CVE-2022-48890

{"id": "CVE-2022-48890", "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": "2024-08-21T07:15:05.303", "references": [{"url": "https://git.kernel.org/stable/c/67ff3d0a49f3d445c3922e30a54e03c161da561e", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/87c71e88f6a6619ffb1ff88f84dff48ef6d57adb", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-401"}]}], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: storvsc: Fix swiotlb bounce buffer leak in confidential VM\n\nstorvsc_queuecommand() maps the scatter/gather list using scsi_dma_map(),\nwhich in a confidential VM allocates swiotlb bounce buffers. If the I/O\nsubmission fails in storvsc_do_io(), the I/O is typically retried by higher\nlevel code, but the bounce buffer memory is never freed. The mostly like\ncause of I/O submission failure is a full VMBus channel ring buffer, which\nis not uncommon under high I/O loads. Eventually enough bounce buffer\nmemory leaks that the confidential VM can't do any I/O. The same problem\ncan arise in a non-confidential VM with kernel boot parameter\nswiotlb=force.\n\nFix this by doing scsi_dma_unmap() in the case of an I/O submission\nerror, which frees the bounce buffer memory."}, {"lang": "es", "value": "En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: scsi: storvsc: corrige la fuga del b\u00fafer de rebote swiotlb en una VM confidencial storvsc_queuecommand() asigna la lista de dispersi\u00f3n/recopilaci\u00f3n usando scsi_dma_map(), que en una VM confidencial asigna buffers de rebote swiotlb. Si el env\u00edo de E/S falla en storvsc_do_io(), la E/S normalmente se reintenta mediante c\u00f3digo de nivel superior, pero la memoria del b\u00fafer de rebote nunca se libera. La causa m\u00e1s com\u00fan de falla en el env\u00edo de E/S es un b\u00fafer de anillo de canal VMBus lleno, lo cual no es infrecuente bajo cargas de E/S elevadas. Con el tiempo, se pierden suficientes memorias del b\u00fafer de rebote como para que la m\u00e1quina virtual confidencial no pueda realizar ninguna E/S. El mismo problema puede surgir en una m\u00e1quina virtual no confidencial con el par\u00e1metro de arranque del kernel swiotlb=force. Solucione este problema haciendo scsi_dma_unmap() en el caso de un error de env\u00edo de E/S, lo que libera la memoria del b\u00fafer de rebote."}], "lastModified": "2024-09-06T15:11:16.120", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "96403C94-C711-476F-BE5F-C7510379207B", "versionEndExcluding": "6.1.7", "versionStartIncluding": "5.17"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.2:rc1:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "FF501633-2F44-4913-A8EE-B021929F49F6"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.2:rc2:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "2BDA597B-CAC1-4DF0-86F0-42E142C654E9"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.2:rc3:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "725C78C9-12CE-406F-ABE8-0813A01D66E8"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}