CVE-2024-44941
Vulnerability from cvelistv5
Published
2024-08-26 11:20
Modified
2024-12-19 09:18
Severity ?
EPSS score ?
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
{
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"content": {
"id": "CVE-2024-44941",
"options": [
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"Exploitation": "none"
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"Automatable": "no"
},
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"Technical Impact": "partial"
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"role": "CISA Coordinator",
"timestamp": "2024-09-10T15:27:29.159607Z",
"version": "2.0.3"
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"dateUpdated": "2024-09-12T17:33:04.422Z",
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"shortName": "CISA-ADP"
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"title": "CISA ADP Vulnrichment"
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"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"fs/f2fs/extent_cache.c",
"fs/f2fs/f2fs.h",
"fs/f2fs/inode.c"
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
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"fs/f2fs/inode.c"
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"vendor": "Linux",
"versions": [
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"version": "6.10.6",
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"version": "6.11",
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"descriptions": [
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"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."
}
],
"providerMetadata": {
"dateUpdated": "2024-12-19T09:18:34.233Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
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"references": [
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"url": "https://git.kernel.org/stable/c/263df78166d3a9609b97d28c34029bd01874cbb8"
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"url": "https://git.kernel.org/stable/c/323ef20b5558b9d9fd10c1224327af6f11a8177d"
},
{
"url": "https://git.kernel.org/stable/c/d7409b05a64f212735f0d33f5f1602051a886eab"
}
],
"title": "f2fs: fix to cover read extent cache access with lock",
"x_generator": {
"engine": "bippy-5f407fcff5a0"
}
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"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2024-44941",
"datePublished": "2024-08-26T11:20:45.678Z",
"dateReserved": "2024-08-21T05:34:56.665Z",
"dateUpdated": "2024-12-19T09:18:34.233Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
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"meta": {
"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\"]}]}}"
}
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.