CVE-2024-43835

{"id": "CVE-2024-43835", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "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": "2024-08-17T10:15:09.183", "references": [{"url": "https://git.kernel.org/stable/c/468a729b78895893d0e580ceea49bed8ada2a2bd", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/6b5325f2457521bbece29499970c0117a648c620", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/842a97b5e44f0c8a9fc356fe976e0e13ddcf7783", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/cc7340f18e45886121c131227985d64ef666012f", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/d3af435e8ace119e58d8e21d3d2d6a4e7c4a4baa", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/f5e9a22d19bb98a7e86034db85eb295e94187caa", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/f8321fa75102246d7415a6af441872f6637c93ab", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://lists.debian.org/debian-lts-announce/2024/10/msg00003.html", "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": "nvd@nist.gov", "description": [{"lang": "en", "value": "NVD-CWE-noinfo"}]}], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nvirtio_net: Fix napi_skb_cache_put warning\n\nAfter the commit bdacf3e34945 (\"net: Use nested-BH locking for\nnapi_alloc_cache.\") was merged, the following warning began to appear:\n\n\t WARNING: CPU: 5 PID: 1 at net/core/skbuff.c:1451 napi_skb_cache_put+0x82/0x4b0\n\n\t __warn+0x12f/0x340\n\t napi_skb_cache_put+0x82/0x4b0\n\t napi_skb_cache_put+0x82/0x4b0\n\t report_bug+0x165/0x370\n\t handle_bug+0x3d/0x80\n\t exc_invalid_op+0x1a/0x50\n\t asm_exc_invalid_op+0x1a/0x20\n\t __free_old_xmit+0x1c8/0x510\n\t napi_skb_cache_put+0x82/0x4b0\n\t __free_old_xmit+0x1c8/0x510\n\t __free_old_xmit+0x1c8/0x510\n\t __pfx___free_old_xmit+0x10/0x10\n\nThe issue arises because virtio is assuming it's running in NAPI context\neven when it's not, such as in the netpoll case.\n\nTo resolve this, modify virtnet_poll_tx() to only set NAPI when budget\nis available. Same for virtnet_poll_cleantx(), which always assumed that\nit was in a NAPI context."}, {"lang": "es", "value": "En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: virtio_net: corrige la advertencia de napi_skb_cache_put Despu\u00e9s de que se fusion\u00f3 el commit bdacf3e34945 (\"net: Use bloqueo de BH anidado para napi_alloc_cache.\"), comenz\u00f3 a aparecer la siguiente advertencia: ADVERTENCIA: CPU: 5 PID: 1 en net/core/skbuff.c:1451 napi_skb_cache_put+0x82/0x4b0 __warn+0x12f/0x340 napi_skb_cache_put+0x82/0x4b0 napi_skb_cache_put+0x82/0x4b0 report_bug+0x165/0x370 x80 exc_invalid_op+0x1a/0x50 asm_exc_invalid_op+ 0x1a/0x20 __free_old_xmit+0x1c8/0x510 napi_skb_cache_put+0x82/0x4b0 __free_old_xmit+0x1c8/0x510 __free_old_xmit+0x1c8/0x510 __pfx___free_old_xmit+0x10/0x10 El problema surge porque virtio asumiendo que se est\u00e1 ejecutando en el contexto NAPI incluso cuando no lo es, como en netpoll caso. Para resolver esto, modifique virtnet_poll_tx() para configurar NAPI solo cuando haya presupuesto disponible. Lo mismo ocurre con virtnet_poll_cleantx(), que siempre asumi\u00f3 que estaba en un contexto NAPI."}], "lastModified": "2025-11-03T22:18:09.480", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "24574782-30C5-4044-BD18-A21100B2C80D", "versionEndExcluding": "6.10.3", "versionStartIncluding": "5.0"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}