handler+0xc4/0xec\n el0t_64_sync+0x1b4/0x1b8\n\nIn f2fs_read_multi_pages(), once f2fs_decompress_cluster() was called if\nwe hit cached page in compress_inode's cache, dic may be released, it needs\nbreak the loop rather than continuing it, in order to avoid accessing\ninvalid dic pointer."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "value": "AV:L - The UAF is reached via local VFS read/mmap fault \u2192 f2fs_readahead \u2192 f2fs_mpage_readpages \u2192 f2fs_read_multi_pages on a compression-enabled f2fs inode; no network or adjacent protocol handler exercises this path.\nAC:L - An unprivileged attacker can reliably prime compress_inode cache (read compressed data, then posix_fadvise/DONTNEED or reclaim pagecache) and re-fault so f2fs_load_compressed_page hits and frees dic; no condition outside attacker control is required on Android deployments that already mount with compress_cache.\nPR:L - Only an unprivileged local account with read access to a compressed f2fs file is needed (e.g. an app mmapping its own compress_extension=apk file on Android /data); no capabilities are checked on the fault/readahead path.\nUI:N - The attacker triggers the bug themselves by reading/mmapping their own compressed file on an already-mounted f2fs volume; no separate victim action is required.\nS:U - Impact is confined to the host kernel heap and f2fs pagecache under the same security authority; this is standard kernel privilege escalation with no VM/IOMMU/sandbox boundary crossed.\nC:H - Use-after-free of decompress_io_ctx (and its cpages) after f2fs_decompress_cluster frees dic enables heap reuse and arbitrary kernel read primitives per UAF scoring guidance.\nI:H - Continuing the loop after dic is freed yields UAF writes (including memcpy into reclaimed cpage memory), enabling heap spray and control-flow hijack primitives typical of kernel UAFs.\nA:H - The reported call trace is a kernel fault in __memcpy while touching the freed dic/cpages path, so the bug causes oops/panic even when not fully exploited."}]}], "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": "6ce19aff0b8cd386860855185c6cd79337fc4d2b", "lessThan": "8c4504cc0c64862740a6acb301e0cfa59580dbc5", "status": "affected", "versionType": "git"}, {"version": "6ce19aff0b8cd386860855185c6cd79337fc4d2b", "lessThan": "9375ea7f269093d7c884857ae1f47633a91f429c", "status": "affected", "versionType": "git"}, {"version": "6ce19aff0b8cd386860855185c6cd79337fc4d2b", "lessThan": "932ddb5c29e884cc6fac20417ece72ba4a35c401", "status": "affected", "versionType": "git"}, {"version": "6ce19aff0b8cd386860855185c6cd79337fc4d2b", "lessThan": 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"version": "2.0.3", "timestamp": "2024-05-29T17:16:38.626939Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-05-29T17:16:42.576Z"}, "title": "CISA ADP Vulnrichment"}], "cna": {"title": "f2fs: compress: fix to avoid use-after-free on dic", "metrics": [{"cvssV3_1": {"version": "3.1", "baseScore": 7.8, "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"}, "scenarios": [{"lang": "en", "value": "AV:L - The UAF is reached via local VFS read/mmap fault \u2192 f2fs_readahead \u2192 f2fs_mpage_readpages \u2192 f2fs_read_multi_pages on a compression-enabled f2fs inode; no network or adjacent protocol handler exercises this path.\nAC:L - An unprivileged attacker can reliably prime compress_inode cache (read compressed data, then posix_fadvise/DONTNEED or reclaim pagecache) and re-fault so f2fs_load_compressed_page hits and frees dic; no condition outside attacker control is required on Android deployments that already mount with compress_cache.\nPR:L - Only an unprivileged local account with read access to a compressed f2fs file is needed (e.g. an app mmapping its own compress_extension=apk file on Android /data); no capabilities are checked on the fault/readahead path.\nUI:N - The attacker triggers the bug themselves by reading/mmapping their own compressed file on an already-mounted f2fs volume; no separate victim action is required.\nS:U - Impact is confined to the host kernel heap and f2fs pagecache under the same security authority; this is standard kernel privilege escalation with no VM/IOMMU/sandbox boundary crossed.\nC:H - Use-after-free of decompress_io_ctx (and its cpages) after f2fs_decompress_cluster frees dic enables heap reuse and arbitrary kernel read primitives per UAF scoring guidance.\nI:H - Continuing the loop after dic is freed yields UAF writes (including memcpy into reclaimed cpage memory), enabling heap spray and control-flow hijack primitives typical of kernel UAFs.\nA:H - The reported call trace is a kernel fault in __memcpy while touching the freed dic/cpages path, so the bug causes oops/panic even when not fully exploited."}]}], "affected": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "6ce19aff0b8cd386860855185c6cd79337fc4d2b", "lessThan": "8c4504cc0c64862740a6acb301e0cfa59580dbc5", "versionType": "git"}, {"status": "affected", "version": "6ce19aff0b8cd386860855185c6cd79337fc4d2b", "lessThan": "9375ea7f269093d7c884857ae1f47633a91f429c", "versionType": "git"}, {"status": "affected", "version": "6ce19aff0b8cd386860855185c6cd79337fc4d2b", "lessThan": "932ddb5c29e884cc6fac20417ece72ba4a35c401", "versionType": "git"}, {"status": "affected", "version": "6ce19aff0b8cd386860855185c6cd79337fc4d2b", "lessThan": "9d065aa52b6ee1b06f9c4eca881c9b4425a12ba2", "versionType": "git"}, {"status": "affected", "version": 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"versionType": "semver", "lessThanOrEqual": "6.6.*"}, {"status": "unaffected", "version": "6.7", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["fs/f2fs/data.c"], "defaultStatus": "affected"}], "references": [{"url": "https://git.kernel.org/stable/c/8c4504cc0c64862740a6acb301e0cfa59580dbc5"}, {"url": "https://git.kernel.org/stable/c/9375ea7f269093d7c884857ae1f47633a91f429c"}, {"url": "https://git.kernel.org/stable/c/932ddb5c29e884cc6fac20417ece72ba4a35c401"}, {"url": "https://git.kernel.org/stable/c/9d065aa52b6ee1b06f9c4eca881c9b4425a12ba2"}, {"url": "https://git.kernel.org/stable/c/b0327c84e91a0f4f0abced8cb83ec86a7083f086"}], "x_generator": {"engine": "bippy-1.2.0"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nf2fs: compress: fix to avoid use-after-free on dic\n\nCall trace:\n __memcpy+0x128/0x250\n f2fs_read_multi_pages+0x940/0xf7c\n f2fs_mpage_readpages+0x5a8/0x624\n f2fs_readahead+0x5c/0x110\n page_cache_ra_unbounded+0x1b8/0x590\n do_sync_mmap_readahead+0x1dc/0x2e4\n filemap_fault+0x254/0xa8c\n f2fs_filemap_fault+0x2c/0x104\n __do_fault+0x7c/0x238\n do_handle_mm_fault+0x11bc/0x2d14\n do_mem_abort+0x3a8/0x1004\n el0_da+0x3c/0xa0\n el0t_64_sync_handler+0xc4/0xec\n el0t_64_sync+0x1b4/0x1b8\n\nIn f2fs_read_multi_pages(), once f2fs_decompress_cluster() was called if\nwe hit cached page in compress_inode's cache, dic may be released, it needs\nbreak the loop rather than continuing it, in order to avoid accessing\ninvalid dic pointer."}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.15.139", "versionStartIncluding": "5.14"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.1.63", "versionStartIncluding": "5.14"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", 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{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["fs/f2fs/data.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "8c4504cc0c64862740a6acb301e0cfa59580dbc5", "status": "affected", "version": "6ce19aff0b8cd386860855185c6cd79337fc4d2b", "versionType": "git"}, {"lessThan": "9375ea7f269093d7c884857ae1f47633a91f429c", "status": "affected", "version": "6ce19aff0b8cd386860855185c6cd79337fc4d2b", "versionType": "git"}, {"lessThan": "932ddb5c29e884cc6fac20417ece72ba4a35c401", "status": "affected", "version": "6ce19aff0b8cd386860855185c6cd79337fc4d2b", "versionType": "git"}, {"lessThan": "9d065aa52b6ee1b06f9c4eca881c9b4425a12ba2", "status": "affected", "version": "6ce19aff0b8cd386860855185c6cd79337fc4d2b", "versionType": "git"}, {"lessThan": "b0327c84e91a0f4f0abced8cb83ec86a7083f086", "status": "affected", "version": "6ce19aff0b8cd386860855185c6cd79337fc4d2b", "versionType": "git"}, {"status": "affected", "version": "a23706426da9b611be5beae0f3faa260fb453b4e", "versionType": "git"}, {"lessThan": "5.14", "status": "affected", "version": "5.13.19", "versionType": "semver"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["fs/f2fs/data.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "5.14"}, {"lessThan": "5.14", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.139", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.63", "versionType": "semver"}, {"lessThanOrEqual": "6.5.*", "status": "unaffected", "version": "6.5.12", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.2", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "6.7", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "14D5B2E5-AF57-4541-ADEB-69F278C2C058", "versionEndExcluding": "5.15.139", "versionStartIncluding": "5.13.19", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "80E1EA7E-2788-466C-9FFB-34AFA1B052F0", "versionEndExcluding": "6.1.63", "versionStartIncluding": "5.16", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "825F64D9-E99F-49AA-8A7B-EF7C2965C5B2", "versionEndExcluding": "6.5.12", "versionStartIncluding": "6.2", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "4CBFF885-A4D3-4F21-B6FD-4D770034C048", "versionEndExcluding": "6.6.2", "versionStartIncluding": "6.6", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nf2fs: compress: fix to avoid use-after-free on dic\n\nCall trace:\n __memcpy+0x128/0x250\n f2fs_read_multi_pages+0x940/0xf7c\n f2fs_mpage_readpages+0x5a8/0x624\n f2fs_readahead+0x5c/0x110\n page_cache_ra_unbounded+0x1b8/0x590\n do_sync_mmap_readahead+0x1dc/0x2e4\n filemap_fault+0x254/0xa8c\n f2fs_filemap_fault+0x2c/0x104\n __do_fault+0x7c/0x238\n do_handle_mm_fault+0x11bc/0x2d14\n do_mem_abort+0x3a8/0x1004\n el0_da+0x3c/0xa0\n el0t_64_sync_handler+0xc4/0xec\n el0t_64_sync+0x1b4/0x1b8\n\nIn f2fs_read_multi_pages(), once f2fs_decompress_cluster() was called if\nwe hit cached page in compress_inode's cache, dic may be released, it needs\nbreak the loop rather than continuing it, in order to avoid accessing\ninvalid dic pointer."}, {"lang": "es", "value": " En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: f2fs: compress: correcci\u00f3n para evitar el use after free en dic. Rastreo de llamadas: __memcpy+0x128/0x250 f2fs_read_multi_pages+0x940/0xf7c f2fs_mpage_readpages+0x5a8/0x624 f2fs_readahead+0x5c/0x110 page_cache_ra_ ilimitado +0x1b8/0x590 do_sync_mmap_readahead+0x1dc/0x2e4 filemap_fault+0x254/0xa8c f2fs_filemap_fault+0x2c/0x104 __do_fault+0x7c/0x238 do_handle_mm_fault+0x11bc/0x2d14 do_mem_abort+0x3a8 /0x1004 el0_da+0x3c/0xa0 el0t_64_sync_handler+0xc4/0xec el0t_64_sync+0x1b4/0x1b8 En f2fs_read_multi_pages(), una vez que se llam\u00f3 a f2fs_decompress_cluster() si llegamos a la p\u00e1gina almacenada en cach\u00e9 en el cach\u00e9 de compress_inode, es posible que se libere dic, es necesario romper el ciclo en lugar de continuarlo, para evitar acceder a un puntero dic no v\u00e1lido."}], "id": "CVE-2023-52852", "lastModified": "2026-08-04T10:18:46.193", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "nvd@nist.gov", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2023-52852", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2024-05-29T17:16:38.626939Z", "version": "2.0.3"}}]}, "published": "2024-05-21T16:15:22.227", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/8c4504cc0c64862740a6acb301e0cfa59580dbc5"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/932ddb5c29e884cc6fac20417ece72ba4a35c401"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/9375ea7f269093d7c884857ae1f47633a91f429c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/9d065aa52b6ee1b06f9c4eca881c9b4425a12ba2"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/b0327c84e91a0f4f0abced8cb83ec86a7083f086"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/8c4504cc0c64862740a6acb301e0cfa59580dbc5"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/932ddb5c29e884cc6fac20417ece72ba4a35c401"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/9375ea7f269093d7c884857ae1f47633a91f429c"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/9d065aa52b6ee1b06f9c4eca881c9b4425a12ba2"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/b0327c84e91a0f4f0abced8cb83ec86a7083f086"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-416"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: f2fs: compress: fix to avoid use-after-free on dic", "id": "2282747", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2282747"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.1", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H", "status": "draft"}, "cwe": "CWE-416", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nf2fs: compress: fix to avoid use-after-free on dic\nCall trace:\n__memcpy+0x128/0x250\nf2fs_read_multi_pages+0x940/0xf7c\nf2fs_mpage_readpages+0x5a8/0x624\nf2fs_readahead+0x5c/0x110\npage_cache_ra_unbounded+0x1b8/0x590\ndo_sync_mmap_readahead+0x1dc/0x2e4\nfilemap_fault+0x254/0xa8c\nf2fs_filemap_fault+0x2c/0x104\n__do_fault+0x7c/0x238\ndo_handle_mm_fault+0x11bc/0x2d14\ndo_mem_abort+0x3a8/0x1004\nel0_da+0x3c/0xa0\nel0t_64_sync_handler+0xc4/0xec\nel0t_64_sync+0x1b4/0x1b8\nIn f2fs_read_multi_pages(), once f2fs_decompress_cluster() was called if\nwe hit cached page in compress_inode's cache, dic may be released, it needs\nbreak the loop rather than continuing it, in order to avoid accessing\ninvalid dic pointer."], "name": "CVE-2023-52852", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "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": "2024-05-21T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2023-52852\nhttps://nvd.nist.gov/vuln/detail/CVE-2023-52852\nhttps://lore.kernel.org/linux-cve-announce/2024052114-CVE-2023-52852-e55a@gregkh/T"], "threat_severity": "Moderate"}

{}