{"api_version":"1","generated_at":"2026-07-23T15:00:56+00:00","cve":"CVE-2026-43128","urls":{"html":"https://cve.report/CVE-2026-43128","api":"https://cve.report/api/cve/CVE-2026-43128.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-43128","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-43128"},"summary":{"title":"RDMA/umem: Fix double dma_buf_unpin in failure path","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/umem: Fix double dma_buf_unpin in failure path\n\nIn ib_umem_dmabuf_get_pinned_with_dma_device(), the call to\nib_umem_dmabuf_map_pages() can fail. If this occurs, the dmabuf\nis immediately unpinned but the umem_dmabuf->pinned flag is still\nset. Then, when ib_umem_release() is called, it calls\nib_umem_dmabuf_revoke() which will call dma_buf_unpin() again.\n\nFix this by removing the immediate unpin upon failure and just let\nthe ib_umem_release/revoke path handle it. This also ensures the\nproper unmap-unpin unwind ordering if the dmabuf_map_pages call\nhappened to fail due to dma_resv_wait_timeout (and therefore has\na non-NULL umem_dmabuf->sgt).","state":"PUBLISHED","assigner":"Linux","published_at":"2026-05-06 12:16:29","updated_at":"2026-05-08 17:52:13"},"problem_types":["CWE-415"],"metrics":[{"version":"3.1","source":"nvd@nist.gov","type":"Primary","score":"7.8","severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","data":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","baseScore":7.8,"baseSeverity":"HIGH","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"}},{"version":"3.1","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","type":"Secondary","score":"7.8","severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","data":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","baseScore":7.8,"baseSeverity":"HIGH","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"}},{"version":"3.1","source":"CNA","type":"DECLARED","score":"7.8","severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","data":{"baseScore":7.8,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"}}],"references":[{"url":"https://git.kernel.org/stable/c/d3e32e2f3262f1b25d77c085ace38e2cc4ad75cf","name":"https://git.kernel.org/stable/c/d3e32e2f3262f1b25d77c085ace38e2cc4ad75cf","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/104016eb671e19709721c1b0048dd912dc2e96be","name":"https://git.kernel.org/stable/c/104016eb671e19709721c1b0048dd912dc2e96be","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/70542b69abff34d24b11ae0bb200cc7a766d18df","name":"https://git.kernel.org/stable/c/70542b69abff34d24b11ae0bb200cc7a766d18df","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/ba3bf0f1bf1d5d0404678485e872980532fcc2c4","name":"https://git.kernel.org/stable/c/ba3bf0f1bf1d5d0404678485e872980532fcc2c4","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/40126bcbefa79ea86672e05dae608596bab38319","name":"https://git.kernel.org/stable/c/40126bcbefa79ea86672e05dae608596bab38319","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/b324327ff6f48d8065dca67eb3b91357e72726bd","name":"https://git.kernel.org/stable/c/b324327ff6f48d8065dca67eb3b91357e72726bd","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-43128","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-43128","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1e4df4a21c5ac722df1099eee30cad9246c889b5 70542b69abff34d24b11ae0bb200cc7a766d18df git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1e4df4a21c5ac722df1099eee30cad9246c889b5 b324327ff6f48d8065dca67eb3b91357e72726bd git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1e4df4a21c5ac722df1099eee30cad9246c889b5 ba3bf0f1bf1d5d0404678485e872980532fcc2c4 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1e4df4a21c5ac722df1099eee30cad9246c889b5 d3e32e2f3262f1b25d77c085ace38e2cc4ad75cf git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 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the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/umem: Fix double dma_buf_unpin in failure path\n\nIn ib_umem_dmabuf_get_pinned_with_dma_device(), the call to\nib_umem_dmabuf_map_pages() can fail. If this occurs, the dmabuf\nis immediately unpinned but the umem_dmabuf->pinned flag is still\nset. Then, when ib_umem_release() is called, it calls\nib_umem_dmabuf_revoke() which will call dma_buf_unpin() again.\n\nFix this by removing the immediate unpin upon failure and just let\nthe ib_umem_release/revoke path handle it. This also ensures the\nproper unmap-unpin unwind ordering if the dmabuf_map_pages call\nhappened to fail due to dma_resv_wait_timeout (and therefore has\na non-NULL umem_dmabuf->sgt)."}],"metrics":[{"cvssV3_1":{"baseScore":7.8,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"}}],"providerMetadata":{"dateUpdated":"2026-05-08T12:40:46.828Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/70542b69abff34d24b11ae0bb200cc7a766d18df"},{"url":"https://git.kernel.org/stable/c/b324327ff6f48d8065dca67eb3b91357e72726bd"},{"url":"https://git.kernel.org/stable/c/ba3bf0f1bf1d5d0404678485e872980532fcc2c4"},{"url":"https://git.kernel.org/stable/c/d3e32e2f3262f1b25d77c085ace38e2cc4ad75cf"},{"url":"https://git.kernel.org/stable/c/40126bcbefa79ea86672e05dae608596bab38319"},{"url":"https://git.kernel.org/stable/c/104016eb671e19709721c1b0048dd912dc2e96be"}],"title":"RDMA/umem: Fix double dma_buf_unpin in failure path","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-43128","datePublished":"2026-05-06T11:27:17.474Z","dateReserved":"2026-05-01T14:12:55.988Z","dateUpdated":"2026-05-08T12:40:46.828Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-05-06 12:16:29","lastModifiedDate":"2026-05-08 17:52:13","problem_types":["CWE-415"],"metrics":{"cvssMetricV31":[{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","baseScore":7.8,"baseSeverity":"HIGH","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"},"exploitabilityScore":1.8,"impactScore":5.9},{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","baseScore":7.8,"baseSeverity":"HIGH","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"},"exploitabilityScore":1.8,"impactScore":5.9}]},"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.16","versionEndExcluding":"6.1.165","matchCriteriaId":"797C7F46-D0BE-4FB8-A502-C5EF8E6B6654"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.2","versionEndExcluding":"6.6.128","matchCriteriaId":"851E9353-6C09-4CC9-877E-E09DB164A3C2"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.7","versionEndExcluding":"6.12.75","matchCriteriaId":"BCE16369-98ED-41CF-8995-DFDC10B288D2"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.13","versionEndExcluding":"6.18.16","matchCriteriaId":"B4B8CDA9-BADF-4CF5-8B3B-702DE8EEA40B"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.19","versionEndExcluding":"6.19.6","matchCriteriaId":"373EEEDA-FAA1-4FB4-B6ED-DB4DD99DBE67"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:*","matchCriteriaId":"F253B622-8837-4245-BCE5-A7BF8FC76A16"}]}]}]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"43128","Ordinal":"1","Title":"RDMA/umem: Fix double dma_buf_unpin in failure path","CVE":"CVE-2026-43128","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"43128","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/umem: Fix double dma_buf_unpin in failure path\n\nIn ib_umem_dmabuf_get_pinned_with_dma_device(), the call to\nib_umem_dmabuf_map_pages() can fail. If this occurs, the dmabuf\nis immediately unpinned but the umem_dmabuf->pinned flag is still\nset. Then, when ib_umem_release() is called, it calls\nib_umem_dmabuf_revoke() which will call dma_buf_unpin() again.\n\nFix this by removing the immediate unpin upon failure and just let\nthe ib_umem_release/revoke path handle it. This also ensures the\nproper unmap-unpin unwind ordering if the dmabuf_map_pages call\nhappened to fail due to dma_resv_wait_timeout (and therefore has\na non-NULL umem_dmabuf->sgt).","Type":"Description","Title":"RDMA/umem: Fix double dma_buf_unpin in failure path"}]}}}