{"id":"CVE-2022-48890","state":"PUBLISHED","title":"scsi: storvsc: Fix swiotlb bounce buffer leak in confidential VM","description":"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.","publishedAt":"2024-08-21T06:10:22.243Z","updatedAt":"2026-05-11T18:49:09.678Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"743b237c3a7b0f5b44aa704aae8a1058877b6322","status":"affected","lessThan":"87c71e88f6a6619ffb1ff88f84dff48ef6d57adb","versionType":"git"},{"version":"743b237c3a7b0f5b44aa704aae8a1058877b6322","status":"affected","lessThan":"67ff3d0a49f3d445c3922e30a54e03c161da561e","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/scsi/storvsc_drv.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.17","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.17","versionType":"semver"},{"version":"6.1.7","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/scsi/storvsc_drv.c"]}],"references":["https://git.kernel.org/stable/c/87c71e88f6a6619ffb1ff88f84dff48ef6d57adb","https://git.kernel.org/stable/c/67ff3d0a49f3d445c3922e30a54e03c161da561e"],"weaknesses":[],"ingestedAt":"2026-10-29T20:05:26.763Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2022/48xxx/CVE-2022-48890.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2022-48890","state":"PUBLISHED","datePublished":"2024-08-21T06:10:22.243Z","dateUpdated":"2026-05-11T18:49:09.678Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2024-08-21T06:06:23.290Z"},"containers":{"cna":{"title":"scsi: storvsc: Fix swiotlb bounce buffer leak in confidential VM","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."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"743b237c3a7b0f5b44aa704aae8a1058877b6322","status":"affected","lessThan":"87c71e88f6a6619ffb1ff88f84dff48ef6d57adb","versionType":"git"},{"version":"743b237c3a7b0f5b44aa704aae8a1058877b6322","status":"affected","lessThan":"67ff3d0a49f3d445c3922e30a54e03c161da561e","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/scsi/storvsc_drv.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.17","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.17","versionType":"semver"},{"version":"6.1.7","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/scsi/storvsc_drv.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/87c71e88f6a6619ffb1ff88f84dff48ef6d57adb"},{"url":"https://git.kernel.org/stable/c/67ff3d0a49f3d445c3922e30a54e03c161da561e"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-11T18:49:09.678Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.17","versionEndExcluding":"6.1.7"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.17","versionEndExcluding":"6.2"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2022-48890","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"version":"2.0.3","timestamp":"2024-09-10T16:04:25.311779Z"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2024-09-12T17:32:55.107Z"}}]}}}