CVE-2024-42161

{"id": "CVE-2024-42161", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Primary", "source": "[email protected]", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 6.3, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "HIGH", "confidentialityImpact": "LOW"}, "impactScore": 5.5, "exploitabilityScore": 0.8}]}, "published": "2024-07-30T08:15:07.447", "references": [{"url": "https://git.kernel.org/stable/c/009367099eb61a4fc2af44d4eb06b6b4de7de6db", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/3364c2ed1c241989847f19cf83e3db903ce689e3", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/7e5471b5efebc30dd0bc035cda86693a5c73d45f", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/a21d76bd0b0d39518e9a4c19f6cf7c042a974aff", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/b694989bb13ed5f166e633faa1eb0f21c6d261a6", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/ff941a8449e712eaf7efca1a13bfb9afd3d99fc2", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/009367099eb61a4fc2af44d4eb06b6b4de7de6db", "tags": ["Patch"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://git.kernel.org/stable/c/3364c2ed1c241989847f19cf83e3db903ce689e3", "tags": ["Patch"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://git.kernel.org/stable/c/7e5471b5efebc30dd0bc035cda86693a5c73d45f", "tags": ["Patch"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://git.kernel.org/stable/c/a21d76bd0b0d39518e9a4c19f6cf7c042a974aff", "tags": ["Patch"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://git.kernel.org/stable/c/b694989bb13ed5f166e633faa1eb0f21c6d261a6", "tags": ["Patch"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://git.kernel.org/stable/c/ff941a8449e712eaf7efca1a13bfb9afd3d99fc2", "tags": ["Patch"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html", "source": "af854a3a-2127-422b-91ae-364da2661108"}], "vulnStatus": "Modified", "weaknesses": [{"type": "Primary", "source": "[email protected]", "description": [{"lang": "en", "value": "CWE-908"}]}], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Avoid uninitialized value in BPF_CORE_READ_BITFIELD\n\n[Changes from V1:\n - Use a default branch in the switch statement to initialize `val'.]\n\nGCC warns that `val' may be used uninitialized in the\nBPF_CRE_READ_BITFIELD macro, defined in bpf_core_read.h as:\n\n\t[...]\n\tunsigned long long val;\t\t\t\t\t\t \\\n\t[...]\t\t\t\t\t\t\t\t \\\n\tswitch (__CORE_RELO(s, field, BYTE_SIZE)) {\t\t\t \\\n\tcase 1: val = *(const unsigned char *)p; break;\t\t\t \\\n\tcase 2: val = *(const unsigned short *)p; break;\t\t \\\n\tcase 4: val = *(const unsigned int *)p; break;\t\t\t \\\n\tcase 8: val = *(const unsigned long long *)p; break;\t\t \\\n } \t\t\t\t\t\t\t \\\n\t[...]\n\tval;\t\t\t\t\t\t\t\t \\\n\t}\t\t\t\t\t\t\t\t \\\n\nThis patch adds a default entry in the switch statement that sets\n`val' to zero in order to avoid the warning, and random values to be\nused in case __builtin_preserve_field_info returns unexpected values\nfor BPF_FIELD_BYTE_SIZE.\n\nTested in bpf-next master.\nNo regressions."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: bpf: Evite el valor no inicializado en BPF_CORE_READ_BITFIELD [Cambios desde V1: - Use una rama predeterminada en la instrucci\u00f3n switch para inicializar `val'.] GCC advierte que `val' puede usarse sin inicializar en la macro BPF_CRE_READ_BITFIELD, definida en bpf_core_read.h como: [...] unsigned long long val; \\ [...] \\ switch (__CORE_RELO(s, campo, BYTE_SIZE)) { \\ case 1: val = *(const unsigned char *)p; break; \\ case 2: val = *(const unsigned short *)p; break; \\ case 4: val = *(const unsigned int *)p; romper; \\ case 8: val = *(const unsigned long long *)p; break; \\ } \\ [...] val; \\ } \\ Este parche agrega una entrada predeterminada en la declaraci\u00f3n de cambio que establece `val' en cero para evitar la advertencia, y valores aleatorios que se usar\u00e1n en caso de que __builtin_preserve_field_info devuelva valores inesperados para BPF_FIELD_BYTE_SIZE. Probado en bpf-next master. Sin regresiones."}], "lastModified": "2025-11-03T22:17:44.150", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "0ADFA1F9-906A-4D75-8667-7FECEF422B59", "versionEndExcluding": "5.10.222"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "A97DEB09-4927-40F8-B5C6-F5BD5EAE0CFD", "versionEndExcluding": "5.15.163", "versionStartIncluding": "5.11"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "E09E92A5-27EF-40E4-926A-B1CDC8270551", "versionEndExcluding": "6.1.98", "versionStartIncluding": "5.16"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "29E894E4-668F-4DB0-81F7-4FB5F698E970", "versionEndExcluding": "6.6.39", "versionStartIncluding": "6.2"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "ADCC1407-0CB3-4C8F-B4C5-07F682CD7085", "versionEndExcluding": "6.9.9", "versionStartIncluding": "6.7"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}