{"dataType": "CVE_RECORD", "dataVersion": "5.1", "cveMetadata": {"cveId": "CVE-2023-52468", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-02-20T12:30:33.297Z", "datePublished": "2024-02-25T08:16:32.387Z", "dateUpdated": "2025-05-04T07:37:20.416Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2025-05-04T07:37:20.416Z"}, "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 '/class/xxx'.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>ffffff808b8c0300: 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's worth noting that this only can happen if lockdep is enabled,\nwhich is not true for normal system."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/base/class.c"], "versions": [{"version": "dcfbb67e48a2becfce7990386e985b9c45098ee5", "lessThan": "b57196a5ec5e4c0ffecde8348b085b778c7dce04", "status": "affected", "versionType": "git"}, {"version": "dcfbb67e48a2becfce7990386e985b9c45098ee5", "lessThan": "0f1486dafca3398c4c46b9f6e6452fa27e73b559", "status": "affected", "versionType": "git"}, {"version": "dcfbb67e48a2becfce7990386e985b9c45098ee5", "lessThan": "93ec4a3b76404bce01bd5c9032bef5df6feb1d62", "status": 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"versionStartIncluding": "6.4", "versionEndExcluding": "6.7.2"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.4", "versionEndExcluding": "6.8"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/b57196a5ec5e4c0ffecde8348b085b778c7dce04"}, {"url": "https://git.kernel.org/stable/c/0f1486dafca3398c4c46b9f6e6452fa27e73b559"}, {"url": "https://git.kernel.org/stable/c/93ec4a3b76404bce01bd5c9032bef5df6feb1d62"}], "title": "class: fix use-after-free in class_register()", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2023-52468", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2024-02-26T18:14:41.496128Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", 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Vulnrichment"}], "cna": {"title": "class: fix use-after-free in class_register()", "affected": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "dcfbb67e48a2becfce7990386e985b9c45098ee5", "lessThan": "b57196a5ec5e4c0ffecde8348b085b778c7dce04", "versionType": "git"}, {"status": "affected", "version": "dcfbb67e48a2becfce7990386e985b9c45098ee5", "lessThan": "0f1486dafca3398c4c46b9f6e6452fa27e73b559", "versionType": "git"}, {"status": "affected", "version": "dcfbb67e48a2becfce7990386e985b9c45098ee5", "lessThan": "93ec4a3b76404bce01bd5c9032bef5df6feb1d62", "versionType": "git"}], "programFiles": ["drivers/base/class.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "6.4"}, {"status": "unaffected", "version": "0", "lessThan": "6.4", "versionType": "semver"}, {"status": "unaffected", "version": "6.6.14", "versionType": "semver", "lessThanOrEqual": "6.6.*"}, {"status": "unaffected", "version": "6.7.2", "versionType": "semver", "lessThanOrEqual": "6.7.*"}, {"status": "unaffected", "version": "6.8", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["drivers/base/class.c"], "defaultStatus": "affected"}], "references": [{"url": "https://git.kernel.org/stable/c/b57196a5ec5e4c0ffecde8348b085b778c7dce04"}, {"url": "https://git.kernel.org/stable/c/0f1486dafca3398c4c46b9f6e6452fa27e73b559"}, {"url": "https://git.kernel.org/stable/c/93ec4a3b76404bce01bd5c9032bef5df6feb1d62"}], "x_generator": {"engine": "bippy-1.2.0"}, "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 '/class/xxx'.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>ffffff808b8c0300: 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's worth noting that this only can happen if lockdep is enabled,\nwhich is not true for normal system."}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.6.14", "versionStartIncluding": "6.4"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.7.2", "versionStartIncluding": "6.4"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", 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{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "686183E6-D5C3-4A5B-9A18-8E3B4294EA6A", "versionEndExcluding": "6.6.14", "versionStartIncluding": "6.4.0", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "0EA3778C-730B-464C-8023-18CA6AC0B807", "versionEndExcluding": "6.7.2", "versionStartIncluding": "6.7.0", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "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 '/class/xxx'.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>ffffff808b8c0300: 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's 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 '/class/xxx'. 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> 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."}], "id": "CVE-2023-52468", "lastModified": "2024-11-21T08:39:50.360", "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": "nvd@nist.gov", "type": "Primary"}]}, "published": "2024-02-26T16:27:48.710", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "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": "af854a3a-2127-422b-91ae-364da2661108", "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"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-416"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: use-after-free in class_register()", "id": "2266340", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2266340"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.4", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-416", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nclass: fix use-after-free in class_register()\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).\nOn our platform, a driver fails to kset_register because of\ncreating duplicate filename '/class/xxx'.With Kasan enabled,\nit prints a invalid-access bug report.\nKASAN bug report:\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]\nCPU: 7 PID: 252 Comm: modprobe Tainted: G W\n6.6.0-mainline-maybe-dirty #1\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>ffffff808b8c0300: 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\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.\nIt's worth noting that this only can happen if lockdep is enabled,\nwhich is not true for normal system.", "A use-after-free flaw was found in class_register() in the Linux kernel. This issue occurs due to the lock_class_key is still being registered and found in lock_keys_hash hlist after subsys_private is freed in the error handler path. If a task iterates over the lock_keys_hash, it may cause a use-after-free."], "name": "CVE-2023-52468", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Will not fix", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Will not fix", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Will not fix", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Will not fix", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2024-02-26T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2023-52468\nhttps://nvd.nist.gov/vuln/detail/CVE-2023-52468\nhttps://git.kernel.org/stable/c/0f1486dafca3398c4c46b9f6e6452fa27e73b559\nhttps://git.kernel.org/stable/c/93ec4a3b76404bce01bd5c9032bef5df6feb1d62\nhttps://git.kernel.org/stable/c/b57196a5ec5e4c0ffecde8348b085b778c7dce04"], "threat_severity": "Low"}

{}