{"dataType": "CVE_RECORD", "dataVersion": "5.1", "cveMetadata": {"cveId": "CVE-2024-42293", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-07-30T07:40:12.268Z", "datePublished": "2024-08-17T09:09:02.303Z", "dateUpdated": "2024-11-05T09:39:52.273Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2024-11-05T09:39:52.273Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\narm64: mm: Fix lockless walks with static and dynamic page-table folding\n\nLina reports random oopsen originating from the fast GUP code when\n16K pages are used with 4-level page-tables, the fourth level being\nfolded at runtime due to lack of LPA2.\n\nIn this configuration, the generic implementation of\np4d_offset_lockless() will return a 'p4d_t *' corresponding to the\n'pgd_t' allocated on the stack of the caller, gup_fast_pgd_range().\nThis is normally fine, but when the fourth level of page-table is folded\nat runtime, pud_offset_lockless() will offset from the address of the\n'p4d_t' to calculate the address of the PUD in the same page-table page.\nThis results in a stray stack read when the 'p4d_t' has been allocated\non the stack and can send the walker into the weeds.\n\nFix the problem by providing our own definition of p4d_offset_lockless()\nwhen CONFIG_PGTABLE_LEVELS <= 4 which returns the real page-table\npointer rather than the address of the local stack variable."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["arch/arm64/include/asm/pgtable.h"], "versions": [{"version": "0dd4f60a2c76", "lessThan": "78672d49d3ee", "status": "affected", "versionType": "git"}, {"version": "0dd4f60a2c76", "lessThan": "36639013b346", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["arch/arm64/include/asm/pgtable.h"], "versions": [{"version": "6.9", "status": "affected"}, {"version": "0", "lessThan": "6.9", "status": "unaffected", "versionType": "semver"}, {"version": "6.10.3", "lessThanOrEqual": "6.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.11", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "references": [{"url": "https://git.kernel.org/stable/c/78672d49d3eebbcda3589f4d6e589caf357c5a59"}, {"url": "https://git.kernel.org/stable/c/36639013b3462c06ff8e3400a427f775b4fc97f5"}], "title": "arm64: mm: Fix lockless walks with static and dynamic page-table folding", "x_generator": {"engine": "bippy-9e1c9544281a"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2024-42293", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2024-09-10T16:10:57.009784Z"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-09-12T17:33:29.368Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2024-42293", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2024-09-10T16:10:57.009784Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-09-11T12:42:23.664Z"}}], "cna": {"title": "arm64: mm: Fix lockless walks with static and dynamic page-table folding", "affected": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "0dd4f60a2c76", "lessThan": "78672d49d3ee", "versionType": "git"}, {"status": "affected", "version": "0dd4f60a2c76", "lessThan": "36639013b346", "versionType": "git"}], "programFiles": ["arch/arm64/include/asm/pgtable.h"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "6.9"}, {"status": "unaffected", "version": "0", "lessThan": "6.9", "versionType": "semver"}, {"status": "unaffected", "version": "6.10.3", "versionType": "semver", "lessThanOrEqual": "6.10.*"}, {"status": "unaffected", "version": "6.11", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["arch/arm64/include/asm/pgtable.h"], "defaultStatus": "affected"}], "references": [{"url": "https://git.kernel.org/stable/c/78672d49d3eebbcda3589f4d6e589caf357c5a59"}, {"url": "https://git.kernel.org/stable/c/36639013b3462c06ff8e3400a427f775b4fc97f5"}], "x_generator": {"engine": "bippy-9e1c9544281a"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\narm64: mm: Fix lockless walks with static and dynamic page-table folding\n\nLina reports random oopsen originating from the fast GUP code when\n16K pages are used with 4-level page-tables, the fourth level being\nfolded at runtime due to lack of LPA2.\n\nIn this configuration, the generic implementation of\np4d_offset_lockless() will return a 'p4d_t *' corresponding to the\n'pgd_t' allocated on the stack of the caller, gup_fast_pgd_range().\nThis is normally fine, but when the fourth level of page-table is folded\nat runtime, pud_offset_lockless() will offset from the address of the\n'p4d_t' to calculate the address of the PUD in the same page-table page.\nThis results in a stray stack read when the 'p4d_t' has been allocated\non the stack and can send the walker into the weeds.\n\nFix the problem by providing our own definition of p4d_offset_lockless()\nwhen CONFIG_PGTABLE_LEVELS <= 4 which returns the real page-table\npointer rather than the address of the local stack variable."}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2024-11-05T09:39:52.273Z"}}}, "cveMetadata": {"cveId": "CVE-2024-42293", "state": "PUBLISHED", "dateUpdated": "2024-11-05T09:39:52.273Z", "dateReserved": "2024-07-30T07:40:12.268Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2024-08-17T09:09:02.303Z", "assignerShortName": "Linux"}, "dataVersion": "5.1"}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\narm64: mm: Fix lockless walks with static and dynamic page-table folding\n\nLina reports random oopsen originating from the fast GUP code when\n16K pages are used with 4-level page-tables, the fourth level being\nfolded at runtime due to lack of LPA2.\n\nIn this configuration, the generic implementation of\np4d_offset_lockless() will return a 'p4d_t *' corresponding to the\n'pgd_t' allocated on the stack of the caller, gup_fast_pgd_range().\nThis is normally fine, but when the fourth level of page-table is folded\nat runtime, pud_offset_lockless() will offset from the address of the\n'p4d_t' to calculate the address of the PUD in the same page-table page.\nThis results in a stray stack read when the 'p4d_t' has been allocated\non the stack and can send the walker into the weeds.\n\nFix the problem by providing our own definition of p4d_offset_lockless()\nwhen CONFIG_PGTABLE_LEVELS <= 4 which returns the real page-table\npointer rather than the address of the local stack variable."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: arm64: mm: corrige recorridos sin bloqueo con plegado de tablas de p\u00e1ginas est\u00e1ticas y din\u00e1micas. Lina informa oopsen aleatorios que se originan en el c\u00f3digo GUP r\u00e1pido cuando se utilizan p\u00e1ginas de 16 KB con tablas de p\u00e1ginas de 4 niveles. el cuarto nivel se pliega en tiempo de ejecuci\u00f3n debido a la falta de LPA2. En esta configuraci\u00f3n, la implementaci\u00f3n gen\u00e9rica de p4d_offset_lockless() devolver\u00e1 un 'p4d_t *' correspondiente al 'pgd_t' asignado en la pila de la persona que llama, gup_fast_pgd_range(). Esto normalmente est\u00e1 bien, pero cuando el cuarto nivel de la tabla de p\u00e1ginas se pliega en tiempo de ejecuci\u00f3n, pud_offset_lockless() se desplazar\u00e1 de la direcci\u00f3n de 'p4d_t' para calcular la direcci\u00f3n del PUD en la misma p\u00e1gina de la tabla de p\u00e1ginas. Esto da como resultado una lectura de pila perdida cuando el 'p4d_t' se ha asignado en la pila y puede enviar al caminante hacia la maleza. Solucione el problema proporcionando nuestra propia definici\u00f3n de p4d_offset_lockless() cuando CONFIG_PGTABLE_LEVELS &lt;= 4, que devuelve el puntero de la tabla de p\u00e1ginas real en lugar de la direcci\u00f3n de la variable de pila local."}], "id": "CVE-2024-42293", "lastModified": "2024-08-19T12:59:59.177", "metrics": {}, "published": "2024-08-17T09:15:09.867", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/36639013b3462c06ff8e3400a427f775b4fc97f5"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/78672d49d3eebbcda3589f4d6e589caf357c5a59"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Awaiting Analysis"}

{"bugzilla": {"description": "kernel: arm64: mm: Fix lockless walks with static and dynamic page-table folding", "id": "2305438", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2305438"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.1", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H", "status": "draft"}, "cwe": "CWE-125", "details": ["In the Linux kernel, the following vulnerability has been resolved:\narm64: mm: Fix lockless walks with static and dynamic page-table folding\nLina reports random oopsen originating from the fast GUP code when\n16K pages are used with 4-level page-tables, the fourth level being\nfolded at runtime due to lack of LPA2.\nIn this configuration, the generic implementation of\np4d_offset_lockless() will return a 'p4d_t *' corresponding to the\n'pgd_t' allocated on the stack of the caller, gup_fast_pgd_range().\nThis is normally fine, but when the fourth level of page-table is folded\nat runtime, pud_offset_lockless() will offset from the address of the\n'p4d_t' to calculate the address of the PUD in the same page-table page.\nThis results in a stray stack read when the 'p4d_t' has been allocated\non the stack and can send the walker into the weeds.\nFix the problem by providing our own definition of p4d_offset_lockless()\nwhen CONFIG_PGTABLE_LEVELS <= 4 which returns the real page-table\npointer rather than the address of the local stack variable."], "name": "CVE-2024-42293", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "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": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2024-08-17T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2024-42293\nhttps://nvd.nist.gov/vuln/detail/CVE-2024-42293\nhttps://lore.kernel.org/linux-cve-announce/2024081746-CVE-2024-42293-0660@gregkh/T"], "threat_severity": "Moderate"}