CVE-2024-35895

{"id": "CVE-2024-35895", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Primary", "source": "[email protected]", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.5, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 1.8}]}, "published": "2024-05-19T09:15:10.477", "references": [{"url": "https://git.kernel.org/stable/c/668b3074aa14829e2ac2759799537a93b60fef86", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/6af057ccdd8e7619960aca1f0428339f213b31cd", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/a44770fed86515eedb5a7c00b787f847ebb134a5", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/d1e73fb19a4c872d7a399ad3c66e8ca30e0875ec", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/dd54b48db0c822ae7b520bc80751f0a0a173ef75", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/f7990498b05ac41f7d6a190dc0418ef1d21bf058", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/ff91059932401894e6c86341915615c5eb0eca48", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/668b3074aa14829e2ac2759799537a93b60fef86", "tags": ["Patch"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://git.kernel.org/stable/c/6af057ccdd8e7619960aca1f0428339f213b31cd", "tags": ["Patch"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://git.kernel.org/stable/c/a44770fed86515eedb5a7c00b787f847ebb134a5", "tags": ["Patch"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://git.kernel.org/stable/c/d1e73fb19a4c872d7a399ad3c66e8ca30e0875ec", "tags": ["Patch"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://git.kernel.org/stable/c/dd54b48db0c822ae7b520bc80751f0a0a173ef75", "tags": ["Patch"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://git.kernel.org/stable/c/f7990498b05ac41f7d6a190dc0418ef1d21bf058", "tags": ["Patch"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://git.kernel.org/stable/c/ff91059932401894e6c86341915615c5eb0eca48", "tags": ["Patch"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html", "tags": ["Mailing List"], "source": "af854a3a-2127-422b-91ae-364da2661108"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "[email protected]", "description": [{"lang": "en", "value": "CWE-667"}]}], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf, sockmap: Prevent lock inversion deadlock in map delete elem\n\nsyzkaller started using corpuses where a BPF tracing program deletes\nelements from a sockmap/sockhash map. Because BPF tracing programs can be\ninvoked from any interrupt context, locks taken during a map_delete_elem\noperation must be hardirq-safe. Otherwise a deadlock due to lock inversion\nis possible, as reported by lockdep:\n\n CPU0 CPU1\n ---- ----\n lock(&htab->buckets[i].lock);\n local_irq_disable();\n lock(&host->lock);\n lock(&htab->buckets[i].lock);\n <Interrupt>\n lock(&host->lock);\n\nLocks in sockmap are hardirq-unsafe by design. We expects elements to be\ndeleted from sockmap/sockhash only in task (normal) context with interrupts\nenabled, or in softirq context.\n\nDetect when map_delete_elem operation is invoked from a context which is\n_not_ hardirq-unsafe, that is interrupts are disabled, and bail out with an\nerror.\n\nNote that map updates are not affected by this issue. BPF verifier does not\nallow updating sockmap/sockhash from a BPF tracing program today."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: bpf, sockmap: Evitar el punto muerto de inversi\u00f3n de bloqueo en la eliminaci\u00f3n del mapa elem syzkaller comenz\u00f3 a usar corpus donde un programa de seguimiento BPF elimina elementos de un mapa sockmap/sockhash. Debido a que los programas de seguimiento BPF se pueden invocar desde cualquier contexto de interrupci\u00f3n, los bloqueos realizados durante una operaci\u00f3n map_delete_elem deben ser seguros. De lo contrario, es posible que se produzca un punto muerto debido a la inversi\u00f3n del bloqueo, como lo informa lockdep: CPU0 CPU1 ---- ---- lock(&amp;htab-&gt;buckets[i].lock); local_irq_disable(); bloquear(&amp;host-&gt;bloquear); lock(&amp;htab-&gt;cubos[i].lock); bloqueo(&amp;host-&gt;bloqueo); Los bloqueos en sockmap son dif\u00edciles de inseguro por dise\u00f1o. Esperamos que los elementos se eliminen de sockmap/sockhash solo en el contexto de la tarea (normal) con las interrupciones habilitadas o en el contexto de softirq. Detecta cu\u00e1ndo se invoca la operaci\u00f3n map_delete_elem desde un contexto que _no_ es hardirq-inseguro, es decir, las interrupciones est\u00e1n deshabilitadas y sale con un error. Tenga en cuenta que las actualizaciones de mapas no se ven afectadas por este problema. El verificador de BPF no permite actualizar sockmap/sockhash desde un programa de seguimiento de BPF en la actualidad."}], "lastModified": "2024-12-30T17:12:29.817", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "F45A0F3C-C16D-49C4-86D6-D021C3D4B834", "versionEndExcluding": "5.4.274", "versionStartIncluding": "4.20"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "9CD5894E-58E9-4B4A-B0F4-3E6BC134B8F5", "versionEndExcluding": "5.10.215", "versionStartIncluding": "5.5"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "577E212E-7E95-4A71-9B5C-F1D1A3AFFF46", "versionEndExcluding": "5.15.154", "versionStartIncluding": "5.11"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "325665BF-2409-49D9-B391-39AD4566FDBD", "versionEndExcluding": "6.1.85", "versionStartIncluding": "5.16"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "C520696A-A594-4FFC-A32D-12DA535CE911", "versionEndExcluding": "6.6.26", "versionStartIncluding": "6.2"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "DBD6C99E-4250-4DFE-8447-FF2075939D10", "versionEndExcluding": "6.8.5", "versionStartIncluding": "6.7"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.9:rc1:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "22BEDD49-2C6D-402D-9DBF-6646F6ECD10B"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.9:rc2:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "DF73CB2A-DFFD-46FB-9BFE-AA394F27EA37"}], "operator": "OR"}]}, {"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "07B237A9-69A3-4A9C-9DA0-4E06BD37AE73"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}