cve-2023-52468
Vulnerability from cvelistv5
Published
2024-02-25 08:16
Modified
2024-12-19 08:20
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: class: fix use-after-free in class_register() The lock_class_key is still registered and can be found in lock_keys_hash hlist after subsys_private is freed in error handler path.A task who iterate over the lock_keys_hash later may cause use-after-free.So fix that up and unregister the lock_class_key before kfree(cp). On our platform, a driver fails to kset_register because of creating duplicate filename '/class/xxx'.With Kasan enabled, it prints a invalid-access bug report. KASAN bug report: BUG: KASAN: invalid-access in lockdep_register_key+0x19c/0x1bc Write of size 8 at addr 15ffff808b8c0368 by task modprobe/252 Pointer tag: [15], memory tag: [fe] CPU: 7 PID: 252 Comm: modprobe Tainted: G W 6.6.0-mainline-maybe-dirty #1 Call trace: dump_backtrace+0x1b0/0x1e4 show_stack+0x2c/0x40 dump_stack_lvl+0xac/0xe0 print_report+0x18c/0x4d8 kasan_report+0xe8/0x148 __hwasan_store8_noabort+0x88/0x98 lockdep_register_key+0x19c/0x1bc class_register+0x94/0x1ec init_module+0xbc/0xf48 [rfkill] do_one_initcall+0x17c/0x72c do_init_module+0x19c/0x3f8 ... Memory state around the buggy address: ffffff808b8c0100: 8a 8a 8a 8a 8a 8a 8a 8a 8a 8a 8a 8a 8a 8a 8a 8a ffffff808b8c0200: 8a 8a 8a 8a 8a 8a 8a 8a fe fe fe fe fe fe fe fe >ffffff808b8c0300: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe ^ ffffff808b8c0400: 03 03 03 03 03 03 03 03 03 03 03 03 03 03 03 03 As CONFIG_KASAN_GENERIC is not set, Kasan reports invalid-access not use-after-free here.In this case, modprobe is manipulating the corrupted lock_keys_hash hlish where lock_class_key is already freed before. It's worth noting that this only can happen if lockdep is enabled, which is not true for normal system.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/0f1486dafca3398c4c46b9f6e6452fa27e73b559Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/93ec4a3b76404bce01bd5c9032bef5df6feb1d62Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b57196a5ec5e4c0ffecde8348b085b778c7dce04Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/0f1486dafca3398c4c46b9f6e6452fa27e73b559Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/93ec4a3b76404bce01bd5c9032bef5df6feb1d62Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/b57196a5ec5e4c0ffecde8348b085b778c7dce04Patch
Impacted products
Vendor Product Version
Linux Linux Version: 6.4
Show details on NVD website

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    "nvd": "{\"cve\":{\"id\":\"CVE-2023-52468\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-02-26T16:27:48.710\",\"lastModified\":\"2024-11-21T08:39:50.360\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nclass: fix use-after-free in class_register()\\n\\nThe lock_class_key is still registered and can be found in\\nlock_keys_hash hlist after subsys_private is freed in error\\nhandler path.A task who iterate over the lock_keys_hash\\nlater may cause use-after-free.So fix that up and unregister\\nthe lock_class_key before kfree(cp).\\n\\nOn our platform, a driver fails to kset_register because of\\ncreating duplicate filename \u0027/class/xxx\u0027.With Kasan enabled,\\nit prints a invalid-access bug report.\\n\\nKASAN bug report:\\n\\nBUG: KASAN: invalid-access in lockdep_register_key+0x19c/0x1bc\\nWrite of size 8 at addr 15ffff808b8c0368 by task modprobe/252\\nPointer tag: [15], memory tag: [fe]\\n\\nCPU: 7 PID: 252 Comm: modprobe Tainted: G        W\\n 6.6.0-mainline-maybe-dirty #1\\n\\nCall trace:\\ndump_backtrace+0x1b0/0x1e4\\nshow_stack+0x2c/0x40\\ndump_stack_lvl+0xac/0xe0\\nprint_report+0x18c/0x4d8\\nkasan_report+0xe8/0x148\\n__hwasan_store8_noabort+0x88/0x98\\nlockdep_register_key+0x19c/0x1bc\\nclass_register+0x94/0x1ec\\ninit_module+0xbc/0xf48 [rfkill]\\ndo_one_initcall+0x17c/0x72c\\ndo_init_module+0x19c/0x3f8\\n...\\nMemory state around the buggy address:\\nffffff808b8c0100: 8a 8a 8a 8a 8a 8a 8a 8a 8a 8a 8a 8a 8a 8a 8a 8a\\nffffff808b8c0200: 8a 8a 8a 8a 8a 8a 8a 8a fe fe fe fe fe fe fe fe\\n\u003effffff808b8c0300: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe\\n                                     ^\\nffffff808b8c0400: 03 03 03 03 03 03 03 03 03 03 03 03 03 03 03 03\\n\\nAs CONFIG_KASAN_GENERIC is not set, Kasan reports invalid-access\\nnot use-after-free here.In this case, modprobe is manipulating\\nthe corrupted lock_keys_hash hlish where lock_class_key is already\\nfreed before.\\n\\nIt\u0027s worth noting that this only can happen if lockdep is enabled,\\nwhich is not true for normal system.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: clase: corrige use-after-free en class_register() Lock_class_key todav\u00eda est\u00e1 registrada y se puede encontrar en lock_keys_hash hlist despu\u00e9s de que subsys_private se libere en la ruta del controlador de errores. Una tarea que itera sobre Lock_keys_hash m\u00e1s tarde puede causar use-after-free. As\u00ed que solucione eso y cancele el registro de lock_class_key antes de kfree (cp). En nuestra plataforma, un controlador no logra kset_register debido a que crea un nombre de archivo duplicado \u0027/class/xxx\u0027. Con Kasan habilitado, imprime un informe de error de acceso no v\u00e1lido. Informe de error de KASAN: ERROR: KASAN: acceso no v\u00e1lido en lockdep_register_key+0x19c/0x1bc Escritura de tama\u00f1o 8 en la direcci\u00f3n 15ffff808b8c0368 mediante tarea modprobe/252 Etiqueta de puntero: [15], etiqueta de memoria: [fe] CPU: 7 PID: 252 Comm: modprobe contaminado: GW 6.6.0-mainline-maybe-dirty #1 Rastreo de llamadas: dump_backtrace+0x1b0/0x1e4 show_stack+0x2c/0x40 dump_stack_lvl+0xac/0xe0 print_report+0x18c/0x4d8 kasan_report+0xe8/0x148 __hwasan_store8_noabort+0x 88/0x98 lockdep_register_key+ 0x19c/0x1bc class_register+0x94/0x1ec init_module+0xbc/0xf48 [rfkill] do_one_initcall+0x17c/0x72c do_init_module+0x19c/0x3f8 ... Estado de la memoria alrededor de la direcci\u00f3n del error: ffffff808b8c0100: 8a 8a 8a 8a 8a 8 un 8a 8a 8a 8a 8a 8a 8a 8a 8a 8a ffffff808b8c0200: 8a 8a 8a 8a 8a 8a 8a 8a 8a fe fe fe fe fe fe\u0026gt; ffffff808b8c0300: fe fe fe fe fe fe fe fe fe fe fe fe fe fe ^ fffffff808b8c0400: 03 03 03 03 03 03 03 03 03 03 03 03 03 03 03 03 03 03 03 03 03 03 03 03 Como CONFIG_KASAN_GENERIC no est\u00e1 configurado, Kasan informa aqu\u00ed de acceso no v\u00e1lido, no use-after-free. En este caso, modprobe est\u00e1 manipulando el lock_keys_hash hlish corrupto donde lock_class_key ya se liber\u00f3 antes. Vale la pena se\u00f1alar que esto s\u00f3lo puede suceder si lockdep est\u00e1 habilitado, lo cual no es cierto para el sistema normal.\"}],\"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:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.4.0\",\"versionEndExcluding\":\"6.6.14\",\"matchCriteriaId\":\"686183E6-D5C3-4A5B-9A18-8E3B4294EA6A\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.7.0\",\"versionEndExcluding\":\"6.7.2\",\"matchCriteriaId\":\"0EA3778C-730B-464C-8023-18CA6AC0B807\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/0f1486dafca3398c4c46b9f6e6452fa27e73b559\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/93ec4a3b76404bce01bd5c9032bef5df6feb1d62\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/b57196a5ec5e4c0ffecde8348b085b778c7dce04\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/0f1486dafca3398c4c46b9f6e6452fa27e73b559\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/93ec4a3b76404bce01bd5c9032bef5df6feb1d62\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/b57196a5ec5e4c0ffecde8348b085b778c7dce04\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]}]}}"
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}


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