CVE-2024-44941 (GCVE-0-2024-44941)
Vulnerability from cvelistv5
Published
2024-08-26 11:20
Modified
2025-07-11 17:20
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: f2fs: fix to cover read extent cache access with lock syzbot reports a f2fs bug as below: BUG: KASAN: slab-use-after-free in sanity_check_extent_cache+0x370/0x410 fs/f2fs/extent_cache.c:46 Read of size 4 at addr ffff8880739ab220 by task syz-executor200/5097 CPU: 0 PID: 5097 Comm: syz-executor200 Not tainted 6.9.0-rc6-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 Call Trace: <TASK> __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:114 print_address_description mm/kasan/report.c:377 [inline] print_report+0x169/0x550 mm/kasan/report.c:488 kasan_report+0x143/0x180 mm/kasan/report.c:601 sanity_check_extent_cache+0x370/0x410 fs/f2fs/extent_cache.c:46 do_read_inode fs/f2fs/inode.c:509 [inline] f2fs_iget+0x33e1/0x46e0 fs/f2fs/inode.c:560 f2fs_nfs_get_inode+0x74/0x100 fs/f2fs/super.c:3237 generic_fh_to_dentry+0x9f/0xf0 fs/libfs.c:1413 exportfs_decode_fh_raw+0x152/0x5f0 fs/exportfs/expfs.c:444 exportfs_decode_fh+0x3c/0x80 fs/exportfs/expfs.c:584 do_handle_to_path fs/fhandle.c:155 [inline] handle_to_path fs/fhandle.c:210 [inline] do_handle_open+0x495/0x650 fs/fhandle.c:226 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f We missed to cover sanity_check_extent_cache() w/ extent cache lock, so, below race case may happen, result in use after free issue. - f2fs_iget - do_read_inode - f2fs_init_read_extent_tree : add largest extent entry in to cache - shrink - f2fs_shrink_read_extent_tree - __shrink_extent_tree - __detach_extent_node : drop largest extent entry - sanity_check_extent_cache : access et->largest w/o lock let's refactor sanity_check_extent_cache() to avoid extent cache access and call it before f2fs_init_read_extent_tree() to fix this issue.
References
Impacted products
Vendor Product Version
Linux Linux Version: 98e4da8ca301e062d79ae168c67e56f3c3de3ce4
Version: 98e4da8ca301e062d79ae168c67e56f3c3de3ce4
Version: 98e4da8ca301e062d79ae168c67e56f3c3de3ce4
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nf2fs: fix to cover read extent cache access with lock\n\nsyzbot reports a f2fs bug as below:\n\nBUG: KASAN: slab-use-after-free in sanity_check_extent_cache+0x370/0x410 fs/f2fs/extent_cache.c:46\nRead of size 4 at addr ffff8880739ab220 by task syz-executor200/5097\n\nCPU: 0 PID: 5097 Comm: syz-executor200 Not tainted 6.9.0-rc6-syzkaller #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024\nCall Trace:\n \u003cTASK\u003e\n __dump_stack lib/dump_stack.c:88 [inline]\n dump_stack_lvl+0x241/0x360 lib/dump_stack.c:114\n print_address_description mm/kasan/report.c:377 [inline]\n print_report+0x169/0x550 mm/kasan/report.c:488\n kasan_report+0x143/0x180 mm/kasan/report.c:601\n sanity_check_extent_cache+0x370/0x410 fs/f2fs/extent_cache.c:46\n do_read_inode fs/f2fs/inode.c:509 [inline]\n f2fs_iget+0x33e1/0x46e0 fs/f2fs/inode.c:560\n f2fs_nfs_get_inode+0x74/0x100 fs/f2fs/super.c:3237\n generic_fh_to_dentry+0x9f/0xf0 fs/libfs.c:1413\n exportfs_decode_fh_raw+0x152/0x5f0 fs/exportfs/expfs.c:444\n exportfs_decode_fh+0x3c/0x80 fs/exportfs/expfs.c:584\n do_handle_to_path fs/fhandle.c:155 [inline]\n handle_to_path fs/fhandle.c:210 [inline]\n do_handle_open+0x495/0x650 fs/fhandle.c:226\n do_syscall_x64 arch/x86/entry/common.c:52 [inline]\n do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\n\nWe missed to cover sanity_check_extent_cache() w/ extent cache lock,\nso, below race case may happen, result in use after free issue.\n\n- f2fs_iget\n - do_read_inode\n  - f2fs_init_read_extent_tree\n  : add largest extent entry in to cache\n\t\t\t\t\t- shrink\n\t\t\t\t\t - f2fs_shrink_read_extent_tree\n\t\t\t\t\t  - __shrink_extent_tree\n\t\t\t\t\t   - __detach_extent_node\n\t\t\t\t\t   : drop largest extent entry\n  - sanity_check_extent_cache\n  : access et-\u003elargest w/o lock\n\nlet\u0027s refactor sanity_check_extent_cache() to avoid extent cache access\nand call it before f2fs_init_read_extent_tree() to fix this issue."
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    "nvd": "{\"cve\":{\"id\":\"CVE-2024-44941\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-08-26T12:15:06.107\",\"lastModified\":\"2024-09-12T20:57:26.143\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nf2fs: fix to cover read extent cache access with lock\\n\\nsyzbot reports a f2fs bug as below:\\n\\nBUG: KASAN: slab-use-after-free in sanity_check_extent_cache+0x370/0x410 fs/f2fs/extent_cache.c:46\\nRead of size 4 at addr ffff8880739ab220 by task syz-executor200/5097\\n\\nCPU: 0 PID: 5097 Comm: syz-executor200 Not tainted 6.9.0-rc6-syzkaller #0\\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024\\nCall Trace:\\n \u003cTASK\u003e\\n __dump_stack lib/dump_stack.c:88 [inline]\\n dump_stack_lvl+0x241/0x360 lib/dump_stack.c:114\\n print_address_description mm/kasan/report.c:377 [inline]\\n print_report+0x169/0x550 mm/kasan/report.c:488\\n kasan_report+0x143/0x180 mm/kasan/report.c:601\\n sanity_check_extent_cache+0x370/0x410 fs/f2fs/extent_cache.c:46\\n do_read_inode fs/f2fs/inode.c:509 [inline]\\n f2fs_iget+0x33e1/0x46e0 fs/f2fs/inode.c:560\\n f2fs_nfs_get_inode+0x74/0x100 fs/f2fs/super.c:3237\\n generic_fh_to_dentry+0x9f/0xf0 fs/libfs.c:1413\\n exportfs_decode_fh_raw+0x152/0x5f0 fs/exportfs/expfs.c:444\\n exportfs_decode_fh+0x3c/0x80 fs/exportfs/expfs.c:584\\n do_handle_to_path fs/fhandle.c:155 [inline]\\n handle_to_path fs/fhandle.c:210 [inline]\\n do_handle_open+0x495/0x650 fs/fhandle.c:226\\n do_syscall_x64 arch/x86/entry/common.c:52 [inline]\\n do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83\\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\\n\\nWe missed to cover sanity_check_extent_cache() w/ extent cache lock,\\nso, below race case may happen, result in use after free issue.\\n\\n- f2fs_iget\\n - do_read_inode\\n  - f2fs_init_read_extent_tree\\n  : add largest extent entry in to cache\\n\\t\\t\\t\\t\\t- shrink\\n\\t\\t\\t\\t\\t - f2fs_shrink_read_extent_tree\\n\\t\\t\\t\\t\\t  - __shrink_extent_tree\\n\\t\\t\\t\\t\\t   - __detach_extent_node\\n\\t\\t\\t\\t\\t   : drop largest extent entry\\n  - sanity_check_extent_cache\\n  : access et-\u003elargest w/o lock\\n\\nlet\u0027s refactor sanity_check_extent_cache() to avoid extent cache access\\nand call it before f2fs_init_read_extent_tree() to fix this issue.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: f2fs: correcci\u00f3n para cubrir el acceso a la cach\u00e9 de extensi\u00f3n de lectura con bloqueo syzbot informa un error de f2fs como se muestra a continuaci\u00f3n: ERROR: KASAN: slab-use-after-free in sanity_check_extent_cache+0x370/0x410 fs/ f2fs/extent_cache.c:46 Lectura de tama\u00f1o 4 en la direcci\u00f3n ffff8880739ab220 por tarea syz-executor200/5097 CPU: 0 PID: 5097 Comm: syz-executor200 No contaminado 6.9.0-rc6-syzkaller #0 Nombre de hardware: Google Google Compute Engine /Google Compute Engine, BIOS Google 27/03/2024 Seguimiento de llamadas:  __dump_stack lib/dump_stack.c:88 [en l\u00ednea] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:114 print_address_description mm/kasan/report.c: 377 [en l\u00ednea] print_report+0x169/0x550 mm/kasan/report.c:488 kasan_report+0x143/0x180 mm/kasan/report.c:601 sanity_check_extent_cache+0x370/0x410 fs/f2fs/extent_cache.c:46 do_read_inode fs/f2fs /inode.c:509 [en l\u00ednea] f2fs_iget+0x33e1/0x46e0 fs/f2fs/inode.c:560 f2fs_nfs_get_inode+0x74/0x100 fs/f2fs/super.c:3237 generic_fh_to_dentry+0x9f/0xf0 fs/libfs.c:1413 exportar fs_decode_fh_raw +0x152/0x5f0 fs/exportfs/expfs.c:444 exportfs_decode_fh+0x3c/0x80 fs/exportfs/expfs.c:584 do_handle_to_path fs/fhandle.c:155 [en l\u00ednea] handle_to_path fs/fhandle.c:210 [en l\u00ednea] do_handle_open +0x495/0x650 fs/fhandle.c:226 do_syscall_x64 arch/x86/entry/common.c:52 [en l\u00ednea] do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83 Entry_SYSCALL_64_after_hwframe+0x77/0x7f Nos perdimos cubra sanity_check_extent_cache() con bloqueo de cach\u00e9 de extensi\u00f3n, por lo que, puede ocurrir el siguiente caso de ejecuci\u00f3n, lo que resultar\u00e1 en un problema de use after free. - f2fs_iget - do_read_inode - f2fs_init_read_extent_tree: agrega la entrada de mayor extensi\u00f3n al cach\u00e9 - encogimiento - f2fs_shrink_read_extent_tree - __shrink_extent_tree - __detach_extent_node: elimina la entrada de mayor extensi\u00f3n - sanity_check_extent_cache: accede a et-\u0026gt;largest sin bloqueo, refactoricemos sanity_check_extent_cache() para evitar el cach\u00e9 de extensi\u00f3n acceso y ll\u00e1melo antes de f2fs_init_read_extent_tree() para solucionar este problema.\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"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\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":5.9}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-416\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionEndExcluding\":\"6.6.47\",\"matchCriteriaId\":\"CF4F8EA7-C643-4B9C-8E32-BD81930A5E8B\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.7\",\"versionEndExcluding\":\"6.10.6\",\"matchCriteriaId\":\"C1CDF130-CCA6-47F6-9718-8949BF4E05CC\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/263df78166d3a9609b97d28c34029bd01874cbb8\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/323ef20b5558b9d9fd10c1224327af6f11a8177d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/d7409b05a64f212735f0d33f5f1602051a886eab\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]}]}}",
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2024-44941\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2024-09-10T15:27:29.159607Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2024-09-11T12:42:13.936Z\"}}], \"cna\": {\"title\": \"f2fs: fix to cover read extent cache access with lock\", \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"98e4da8ca301e062d79ae168c67e56f3c3de3ce4\", \"lessThan\": \"263df78166d3a9609b97d28c34029bd01874cbb8\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"98e4da8ca301e062d79ae168c67e56f3c3de3ce4\", \"lessThan\": \"323ef20b5558b9d9fd10c1224327af6f11a8177d\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"98e4da8ca301e062d79ae168c67e56f3c3de3ce4\", \"lessThan\": \"d7409b05a64f212735f0d33f5f1602051a886eab\", \"versionType\": \"git\"}], \"programFiles\": [\"fs/f2fs/extent_cache.c\", \"fs/f2fs/f2fs.h\", \"fs/f2fs/inode.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"3.8\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"3.8\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"6.6.47\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.6.*\"}, {\"status\": \"unaffected\", \"version\": \"6.10.6\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.10.*\"}, {\"status\": \"unaffected\", \"version\": \"6.11\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"fs/f2fs/extent_cache.c\", \"fs/f2fs/f2fs.h\", \"fs/f2fs/inode.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/263df78166d3a9609b97d28c34029bd01874cbb8\"}, {\"url\": \"https://git.kernel.org/stable/c/323ef20b5558b9d9fd10c1224327af6f11a8177d\"}, {\"url\": \"https://git.kernel.org/stable/c/d7409b05a64f212735f0d33f5f1602051a886eab\"}], \"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 cover read extent cache access with lock\\n\\nsyzbot reports a f2fs bug as below:\\n\\nBUG: KASAN: slab-use-after-free in sanity_check_extent_cache+0x370/0x410 fs/f2fs/extent_cache.c:46\\nRead of size 4 at addr ffff8880739ab220 by task syz-executor200/5097\\n\\nCPU: 0 PID: 5097 Comm: syz-executor200 Not tainted 6.9.0-rc6-syzkaller #0\\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024\\nCall Trace:\\n \u003cTASK\u003e\\n __dump_stack lib/dump_stack.c:88 [inline]\\n dump_stack_lvl+0x241/0x360 lib/dump_stack.c:114\\n print_address_description mm/kasan/report.c:377 [inline]\\n print_report+0x169/0x550 mm/kasan/report.c:488\\n kasan_report+0x143/0x180 mm/kasan/report.c:601\\n sanity_check_extent_cache+0x370/0x410 fs/f2fs/extent_cache.c:46\\n do_read_inode fs/f2fs/inode.c:509 [inline]\\n f2fs_iget+0x33e1/0x46e0 fs/f2fs/inode.c:560\\n f2fs_nfs_get_inode+0x74/0x100 fs/f2fs/super.c:3237\\n generic_fh_to_dentry+0x9f/0xf0 fs/libfs.c:1413\\n exportfs_decode_fh_raw+0x152/0x5f0 fs/exportfs/expfs.c:444\\n exportfs_decode_fh+0x3c/0x80 fs/exportfs/expfs.c:584\\n do_handle_to_path fs/fhandle.c:155 [inline]\\n handle_to_path fs/fhandle.c:210 [inline]\\n do_handle_open+0x495/0x650 fs/fhandle.c:226\\n do_syscall_x64 arch/x86/entry/common.c:52 [inline]\\n do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83\\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\\n\\nWe missed to cover sanity_check_extent_cache() w/ extent cache lock,\\nso, below race case may happen, result in use after free issue.\\n\\n- f2fs_iget\\n - do_read_inode\\n  - f2fs_init_read_extent_tree\\n  : add largest extent entry in to cache\\n\\t\\t\\t\\t\\t- shrink\\n\\t\\t\\t\\t\\t - f2fs_shrink_read_extent_tree\\n\\t\\t\\t\\t\\t  - __shrink_extent_tree\\n\\t\\t\\t\\t\\t   - __detach_extent_node\\n\\t\\t\\t\\t\\t   : drop largest extent entry\\n  - sanity_check_extent_cache\\n  : access et-\u003elargest w/o lock\\n\\nlet\u0027s refactor sanity_check_extent_cache() to avoid extent cache access\\nand call it before f2fs_init_read_extent_tree() to fix this issue.\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.6.47\", \"versionStartIncluding\": \"3.8\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.10.6\", \"versionStartIncluding\": \"3.8\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.11\", \"versionStartIncluding\": \"3.8\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2025-07-11T17:20:16.271Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2024-44941\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-07-11T17:20:16.271Z\", \"dateReserved\": \"2024-08-21T05:34:56.665Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-08-26T11:20:45.678Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}


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