CVE-2024-47691 (GCVE-0-2024-47691)

Vulnerability from cvelistv5 – Published: 2024-10-21 11:53 – Updated: 2026-05-11 20:38
VLAI
Title
f2fs: fix to avoid use-after-free in f2fs_stop_gc_thread()
Summary
In the Linux kernel, the following vulnerability has been resolved: f2fs: fix to avoid use-after-free in f2fs_stop_gc_thread() syzbot reports a f2fs bug as below: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:114 print_report+0xe8/0x550 mm/kasan/report.c:491 kasan_report+0x143/0x180 mm/kasan/report.c:601 kasan_check_range+0x282/0x290 mm/kasan/generic.c:189 instrument_atomic_read_write include/linux/instrumented.h:96 [inline] atomic_fetch_add_relaxed include/linux/atomic/atomic-instrumented.h:252 [inline] __refcount_add include/linux/refcount.h:184 [inline] __refcount_inc include/linux/refcount.h:241 [inline] refcount_inc include/linux/refcount.h:258 [inline] get_task_struct include/linux/sched/task.h:118 [inline] kthread_stop+0xca/0x630 kernel/kthread.c:704 f2fs_stop_gc_thread+0x65/0xb0 fs/f2fs/gc.c:210 f2fs_do_shutdown+0x192/0x540 fs/f2fs/file.c:2283 f2fs_ioc_shutdown fs/f2fs/file.c:2325 [inline] __f2fs_ioctl+0x443a/0xbe60 fs/f2fs/file.c:4325 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:907 [inline] __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:893 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f The root cause is below race condition, it may cause use-after-free issue in sbi->gc_th pointer. - remount - f2fs_remount - f2fs_stop_gc_thread - kfree(gc_th) - f2fs_ioc_shutdown - f2fs_do_shutdown - f2fs_stop_gc_thread - kthread_stop(gc_th->f2fs_gc_task) : sbi->gc_thread = NULL; We will call f2fs_do_shutdown() in two paths: - for f2fs_ioc_shutdown() path, we should grab sb->s_umount semaphore for fixing. - for f2fs_shutdown() path, it's safe since caller has already grabbed sb->s_umount semaphore.
Severity
No CVSS data available.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 7950e9ac638e84518fbdd5c930939ad46a1068c5 , < fc18e655b62ac6bc9f12f5de0d749b4a3fe1e812 (git)
Affected: 7950e9ac638e84518fbdd5c930939ad46a1068c5 , < 7c339dee7eb0f8e4cadc317c595f898ef04dae30 (git)
Affected: 7950e9ac638e84518fbdd5c930939ad46a1068c5 , < d79343cd66343709e409d96b2abb139a0a55ce34 (git)
Affected: 7950e9ac638e84518fbdd5c930939ad46a1068c5 , < c7f114d864ac91515bb07ac271e9824a20f5ed95 (git)
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Linux Linux Affected: 4.16
Unaffected: 0 , < 4.16 (semver)
Unaffected: 6.6.54 , ≤ 6.6.* (semver)
Unaffected: 6.10.13 , ≤ 6.10.* (semver)
Unaffected: 6.11.2 , ≤ 6.11.* (semver)
Unaffected: 6.12 , ≤ * (original_commit_for_fix)
Create a notification for this product.
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nf2fs: fix to avoid use-after-free in f2fs_stop_gc_thread()\n\nsyzbot reports a f2fs bug as below:\n\n __dump_stack lib/dump_stack.c:88 [inline]\n dump_stack_lvl+0x241/0x360 lib/dump_stack.c:114\n print_report+0xe8/0x550 mm/kasan/report.c:491\n kasan_report+0x143/0x180 mm/kasan/report.c:601\n kasan_check_range+0x282/0x290 mm/kasan/generic.c:189\n instrument_atomic_read_write include/linux/instrumented.h:96 [inline]\n atomic_fetch_add_relaxed include/linux/atomic/atomic-instrumented.h:252 [inline]\n __refcount_add include/linux/refcount.h:184 [inline]\n __refcount_inc include/linux/refcount.h:241 [inline]\n refcount_inc include/linux/refcount.h:258 [inline]\n get_task_struct include/linux/sched/task.h:118 [inline]\n kthread_stop+0xca/0x630 kernel/kthread.c:704\n f2fs_stop_gc_thread+0x65/0xb0 fs/f2fs/gc.c:210\n f2fs_do_shutdown+0x192/0x540 fs/f2fs/file.c:2283\n f2fs_ioc_shutdown fs/f2fs/file.c:2325 [inline]\n __f2fs_ioctl+0x443a/0xbe60 fs/f2fs/file.c:4325\n vfs_ioctl fs/ioctl.c:51 [inline]\n __do_sys_ioctl fs/ioctl.c:907 [inline]\n __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:893\n do_syscall_x64 arch/x86/entry/common.c:52 [inline]\n do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\n\nThe root cause is below race condition, it may cause use-after-free\nissue in sbi-\u003egc_th pointer.\n\n- remount\n - f2fs_remount\n  - f2fs_stop_gc_thread\n   - kfree(gc_th)\n\t\t\t\t- f2fs_ioc_shutdown\n\t\t\t\t - f2fs_do_shutdown\n\t\t\t\t  - f2fs_stop_gc_thread\n\t\t\t\t   - kthread_stop(gc_th-\u003ef2fs_gc_task)\n   : sbi-\u003egc_thread = NULL;\n\nWe will call f2fs_do_shutdown() in two paths:\n- for f2fs_ioc_shutdown() path, we should grab sb-\u003es_umount semaphore\nfor fixing.\n- for f2fs_shutdown() path, it\u0027s safe since caller has already grabbed\nsb-\u003es_umount semaphore."
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      "date": "2026-07-23",
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      "percentile": "0.1497"
    },
    "microsoft_vex": {
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      "cve": "CVE-2024-47691",
      "id": "msrc_CVE-2024-47691",
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      "title": "f2fs: fix to avoid use-after-free in f2fs_stop_gc_thread()",
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    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2024-47691\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-10-21T12:15:05.880\",\"lastModified\":\"2026-06-17T07:57:33.040\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nf2fs: fix to avoid use-after-free in f2fs_stop_gc_thread()\\n\\nsyzbot reports a f2fs bug as below:\\n\\n __dump_stack lib/dump_stack.c:88 [inline]\\n dump_stack_lvl+0x241/0x360 lib/dump_stack.c:114\\n print_report+0xe8/0x550 mm/kasan/report.c:491\\n kasan_report+0x143/0x180 mm/kasan/report.c:601\\n kasan_check_range+0x282/0x290 mm/kasan/generic.c:189\\n instrument_atomic_read_write include/linux/instrumented.h:96 [inline]\\n atomic_fetch_add_relaxed include/linux/atomic/atomic-instrumented.h:252 [inline]\\n __refcount_add include/linux/refcount.h:184 [inline]\\n __refcount_inc include/linux/refcount.h:241 [inline]\\n refcount_inc include/linux/refcount.h:258 [inline]\\n get_task_struct include/linux/sched/task.h:118 [inline]\\n kthread_stop+0xca/0x630 kernel/kthread.c:704\\n f2fs_stop_gc_thread+0x65/0xb0 fs/f2fs/gc.c:210\\n f2fs_do_shutdown+0x192/0x540 fs/f2fs/file.c:2283\\n f2fs_ioc_shutdown fs/f2fs/file.c:2325 [inline]\\n __f2fs_ioctl+0x443a/0xbe60 fs/f2fs/file.c:4325\\n vfs_ioctl fs/ioctl.c:51 [inline]\\n __do_sys_ioctl fs/ioctl.c:907 [inline]\\n __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:893\\n do_syscall_x64 arch/x86/entry/common.c:52 [inline]\\n do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83\\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\\n\\nThe root cause is below race condition, it may cause use-after-free\\nissue in sbi-\u003egc_th pointer.\\n\\n- remount\\n - f2fs_remount\\n  - f2fs_stop_gc_thread\\n   - kfree(gc_th)\\n\\t\\t\\t\\t- f2fs_ioc_shutdown\\n\\t\\t\\t\\t - f2fs_do_shutdown\\n\\t\\t\\t\\t  - f2fs_stop_gc_thread\\n\\t\\t\\t\\t   - kthread_stop(gc_th-\u003ef2fs_gc_task)\\n   : sbi-\u003egc_thread = NULL;\\n\\nWe will call f2fs_do_shutdown() in two paths:\\n- for f2fs_ioc_shutdown() path, we should grab sb-\u003es_umount semaphore\\nfor fixing.\\n- for f2fs_shutdown() path, it\u0027s safe since caller has already grabbed\\nsb-\u003es_umount semaphore.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: f2fs: correcci\u00f3n para evitar el use after free en f2fs_stop_gc_thread() syzbot informa un error de f2fs como el siguiente: __dump_stack lib/dump_stack.c:88 [en l\u00ednea] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:114 print_report+0xe8/0x550 mm/kasan/report.c:491 kasan_report+0x143/0x180 mm/kasan/report.c:601 kasan_check_range+0x282/0x290 mm/kasan/generic.c:189 instrument_atomic_read_write include/linux/instrumented.h:96 [en l\u00ednea] atomic_fetch_add_relaxed incluir/linux/atomic/atomic-instrumented.h:252 [en l\u00ednea] __refcount_add incluir/linux/refcount.h:184 [en l\u00ednea] __refcount_inc incluir/linux/refcount.h:241 [en l\u00ednea] refcount_inc incluir/linux/refcount.h:258 [en l\u00ednea] obtener_estructura_de_tareas incluir/linux/sched/task.h:118 [en l\u00ednea] kthread_stop+0xca/0x630 kernel/kthread.c:704 f2fs_stop_gc_thread+0x65/0xb0 fs/f2fs/gc.c:210 f2fs_do_shutdown+0x192/0x540 fs/f2fs/file.c:2283 f2fs_ioc_shutdown fs/f2fs/file.c:2325 [en l\u00ednea] __f2fs_ioctl+0x443a/0xbe60 fs/f2fs/file.c:4325 vfs_ioctl fs/ioctl.c:51 [en l\u00ednea] __do_sys_ioctl fs/ioctl.c:907 [en l\u00ednea] __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:893 do_syscall_x64 arch/x86/entry/common.c:52 [en l\u00ednea] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f La causa ra\u00edz est\u00e1 a continuaci\u00f3n de la condici\u00f3n de ejecuci\u00f3n, puede causar un problema de use after free en el puntero sbi-\u0026gt;gc_th. - remontar - f2fs_remount - f2fs_stop_gc_thread - kfree(gc_th) - f2fs_ioc_shutdown - f2fs_do_shutdown - f2fs_stop_gc_thread - kthread_stop(gc_th-\u0026gt;f2fs_gc_task) : sbi-\u0026gt;gc_thread = NULL; Llamaremos a f2fs_do_shutdown() en dos rutas: - para la ruta f2fs_ioc_shutdown(), debemos tomar el sem\u00e1foro sb-\u0026gt;s_umount para arreglarlo. - para la ruta f2fs_shutdown(), es seguro ya que el llamador ya ha tomado el sem\u00e1foro sb-\u0026gt;s_umount.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"fs/f2fs/f2fs.h\",\"fs/f2fs/file.c\",\"fs/f2fs/super.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"7950e9ac638e84518fbdd5c930939ad46a1068c5\",\"lessThan\":\"fc18e655b62ac6bc9f12f5de0d749b4a3fe1e812\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"7950e9ac638e84518fbdd5c930939ad46a1068c5\",\"lessThan\":\"7c339dee7eb0f8e4cadc317c595f898ef04dae30\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"7950e9ac638e84518fbdd5c930939ad46a1068c5\",\"lessThan\":\"d79343cd66343709e409d96b2abb139a0a55ce34\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"7950e9ac638e84518fbdd5c930939ad46a1068c5\",\"lessThan\":\"c7f114d864ac91515bb07ac271e9824a20f5ed95\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"fs/f2fs/f2fs.h\",\"fs/f2fs/file.c\",\"fs/f2fs/super.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"4.16\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"4.16\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.54\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.10.13\",\"lessThanOrEqual\":\"6.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.11.2\",\"lessThanOrEqual\":\"6.11.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"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}],\"ssvcV203\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"ssvcData\":{\"timestamp\":\"2024-10-21T13:05:54.447851Z\",\"id\":\"CVE-2024-47691\",\"options\":[{\"exploitation\":\"none\"},{\"automatable\":\"no\"},{\"technicalImpact\":\"partial\"}],\"role\":\"CISA Coordinator\",\"version\":\"2.0.3\"}}]},\"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:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"4.16\",\"versionEndExcluding\":\"6.6.54\",\"matchCriteriaId\":\"955B9A45-6500-43F0-BFD6-27ED37A0DC7A\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.7\",\"versionEndExcluding\":\"6.10.13\",\"matchCriteriaId\":\"CE94BB8D-B0AB-4563-9ED7-A12122B56EBE\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.11\",\"versionEndExcluding\":\"6.11.2\",\"matchCriteriaId\":\"AB755D26-97F4-43B6-8604-CD076811E181\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/7c339dee7eb0f8e4cadc317c595f898ef04dae30\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/c7f114d864ac91515bb07ac271e9824a20f5ed95\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/d79343cd66343709e409d96b2abb139a0a55ce34\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/fc18e655b62ac6bc9f12f5de0d749b4a3fe1e812\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]}]}}",
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2025-11-21T14:22:14+00:00",
      "cve": "CVE-2024-47691",
      "id": "CVE-2024-47691",
      "initial_release_date": "2024-10-21T00:00:00+00:00",
      "product_status:known_not_affected": "198",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: f2fs: fix to avoid use-after-free in f2fs_stop_gc_thread()",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2024/cve-2024-47691.json",
      "version": "3"
    },
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2024-47691\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2024-10-21T13:05:54.447851Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2024-10-21T13:05:57.761Z\"}}], \"cna\": {\"title\": \"f2fs: fix to avoid use-after-free in f2fs_stop_gc_thread()\", \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"7950e9ac638e84518fbdd5c930939ad46a1068c5\", \"lessThan\": \"fc18e655b62ac6bc9f12f5de0d749b4a3fe1e812\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"7950e9ac638e84518fbdd5c930939ad46a1068c5\", \"lessThan\": \"7c339dee7eb0f8e4cadc317c595f898ef04dae30\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"7950e9ac638e84518fbdd5c930939ad46a1068c5\", \"lessThan\": \"d79343cd66343709e409d96b2abb139a0a55ce34\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"7950e9ac638e84518fbdd5c930939ad46a1068c5\", \"lessThan\": \"c7f114d864ac91515bb07ac271e9824a20f5ed95\", \"versionType\": \"git\"}], \"programFiles\": [\"fs/f2fs/f2fs.h\", \"fs/f2fs/file.c\", \"fs/f2fs/super.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"4.16\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"4.16\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"6.6.54\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.6.*\"}, {\"status\": \"unaffected\", \"version\": \"6.10.13\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.10.*\"}, {\"status\": \"unaffected\", \"version\": \"6.11.2\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.11.*\"}, {\"status\": \"unaffected\", \"version\": \"6.12\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"fs/f2fs/f2fs.h\", \"fs/f2fs/file.c\", \"fs/f2fs/super.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/fc18e655b62ac6bc9f12f5de0d749b4a3fe1e812\"}, {\"url\": \"https://git.kernel.org/stable/c/7c339dee7eb0f8e4cadc317c595f898ef04dae30\"}, {\"url\": \"https://git.kernel.org/stable/c/d79343cd66343709e409d96b2abb139a0a55ce34\"}, {\"url\": \"https://git.kernel.org/stable/c/c7f114d864ac91515bb07ac271e9824a20f5ed95\"}], \"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 use-after-free in f2fs_stop_gc_thread()\\n\\nsyzbot reports a f2fs bug as below:\\n\\n __dump_stack lib/dump_stack.c:88 [inline]\\n dump_stack_lvl+0x241/0x360 lib/dump_stack.c:114\\n print_report+0xe8/0x550 mm/kasan/report.c:491\\n kasan_report+0x143/0x180 mm/kasan/report.c:601\\n kasan_check_range+0x282/0x290 mm/kasan/generic.c:189\\n instrument_atomic_read_write include/linux/instrumented.h:96 [inline]\\n atomic_fetch_add_relaxed include/linux/atomic/atomic-instrumented.h:252 [inline]\\n __refcount_add include/linux/refcount.h:184 [inline]\\n __refcount_inc include/linux/refcount.h:241 [inline]\\n refcount_inc include/linux/refcount.h:258 [inline]\\n get_task_struct include/linux/sched/task.h:118 [inline]\\n kthread_stop+0xca/0x630 kernel/kthread.c:704\\n f2fs_stop_gc_thread+0x65/0xb0 fs/f2fs/gc.c:210\\n f2fs_do_shutdown+0x192/0x540 fs/f2fs/file.c:2283\\n f2fs_ioc_shutdown fs/f2fs/file.c:2325 [inline]\\n __f2fs_ioctl+0x443a/0xbe60 fs/f2fs/file.c:4325\\n vfs_ioctl fs/ioctl.c:51 [inline]\\n __do_sys_ioctl fs/ioctl.c:907 [inline]\\n __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:893\\n do_syscall_x64 arch/x86/entry/common.c:52 [inline]\\n do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83\\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\\n\\nThe root cause is below race condition, it may cause use-after-free\\nissue in sbi-\u003egc_th pointer.\\n\\n- remount\\n - f2fs_remount\\n  - f2fs_stop_gc_thread\\n   - kfree(gc_th)\\n\\t\\t\\t\\t- f2fs_ioc_shutdown\\n\\t\\t\\t\\t - f2fs_do_shutdown\\n\\t\\t\\t\\t  - f2fs_stop_gc_thread\\n\\t\\t\\t\\t   - kthread_stop(gc_th-\u003ef2fs_gc_task)\\n   : sbi-\u003egc_thread = NULL;\\n\\nWe will call f2fs_do_shutdown() in two paths:\\n- for f2fs_ioc_shutdown() path, we should grab sb-\u003es_umount semaphore\\nfor fixing.\\n- for f2fs_shutdown() path, it\u0027s safe since caller has already grabbed\\nsb-\u003es_umount semaphore.\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.6.54\", \"versionStartIncluding\": \"4.16\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.10.13\", \"versionStartIncluding\": \"4.16\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.11.2\", \"versionStartIncluding\": \"4.16\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.12\", \"versionStartIncluding\": \"4.16\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2025-05-04T09:37:28.674Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2024-47691\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-05-04T09:37:28.674Z\", \"dateReserved\": \"2024-09-30T16:00:12.942Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-10-21T11:53:30.555Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.