CVE-2024-26943

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As a result, if we dereference\nsrc_pfns, dst_pfns or dma_addrs, the null pointer dereference bugs\nwill happen.\n\nMoreover, the GPU is going away. If the kcalloc() fails, we could not\nevict all pages mapping a chunk. So this patch adds a __GFP_NOFAIL\nflag in kcalloc().\n\nFinally, as there is no need to have physically contiguous memory,\nthis patch switches kcalloc() to kvcalloc() in order to avoid\nfailing allocations."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: nouveau/dmem: maneja el error de asignaci\u00f3n de kcalloc() El kcalloc() en nouveau_dmem_evict_chunk() devolver\u00e1 nulo si la memoria f\u00edsica se ha agotado. Como resultado, si eliminamos la referencia a src_pfns, dst_pfns o dma_addrs, se producir\u00e1n errores de desreferenciaci\u00f3n del puntero nulo. Adem\u00e1s, la GPU est\u00e1 desapareciendo. Si kcalloc() falla, no podremos desalojar todas las p\u00e1ginas que asignan un fragmento. Entonces este parche agrega un indicador __GFP_NOFAIL en kcalloc(). Finalmente, como no es necesario tener memoria f\u00edsicamente contigua, este parche cambia kcalloc() a kvcalloc() para evitar asignaciones fallidas."}], "id": "CVE-2024-26943", "lastModified": "2026-06-17T07:18:45.190", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2024-26943", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2024-07-17T14:21:43.677577Z", "version": "2.0.3"}}]}, "published": "2024-05-01T06:15:09.877", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Mailing List", "Patch"], "url": "https://git.kernel.org/stable/c/16e87fe23d4af6df920406494ced5c0f4354567b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Mailing List", "Patch"], "url": "https://git.kernel.org/stable/c/2a84744a037b8a511d6a9055f3defddc28ff4a4d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Mailing List", "Patch"], "url": "https://git.kernel.org/stable/c/3e82f7383e0b82a835e6b6b06a348b2bc4e2c2ee"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Mailing List", "Patch"], "url": "https://git.kernel.org/stable/c/5e81773757a95fc298e96cfd6d4700f07b6192a2"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Mailing List", "Patch"], "url": "https://git.kernel.org/stable/c/9acfd8b083a0ffbd387566800d89f55058a68af2"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List", "Patch"], "url": "https://git.kernel.org/stable/c/16e87fe23d4af6df920406494ced5c0f4354567b"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List", "Patch"], "url": "https://git.kernel.org/stable/c/2a84744a037b8a511d6a9055f3defddc28ff4a4d"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List", "Patch"], "url": "https://git.kernel.org/stable/c/3e82f7383e0b82a835e6b6b06a348b2bc4e2c2ee"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List", "Patch"], "url": "https://git.kernel.org/stable/c/5e81773757a95fc298e96cfd6d4700f07b6192a2"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List", "Patch"], "url": "https://git.kernel.org/stable/c/9acfd8b083a0ffbd387566800d89f55058a68af2"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-476"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: nouveau/dmem: handle kcalloc() allocation failure", "id": "2278212", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2278212"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "details": ["In the Linux kernel, the following vulnerability has been resolved:\nnouveau/dmem: handle kcalloc() allocation failure\nThe kcalloc() in nouveau_dmem_evict_chunk() will return null if\nthe physical memory has run out. As a result, if we dereference\nsrc_pfns, dst_pfns or dma_addrs, the null pointer dereference bugs\nwill happen.\nMoreover, the GPU is going away. If the kcalloc() fails, we could not\nevict all pages mapping a chunk. So this patch adds a __GFP_NOFAIL\nflag in kcalloc().\nFinally, as there is no need to have physically contiguous memory,\nthis patch switches kcalloc() to kvcalloc() in order to avoid\nfailing allocations."], "name": "CVE-2024-26943", "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": "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": "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": "2024-05-01T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2024-26943\nhttps://nvd.nist.gov/vuln/detail/CVE-2024-26943\nhttps://lore.kernel.org/linux-cve-announce/2024050125-CVE-2024-26943-9ea5@gregkh/T"], "threat_severity": "Moderate"}

{"created": "2025-07-12T22:09:54.808223+00:00", "updated": "2025-07-12T22:09:54.808274+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}