{"dataType": "CVE_RECORD", "dataVersion": "5.1", "cveMetadata": {"cveId": "CVE-2022-49964", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-06-18T10:57:27.384Z", "datePublished": "2025-06-18T11:00:29.710Z", "dateUpdated": "2025-07-15T15:43:40.747Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2025-07-15T15:43:40.747Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\narm64: cacheinfo: Fix incorrect assignment of signed error value to unsigned fw_level\n\nThough acpi_find_last_cache_level() always returned signed value and the\ndocument states it will return any errors caused by lack of a PPTT table,\nit never returned negative values before.\n\nCommit 0c80f9e165f8 (\"ACPI: PPTT: Leave the table mapped for the runtime usage\")\nhowever changed it by returning -ENOENT if no PPTT was found. The value\nreturned from acpi_find_last_cache_level() is then assigned to unsigned\nfw_level.\n\nIt will result in the number of cache leaves calculated incorrectly as\na huge value which will then cause the following warning from __alloc_pages\nas the order would be great than MAX_ORDER because of incorrect and huge\ncache leaves value.\n\n | WARNING: CPU: 0 PID: 1 at mm/page_alloc.c:5407 __alloc_pages+0x74/0x314\n | Modules linked in:\n | CPU: 0 PID: 1 Comm: swapper/0 Not tainted 5.19.0-10393-g7c2a8d3ac4c0 #73\n | pstate: 20000005 (nzCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--)\n | pc : __alloc_pages+0x74/0x314\n | lr : alloc_pages+0xe8/0x318\n | Call trace:\n | __alloc_pages+0x74/0x314\n | alloc_pages+0xe8/0x318\n | kmalloc_order_trace+0x68/0x1dc\n | __kmalloc+0x240/0x338\n | detect_cache_attributes+0xe0/0x56c\n | update_siblings_masks+0x38/0x284\n | store_cpu_topology+0x78/0x84\n | smp_prepare_cpus+0x48/0x134\n | kernel_init_freeable+0xc4/0x14c\n | kernel_init+0x2c/0x1b4\n | ret_from_fork+0x10/0x20\n\nFix the same by changing fw_level to be signed integer and return the\nerror from init_cache_level() early in case of error."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["arch/arm64/kernel/cacheinfo.c"], "versions": [{"version": "f03d253ba71994b196f342a7acad448a56812a8c", "lessThan": "a754ee1c66bd0a23e613f0bf865053b29cb90e16", "status": "affected", "versionType": "git"}, {"version": "0c80f9e165f8f9cca743d7b6cbdb54362da297e0", "lessThan": "e75d18cecbb3805895d8ed64da4f78575ec96043", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["arch/arm64/kernel/cacheinfo.c"], "versions": [{"version": "5.19.4", "lessThan": "5.19.7", "status": "affected", "versionType": "semver"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.19.4", "versionEndExcluding": "5.19.7"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/a754ee1c66bd0a23e613f0bf865053b29cb90e16"}, {"url": "https://git.kernel.org/stable/c/e75d18cecbb3805895d8ed64da4f78575ec96043"}], "title": "arm64: cacheinfo: Fix incorrect assignment of signed error value to unsigned fw_level", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\narm64: cacheinfo: Fix incorrect assignment of signed error value to unsigned fw_level\n\nThough acpi_find_last_cache_level() always returned signed value and the\ndocument states it will return any errors caused by lack of a PPTT table,\nit never returned negative values before.\n\nCommit 0c80f9e165f8 (\"ACPI: PPTT: Leave the table mapped for the runtime usage\")\nhowever changed it by returning -ENOENT if no PPTT was found. The value\nreturned from acpi_find_last_cache_level() is then assigned to unsigned\nfw_level.\n\nIt will result in the number of cache leaves calculated incorrectly as\na huge value which will then cause the following warning from __alloc_pages\nas the order would be great than MAX_ORDER because of incorrect and huge\ncache leaves value.\n\n | WARNING: CPU: 0 PID: 1 at mm/page_alloc.c:5407 __alloc_pages+0x74/0x314\n | Modules linked in:\n | CPU: 0 PID: 1 Comm: swapper/0 Not tainted 5.19.0-10393-g7c2a8d3ac4c0 #73\n | pstate: 20000005 (nzCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--)\n | pc : __alloc_pages+0x74/0x314\n | lr : alloc_pages+0xe8/0x318\n | Call trace:\n | __alloc_pages+0x74/0x314\n | alloc_pages+0xe8/0x318\n | kmalloc_order_trace+0x68/0x1dc\n | __kmalloc+0x240/0x338\n | detect_cache_attributes+0xe0/0x56c\n | update_siblings_masks+0x38/0x284\n | store_cpu_topology+0x78/0x84\n | smp_prepare_cpus+0x48/0x134\n | kernel_init_freeable+0xc4/0x14c\n | kernel_init+0x2c/0x1b4\n | ret_from_fork+0x10/0x20\n\nFix the same by changing fw_level to be signed integer and return the\nerror from init_cache_level() early in case of error."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: arm64: cacheinfo: Se corrige la asignaci\u00f3n incorrecta de un valor de error con signo a unsigned fw_level. Aunque acpi_find_last_cache_level() siempre devolv\u00eda un valor con signo y el documento indica que devolver\u00e1 cualquier error causado por la falta de una tabla PPTT, nunca antes devolv\u00eda valores negativos. Sin embargo, el commit 0c80f9e165f8 (\"ACPI: PPTT: Dejar la tabla asignada para el uso en tiempo de ejecuci\u00f3n\") la modific\u00f3 devolviendo -ENOENT si no se encontraba PPTT. El valor devuelto por acpi_find_last_cache_level() se asigna entonces a unsigned fw_level. Esto provocar\u00e1 que el n\u00famero de hojas de cach\u00e9 se calcule incorrectamente como un valor enorme, lo que provocar\u00e1 la siguiente advertencia de __alloc_pages, ya que el orden ser\u00eda mayor que MAX_ORDER debido a un valor incorrecto y enorme de hojas de cach\u00e9. ADVERTENCIA: CPU: 0 PID: 1 en mm/page_alloc.c:5407 __alloc_pages+0x74/0x314 | M\u00f3dulos vinculados: | CPU: 0 PID: 1 Comm: swapper/0 No contaminado 5.19.0-10393-g7c2a8d3ac4c0 #73 | pstate: 20000005 (nzCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--) | pc : __alloc_pages+0x74/0x314 | lr : alloc_pages+0xe8/0x318 | Rastreo de llamadas: | __alloc_pages+0x74/0x314 | alloc_pages+0xe8/0x318 | kmalloc_order_trace+0x68/0x1dc | Corrija el mismo problema cambiando fw_level para que sea un entero con signo y devuelva el error de init_cache_level() de manera temprana en caso de error."}], "id": "CVE-2022-49964", "lastModified": "2025-07-15T16:15:23.937", "metrics": {}, "published": "2025-06-18T11:15:23.677", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/a754ee1c66bd0a23e613f0bf865053b29cb90e16"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/e75d18cecbb3805895d8ed64da4f78575ec96043"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Awaiting Analysis"}

{"bugzilla": {"description": "kernel: arm64: cacheinfo: Fix incorrect assignment of signed error value to unsigned fw_level", "id": "2373491", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2373491"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.0", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "details": ["In the Linux kernel, the following vulnerability has been resolved:\narm64: cacheinfo: Fix incorrect assignment of signed error value to unsigned fw_level\nThough acpi_find_last_cache_level() always returned signed value and the\ndocument states it will return any errors caused by lack of a PPTT table,\nit never returned negative values before.\nCommit 0c80f9e165f8 (\"ACPI: PPTT: Leave the table mapped for the runtime usage\")\nhowever changed it by returning -ENOENT if no PPTT was found. The value\nreturned from acpi_find_last_cache_level() is then assigned to unsigned\nfw_level.\nIt will result in the number of cache leaves calculated incorrectly as\na huge value which will then cause the following warning from __alloc_pages\nas the order would be great than MAX_ORDER because of incorrect and huge\ncache leaves value.\n| WARNING: CPU: 0 PID: 1 at mm/page_alloc.c:5407 __alloc_pages+0x74/0x314\n| Modules linked in:\n| CPU: 0 PID: 1 Comm: swapper/0 Not tainted 5.19.0-10393-g7c2a8d3ac4c0 #73\n| pstate: 20000005 (nzCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--)\n| pc : __alloc_pages+0x74/0x314\n| lr : alloc_pages+0xe8/0x318\n| Call trace:\n| __alloc_pages+0x74/0x314\n| alloc_pages+0xe8/0x318\n| kmalloc_order_trace+0x68/0x1dc\n| __kmalloc+0x240/0x338\n| detect_cache_attributes+0xe0/0x56c\n| update_siblings_masks+0x38/0x284\n| store_cpu_topology+0x78/0x84\n| smp_prepare_cpus+0x48/0x134\n| kernel_init_freeable+0xc4/0x14c\n| kernel_init+0x2c/0x1b4\n| ret_from_fork+0x10/0x20\nFix the same by changing fw_level to be signed integer and return the\nerror from init_cache_level() early in case of error."], "name": "CVE-2022-49964", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"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": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2025-06-18T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2022-49964\nhttps://nvd.nist.gov/vuln/detail/CVE-2022-49964\nhttps://lore.kernel.org/linux-cve-announce/2025061815-CVE-2022-49964-ff03@gregkh/T"], "threat_severity": "Moderate"}