{"api_version":"1","generated_at":"2026-09-05T05:18:21+00:00","cve":"CVE-2026-80620","urls":{"html":"https://cve.report/CVE-2026-80620","api":"https://cve.report/api/cve/CVE-2026-80620.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-80620","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-80620"},"summary":{"title":"Revert \"PCI/MSI: Unmap MSI-X region on error\"","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nRevert \"PCI/MSI: Unmap MSI-X region on error\"\n\nThis reverts commit 1a8d4c6ecb4c81261bcdf13556abd4a958eca202.\n\nCommit 1a8d4c6ecb4c (\"PCI/MSI: Unmap MSI-X region on error\") added an\niounmap(dev->msix_base) on the error path of msix_capability_init() to\nrelease the MSI-X region when msix_setup_interrupts() fails.\n\nWhen msix_setup_interrupts() fails, the call chain is:\n\n  msix_setup_interrupts()\n    -> __msix_setup_interrupts()\n         struct pci_dev *dev __free(free_msi_irqs) = __dev;\n         ...\n         return ret;  // __free cleanup fires on error\n\nThe __free(free_msi_irqs) cleanup calls pci_free_msi_irqs(), which\nalready handles the unmap:\n\n  void pci_free_msi_irqs(struct pci_dev *dev)\n  {\n      pci_msi_teardown_msi_irqs(dev);\n      if (dev->msix_base) {\n          iounmap(dev->msix_base);   // already unmapped here\n          dev->msix_base = NULL;     // and set to NULL\n      }\n  }\n\nSo dev->msix_base is unmapped and set to NULL before\nmsix_setup_interrupts() returns to msix_capability_init(). The\n\"goto out_unmap\" introduced by commit 1a8d4c6ecb4c (\"PCI/MSI: Unmap\nMSI-X region on error\") then calls iounmap() a second time on a NULL\npointer.\n\nThis was reproduced on Intel Emerald Rapids (192 CPUs) while\nrunning tools/testing/selftests/kexec/test_kexec_jump.sh:\n\n  WARNING: CPU#44 at iounmap+0x2a/0xe0\n  RIP: 0010:iounmap+0x2a/0xe0\n  RDI: 0000000000000000\n  Call Trace:\n   msix_capability_init+0x317/0x3f0\n   __pci_enable_msix_range+0x21d/0x2c0\n   pci_alloc_irq_vectors_affinity+0xa9/0x130\n   nvme_setup_io_queues+0x2a8/0x420 [nvme]\n   nvme_reset_work+0x151/0x340 [nvme]\n   ...\n\nRDI=0 confirms iounmap() is called with NULL.\n\nRestore the original \"goto out_disable\" and leave the unmap to the\nexisting __free(free_msi_irqs) cleanup.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-08-28 08:16:46","updated_at":"2026-08-28 08:16:46"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/f79519f636059b007d6abc91652f36dea4f54a20","name":"https://git.kernel.org/stable/c/f79519f636059b007d6abc91652f36dea4f54a20","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/3691a82be2095abaf3326a1cbf7b25858a1d959c","name":"https://git.kernel.org/stable/c/3691a82be2095abaf3326a1cbf7b25858a1d959c","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/f64e03da0d83cb173743888bff4a7e61476a8fc2","name":"https://git.kernel.org/stable/c/f64e03da0d83cb173743888bff4a7e61476a8fc2","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/82e120a7dd566c476ba923d30e3fb78e8118a1dd","name":"https://git.kernel.org/stable/c/82e120a7dd566c476ba923d30e3fb78e8118a1dd","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/0a2aeb02894b839ecc3ece6dc7e5c3d6c3def16f","name":"https://git.kernel.org/stable/c/0a2aeb02894b839ecc3ece6dc7e5c3d6c3def16f","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/6848ca381edff84f87dd1b6973848c271541e813","name":"https://git.kernel.org/stable/c/6848ca381edff84f87dd1b6973848c271541e813","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-80620","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-80620","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 4a7589b615a3db6792d36b874add86cd22188c95 82e120a7dd566c476ba923d30e3fb78e8118a1dd git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5f007c6acaa7d9a543b492c1e48c48a0ea1d7147 6848ca381edff84f87dd1b6973848c271541e813 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 76f7abd4ee0188f06465bdd3c053fdc5e8595152 0a2aeb02894b839ecc3ece6dc7e5c3d6c3def16f git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected aee8db5f048616990dbdefcc25689ade0a2620ec f79519f636059b007d6abc91652f36dea4f54a20 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1a8d4c6ecb4c81261bcdf13556abd4a958eca202 3691a82be2095abaf3326a1cbf7b25858a1d959c git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1a8d4c6ecb4c81261bcdf13556abd4a958eca202 f64e03da0d83cb173743888bff4a7e61476a8fc2 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 19bf27b450fcd5309bacd614b12bd7de1ac6535b git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.1.165 6.1.178 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.6.128 6.6.145 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.12.75 6.12.97 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.18.16 6.18.40 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.19.6 6.20 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 7.0","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.0 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1.178 6.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.145 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.97 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.40 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1.5 7.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"80620","cve":"CVE-2026-80620","epss":"0.001720000","percentile":"0.067790000","score_date":"2026-08-30","updated_at":"2026-08-31 00:14:06"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/pci/msi/msi.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"82e120a7dd566c476ba923d30e3fb78e8118a1dd","status":"affected","version":"4a7589b615a3db6792d36b874add86cd22188c95","versionType":"git"},{"lessThan":"6848ca381edff84f87dd1b6973848c271541e813","status":"affected","version":"5f007c6acaa7d9a543b492c1e48c48a0ea1d7147","versionType":"git"},{"lessThan":"0a2aeb02894b839ecc3ece6dc7e5c3d6c3def16f","status":"affected","version":"76f7abd4ee0188f06465bdd3c053fdc5e8595152","versionType":"git"},{"lessThan":"f79519f636059b007d6abc91652f36dea4f54a20","status":"affected","version":"aee8db5f048616990dbdefcc25689ade0a2620ec","versionType":"git"},{"lessThan":"3691a82be2095abaf3326a1cbf7b25858a1d959c","status":"affected","version":"1a8d4c6ecb4c81261bcdf13556abd4a958eca202","versionType":"git"},{"lessThan":"f64e03da0d83cb173743888bff4a7e61476a8fc2","status":"affected","version":"1a8d4c6ecb4c81261bcdf13556abd4a958eca202","versionType":"git"},{"status":"affected","version":"19bf27b450fcd5309bacd614b12bd7de1ac6535b","versionType":"git"},{"lessThan":"6.1.178","status":"affected","version":"6.1.165","versionType":"semver"},{"lessThan":"6.6.145","status":"affected","version":"6.6.128","versionType":"semver"},{"lessThan":"6.12.97","status":"affected","version":"6.12.75","versionType":"semver"},{"lessThan":"6.18.40","status":"affected","version":"6.18.16","versionType":"semver"},{"lessThan":"6.20","status":"affected","version":"6.19.6","versionType":"semver"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/pci/msi/msi.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"7.0"},{"lessThan":"7.0","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.178","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.145","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.97","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.40","versionType":"semver"},{"lessThanOrEqual":"7.1.*","status":"unaffected","version":"7.1.5","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.2","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.178","versionStartIncluding":"6.1.165","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.145","versionStartIncluding":"6.6.128","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.97","versionStartIncluding":"6.12.75","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.40","versionStartIncluding":"6.18.16","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1.5","versionStartIncluding":"7.0","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2","versionStartIncluding":"7.0","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.19.6","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nRevert \"PCI/MSI: Unmap MSI-X region on error\"\n\nThis reverts commit 1a8d4c6ecb4c81261bcdf13556abd4a958eca202.\n\nCommit 1a8d4c6ecb4c (\"PCI/MSI: Unmap MSI-X region on error\") added an\niounmap(dev->msix_base) on the error path of msix_capability_init() to\nrelease the MSI-X region when msix_setup_interrupts() fails.\n\nWhen msix_setup_interrupts() fails, the call chain is:\n\n  msix_setup_interrupts()\n    -> __msix_setup_interrupts()\n         struct pci_dev *dev __free(free_msi_irqs) = __dev;\n         ...\n         return ret;  // __free cleanup fires on error\n\nThe __free(free_msi_irqs) cleanup calls pci_free_msi_irqs(), which\nalready handles the unmap:\n\n  void pci_free_msi_irqs(struct pci_dev *dev)\n  {\n      pci_msi_teardown_msi_irqs(dev);\n      if (dev->msix_base) {\n          iounmap(dev->msix_base);   // already unmapped here\n          dev->msix_base = NULL;     // and set to NULL\n      }\n  }\n\nSo dev->msix_base is unmapped and set to NULL before\nmsix_setup_interrupts() returns to msix_capability_init(). The\n\"goto out_unmap\" introduced by commit 1a8d4c6ecb4c (\"PCI/MSI: Unmap\nMSI-X region on error\") then calls iounmap() a second time on a NULL\npointer.\n\nThis was reproduced on Intel Emerald Rapids (192 CPUs) while\nrunning tools/testing/selftests/kexec/test_kexec_jump.sh:\n\n  WARNING: CPU#44 at iounmap+0x2a/0xe0\n  RIP: 0010:iounmap+0x2a/0xe0\n  RDI: 0000000000000000\n  Call Trace:\n   msix_capability_init+0x317/0x3f0\n   __pci_enable_msix_range+0x21d/0x2c0\n   pci_alloc_irq_vectors_affinity+0xa9/0x130\n   nvme_setup_io_queues+0x2a8/0x420 [nvme]\n   nvme_reset_work+0x151/0x340 [nvme]\n   ...\n\nRDI=0 confirms iounmap() is called with NULL.\n\nRestore the original \"goto out_disable\" and leave the unmap to the\nexisting __free(free_msi_irqs) cleanup."}],"providerMetadata":{"dateUpdated":"2026-08-28T06:48:40.340Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/82e120a7dd566c476ba923d30e3fb78e8118a1dd"},{"url":"https://git.kernel.org/stable/c/6848ca381edff84f87dd1b6973848c271541e813"},{"url":"https://git.kernel.org/stable/c/0a2aeb02894b839ecc3ece6dc7e5c3d6c3def16f"},{"url":"https://git.kernel.org/stable/c/f79519f636059b007d6abc91652f36dea4f54a20"},{"url":"https://git.kernel.org/stable/c/3691a82be2095abaf3326a1cbf7b25858a1d959c"},{"url":"https://git.kernel.org/stable/c/f64e03da0d83cb173743888bff4a7e61476a8fc2"}],"title":"Revert \"PCI/MSI: Unmap MSI-X region on error\"","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-80620","datePublished":"2026-08-28T06:48:40.340Z","dateReserved":"2026-08-26T14:34:25.774Z","dateUpdated":"2026-08-28T06:48:40.340Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-08-28 08:16:46","lastModifiedDate":"2026-08-28 08:16:46","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"80620","Ordinal":"1","Title":"Revert \"PCI/MSI: Unmap MSI-X region on error\"","CVE":"CVE-2026-80620","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"80620","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nRevert \"PCI/MSI: Unmap MSI-X region on error\"\n\nThis reverts commit 1a8d4c6ecb4c81261bcdf13556abd4a958eca202.\n\nCommit 1a8d4c6ecb4c (\"PCI/MSI: Unmap MSI-X region on error\") added an\niounmap(dev->msix_base) on the error path of msix_capability_init() to\nrelease the MSI-X region when msix_setup_interrupts() fails.\n\nWhen msix_setup_interrupts() fails, the call chain is:\n\n  msix_setup_interrupts()\n    -> __msix_setup_interrupts()\n         struct pci_dev *dev __free(free_msi_irqs) = __dev;\n         ...\n         return ret;  // __free cleanup fires on error\n\nThe __free(free_msi_irqs) cleanup calls pci_free_msi_irqs(), which\nalready handles the unmap:\n\n  void pci_free_msi_irqs(struct pci_dev *dev)\n  {\n      pci_msi_teardown_msi_irqs(dev);\n      if (dev->msix_base) {\n          iounmap(dev->msix_base);   // already unmapped here\n          dev->msix_base = NULL;     // and set to NULL\n      }\n  }\n\nSo dev->msix_base is unmapped and set to NULL before\nmsix_setup_interrupts() returns to msix_capability_init(). The\n\"goto out_unmap\" introduced by commit 1a8d4c6ecb4c (\"PCI/MSI: Unmap\nMSI-X region on error\") then calls iounmap() a second time on a NULL\npointer.\n\nThis was reproduced on Intel Emerald Rapids (192 CPUs) while\nrunning tools/testing/selftests/kexec/test_kexec_jump.sh:\n\n  WARNING: CPU#44 at iounmap+0x2a/0xe0\n  RIP: 0010:iounmap+0x2a/0xe0\n  RDI: 0000000000000000\n  Call Trace:\n   msix_capability_init+0x317/0x3f0\n   __pci_enable_msix_range+0x21d/0x2c0\n   pci_alloc_irq_vectors_affinity+0xa9/0x130\n   nvme_setup_io_queues+0x2a8/0x420 [nvme]\n   nvme_reset_work+0x151/0x340 [nvme]\n   ...\n\nRDI=0 confirms iounmap() is called with NULL.\n\nRestore the original \"goto out_disable\" and leave the unmap to the\nexisting __free(free_msi_irqs) cleanup.","Type":"Description","Title":"Revert \"PCI/MSI: Unmap MSI-X region on error\""}]}}}