{"api_version":"1","generated_at":"2026-07-23T12:11:10+00:00","cve":"CVE-2026-43147","urls":{"html":"https://cve.report/CVE-2026-43147","api":"https://cve.report/api/cve/CVE-2026-43147.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-43147","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-43147"},"summary":{"title":"Revert \"PCI/IOV: Add PCI rescan-remove locking when enabling/disabling SR-IOV\"","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nRevert \"PCI/IOV: Add PCI rescan-remove locking when enabling/disabling SR-IOV\"\n\nThis reverts commit 05703271c3cd (\"PCI/IOV: Add PCI rescan-remove locking\nwhen enabling/disabling SR-IOV\"), which causes a deadlock by recursively\ntaking pci_rescan_remove_lock when sriov_del_vfs() is called as part of\npci_stop_and_remove_bus_device(). For example with the following sequence\nof commands:\n\n  $ echo <NUM> > /sys/bus/pci/devices/<pf>/sriov_numvfs\n  $ echo 1 > /sys/bus/pci/devices/<pf>/remove\n\nA trimmed trace of the deadlock on a mlx5 device is as below:\n\n  zsh/5715 is trying to acquire lock:\n  000002597926ef50 (pci_rescan_remove_lock){+.+.}-{3:3}, at: sriov_disable+0x34/0x140\n\n  but task is already holding lock:\n  000002597926ef50 (pci_rescan_remove_lock){+.+.}-{3:3}, at: pci_stop_and_remove_bus_device_locked+0x24/0x80\n  ...\n  Call Trace:\n   [<00000259778c4f90>] dump_stack_lvl+0xc0/0x110\n   [<00000259779c844e>] print_deadlock_bug+0x31e/0x330\n   [<00000259779c1908>] __lock_acquire+0x16c8/0x32f0\n   [<00000259779bffac>] lock_acquire+0x14c/0x350\n   [<00000259789643a6>] __mutex_lock_common+0xe6/0x1520\n   [<000002597896413c>] mutex_lock_nested+0x3c/0x50\n   [<00000259784a07e4>] sriov_disable+0x34/0x140\n   [<00000258f7d6dd80>] mlx5_sriov_disable+0x50/0x80 [mlx5_core]\n   [<00000258f7d5745e>] remove_one+0x5e/0xf0 [mlx5_core]\n   [<00000259784857fc>] pci_device_remove+0x3c/0xa0\n   [<000002597851012e>] device_release_driver_internal+0x18e/0x280\n   [<000002597847ae22>] pci_stop_bus_device+0x82/0xa0\n   [<000002597847afce>] pci_stop_and_remove_bus_device_locked+0x5e/0x80\n   [<00000259784972c2>] remove_store+0x72/0x90\n   [<0000025977e6661a>] kernfs_fop_write_iter+0x15a/0x200\n   [<0000025977d7241c>] vfs_write+0x24c/0x300\n   [<0000025977d72696>] ksys_write+0x86/0x110\n   [<000002597895b61c>] __do_syscall+0x14c/0x400\n   [<000002597896e0ee>] system_call+0x6e/0x90\n\nThis alone is not a complete fix as it restores the issue the cited commit\ntried to solve. A new fix will be provided as a follow on.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-05-06 12:16:32","updated_at":"2026-05-13 20:18:47"},"problem_types":["CWE-667"],"metrics":[{"version":"3.1","source":"nvd@nist.gov","type":"Primary","score":"5.5","severity":"MEDIUM","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","data":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","baseScore":5.5,"baseSeverity":"MEDIUM","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"}}],"references":[{"url":"https://git.kernel.org/stable/c/83651d37474c762920e345a3a0828f975ca4d732","name":"https://git.kernel.org/stable/c/83651d37474c762920e345a3a0828f975ca4d732","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/2fa119c0e5e528453ebae9e70740e8d2d8c0ed5a","name":"https://git.kernel.org/stable/c/2fa119c0e5e528453ebae9e70740e8d2d8c0ed5a","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/f61cdd7e9b67bb8961b0a81bf294b78343e5db05","name":"https://git.kernel.org/stable/c/f61cdd7e9b67bb8961b0a81bf294b78343e5db05","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/40f67686a5002c0c322fac918406bbc8d9c2ec2f","name":"https://git.kernel.org/stable/c/40f67686a5002c0c322fac918406bbc8d9c2ec2f","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/58677783c89681871077f50a7042b0c6380c4fd8","name":"https://git.kernel.org/stable/c/58677783c89681871077f50a7042b0c6380c4fd8","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/d47f27e145f8bd13f3c230da5e3af29225b4a2f7","name":"https://git.kernel.org/stable/c/d47f27e145f8bd13f3c230da5e3af29225b4a2f7","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/639265296fe6ee21b6f00e00ee2bab65f3b07252","name":"https://git.kernel.org/stable/c/639265296fe6ee21b6f00e00ee2bab65f3b07252","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/0de341b2365bad430aade0853fe09c2cbe468f59","name":"https://git.kernel.org/stable/c/0de341b2365bad430aade0853fe09c2cbe468f59","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-43147","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-43147","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1e8a80290f964bdbad225221c8a1594c7e01c8fd f61cdd7e9b67bb8961b0a81bf294b78343e5db05 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected a645ca21de09e3137cbb224fa6c23cca873a1d01 0de341b2365bad430aade0853fe09c2cbe468f59 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected a24219172456f035d886857e265ca24c85b167c8 83651d37474c762920e345a3a0828f975ca4d732 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 36039348bca77828bf06eae41b8f76e38cd15847 639265296fe6ee21b6f00e00ee2bab65f3b07252 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 53154cd40ccf285f1d1c24367824082061d155bd d47f27e145f8bd13f3c230da5e3af29225b4a2f7 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 05703271c3cdcc0f2a8cf6ebdc45892b8ca83520 40f67686a5002c0c322fac918406bbc8d9c2ec2f git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 05703271c3cdcc0f2a8cf6ebdc45892b8ca83520 58677783c89681871077f50a7042b0c6380c4fd8 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 05703271c3cdcc0f2a8cf6ebdc45892b8ca83520 2fa119c0e5e528453ebae9e70740e8d2d8c0ed5a git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5c1cd7d405e94dc6cb320cc0cc092b74895b6ddf git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected ee40e5db052d7c6f406fdb95ad639c894c74674c git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.18","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.10.252 5.10.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.15.202 5.15.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1.165 6.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.128 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.75 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.16 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.19.6 6.19.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.0 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[{"cve_year":"2026","cve_id":"43147","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"linux","cpe5":"linux_kernel","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"}],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/pci/iov.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"f61cdd7e9b67bb8961b0a81bf294b78343e5db05","status":"affected","version":"1e8a80290f964bdbad225221c8a1594c7e01c8fd","versionType":"git"},{"lessThan":"0de341b2365bad430aade0853fe09c2cbe468f59","status":"affected","version":"a645ca21de09e3137cbb224fa6c23cca873a1d01","versionType":"git"},{"lessThan":"83651d37474c762920e345a3a0828f975ca4d732","status":"affected","version":"a24219172456f035d886857e265ca24c85b167c8","versionType":"git"},{"lessThan":"639265296fe6ee21b6f00e00ee2bab65f3b07252","status":"affected","version":"36039348bca77828bf06eae41b8f76e38cd15847","versionType":"git"},{"lessThan":"d47f27e145f8bd13f3c230da5e3af29225b4a2f7","status":"affected","version":"53154cd40ccf285f1d1c24367824082061d155bd","versionType":"git"},{"lessThan":"40f67686a5002c0c322fac918406bbc8d9c2ec2f","status":"affected","version":"05703271c3cdcc0f2a8cf6ebdc45892b8ca83520","versionType":"git"},{"lessThan":"58677783c89681871077f50a7042b0c6380c4fd8","status":"affected","version":"05703271c3cdcc0f2a8cf6ebdc45892b8ca83520","versionType":"git"},{"lessThan":"2fa119c0e5e528453ebae9e70740e8d2d8c0ed5a","status":"affected","version":"05703271c3cdcc0f2a8cf6ebdc45892b8ca83520","versionType":"git"},{"status":"affected","version":"5c1cd7d405e94dc6cb320cc0cc092b74895b6ddf","versionType":"git"},{"status":"affected","version":"ee40e5db052d7c6f406fdb95ad639c894c74674c","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/pci/iov.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.18"},{"lessThan":"6.18","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.10.*","status":"unaffected","version":"5.10.252","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.202","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.165","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.128","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.75","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.16","versionType":"semver"},{"lessThanOrEqual":"6.19.*","status":"unaffected","version":"6.19.6","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.0","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.10.252","versionStartIncluding":"5.10.246","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.15.202","versionStartIncluding":"5.15.195","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.165","versionStartIncluding":"6.1.157","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.128","versionStartIncluding":"6.6.113","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.75","versionStartIncluding":"6.12.54","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.16","versionStartIncluding":"6.18","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.19.6","versionStartIncluding":"6.18","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.0","versionStartIncluding":"6.18","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.4.301","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.17.4","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nRevert \"PCI/IOV: Add PCI rescan-remove locking when enabling/disabling SR-IOV\"\n\nThis reverts commit 05703271c3cd (\"PCI/IOV: Add PCI rescan-remove locking\nwhen enabling/disabling SR-IOV\"), which causes a deadlock by recursively\ntaking pci_rescan_remove_lock when sriov_del_vfs() is called as part of\npci_stop_and_remove_bus_device(). For example with the following sequence\nof commands:\n\n  $ echo <NUM> > /sys/bus/pci/devices/<pf>/sriov_numvfs\n  $ echo 1 > /sys/bus/pci/devices/<pf>/remove\n\nA trimmed trace of the deadlock on a mlx5 device is as below:\n\n  zsh/5715 is trying to acquire lock:\n  000002597926ef50 (pci_rescan_remove_lock){+.+.}-{3:3}, at: sriov_disable+0x34/0x140\n\n  but task is already holding lock:\n  000002597926ef50 (pci_rescan_remove_lock){+.+.}-{3:3}, at: pci_stop_and_remove_bus_device_locked+0x24/0x80\n  ...\n  Call Trace:\n   [<00000259778c4f90>] dump_stack_lvl+0xc0/0x110\n   [<00000259779c844e>] print_deadlock_bug+0x31e/0x330\n   [<00000259779c1908>] __lock_acquire+0x16c8/0x32f0\n   [<00000259779bffac>] lock_acquire+0x14c/0x350\n   [<00000259789643a6>] __mutex_lock_common+0xe6/0x1520\n   [<000002597896413c>] mutex_lock_nested+0x3c/0x50\n   [<00000259784a07e4>] sriov_disable+0x34/0x140\n   [<00000258f7d6dd80>] mlx5_sriov_disable+0x50/0x80 [mlx5_core]\n   [<00000258f7d5745e>] remove_one+0x5e/0xf0 [mlx5_core]\n   [<00000259784857fc>] pci_device_remove+0x3c/0xa0\n   [<000002597851012e>] device_release_driver_internal+0x18e/0x280\n   [<000002597847ae22>] pci_stop_bus_device+0x82/0xa0\n   [<000002597847afce>] pci_stop_and_remove_bus_device_locked+0x5e/0x80\n   [<00000259784972c2>] remove_store+0x72/0x90\n   [<0000025977e6661a>] kernfs_fop_write_iter+0x15a/0x200\n   [<0000025977d7241c>] vfs_write+0x24c/0x300\n   [<0000025977d72696>] ksys_write+0x86/0x110\n   [<000002597895b61c>] __do_syscall+0x14c/0x400\n   [<000002597896e0ee>] system_call+0x6e/0x90\n\nThis alone is not a complete fix as it restores the issue the cited commit\ntried to solve. A new fix will be provided as a follow on."}],"providerMetadata":{"dateUpdated":"2026-05-11T22:18:40.286Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/f61cdd7e9b67bb8961b0a81bf294b78343e5db05"},{"url":"https://git.kernel.org/stable/c/0de341b2365bad430aade0853fe09c2cbe468f59"},{"url":"https://git.kernel.org/stable/c/83651d37474c762920e345a3a0828f975ca4d732"},{"url":"https://git.kernel.org/stable/c/639265296fe6ee21b6f00e00ee2bab65f3b07252"},{"url":"https://git.kernel.org/stable/c/d47f27e145f8bd13f3c230da5e3af29225b4a2f7"},{"url":"https://git.kernel.org/stable/c/40f67686a5002c0c322fac918406bbc8d9c2ec2f"},{"url":"https://git.kernel.org/stable/c/58677783c89681871077f50a7042b0c6380c4fd8"},{"url":"https://git.kernel.org/stable/c/2fa119c0e5e528453ebae9e70740e8d2d8c0ed5a"}],"title":"Revert \"PCI/IOV: Add PCI rescan-remove locking when enabling/disabling SR-IOV\"","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-43147","datePublished":"2026-05-06T11:27:30.235Z","dateReserved":"2026-05-01T14:12:55.989Z","dateUpdated":"2026-05-11T22:18:40.286Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-05-06 12:16:32","lastModifiedDate":"2026-05-13 20:18:47","problem_types":["CWE-667"],"metrics":{"cvssMetricV31":[{"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:N/I:N/A:H","baseScore":5.5,"baseSeverity":"MEDIUM","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"},"exploitabilityScore":1.8,"impactScore":3.6}]},"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.4.301","versionEndExcluding":"5.5","matchCriteriaId":"ABCD8233-CFD6-4194-AA34-BD9E287307E3"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.10.246","versionEndExcluding":"5.10.252","matchCriteriaId":"4A9DDA2A-4C5B-4449-8771-770D86CF7DDE"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.15.195","versionEndExcluding":"5.15.202","matchCriteriaId":"B24EB1FA-19B2-49D7-A69B-15888BE06274"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.1.157","versionEndExcluding":"6.1.165","matchCriteriaId":"A1C6F3EA-9480-4F54-AA05-D52B53EC80F6"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.6.113","versionEndExcluding":"6.6.128","matchCriteriaId":"C5E8E922-3FF0-431A-8702-035D4539BF13"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.12.54","versionEndExcluding":"6.12.75","matchCriteriaId":"FC78A661-1343-4AFE-A84D-E36586DC36A9"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.17.4","versionEndExcluding":"6.18.16","matchCriteriaId":"91D00E25-4134-4FD2-A41C-44EA3CF9D3EE"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.19","versionEndExcluding":"6.19.6","matchCriteriaId":"373EEEDA-FAA1-4FB4-B6ED-DB4DD99DBE67"}]}]}]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"43147","Ordinal":"1","Title":"Revert \"PCI/IOV: Add PCI rescan-remove locking when enabling/dis","CVE":"CVE-2026-43147","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"43147","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nRevert \"PCI/IOV: Add PCI rescan-remove locking when enabling/disabling SR-IOV\"\n\nThis reverts commit 05703271c3cd (\"PCI/IOV: Add PCI rescan-remove locking\nwhen enabling/disabling SR-IOV\"), which causes a deadlock by recursively\ntaking pci_rescan_remove_lock when sriov_del_vfs() is called as part of\npci_stop_and_remove_bus_device(). For example with the following sequence\nof commands:\n\n  $ echo <NUM> > /sys/bus/pci/devices/<pf>/sriov_numvfs\n  $ echo 1 > /sys/bus/pci/devices/<pf>/remove\n\nA trimmed trace of the deadlock on a mlx5 device is as below:\n\n  zsh/5715 is trying to acquire lock:\n  000002597926ef50 (pci_rescan_remove_lock){+.+.}-{3:3}, at: sriov_disable+0x34/0x140\n\n  but task is already holding lock:\n  000002597926ef50 (pci_rescan_remove_lock){+.+.}-{3:3}, at: pci_stop_and_remove_bus_device_locked+0x24/0x80\n  ...\n  Call Trace:\n   [<00000259778c4f90>] dump_stack_lvl+0xc0/0x110\n   [<00000259779c844e>] print_deadlock_bug+0x31e/0x330\n   [<00000259779c1908>] __lock_acquire+0x16c8/0x32f0\n   [<00000259779bffac>] lock_acquire+0x14c/0x350\n   [<00000259789643a6>] __mutex_lock_common+0xe6/0x1520\n   [<000002597896413c>] mutex_lock_nested+0x3c/0x50\n   [<00000259784a07e4>] sriov_disable+0x34/0x140\n   [<00000258f7d6dd80>] mlx5_sriov_disable+0x50/0x80 [mlx5_core]\n   [<00000258f7d5745e>] remove_one+0x5e/0xf0 [mlx5_core]\n   [<00000259784857fc>] pci_device_remove+0x3c/0xa0\n   [<000002597851012e>] device_release_driver_internal+0x18e/0x280\n   [<000002597847ae22>] pci_stop_bus_device+0x82/0xa0\n   [<000002597847afce>] pci_stop_and_remove_bus_device_locked+0x5e/0x80\n   [<00000259784972c2>] remove_store+0x72/0x90\n   [<0000025977e6661a>] kernfs_fop_write_iter+0x15a/0x200\n   [<0000025977d7241c>] vfs_write+0x24c/0x300\n   [<0000025977d72696>] ksys_write+0x86/0x110\n   [<000002597895b61c>] __do_syscall+0x14c/0x400\n   [<000002597896e0ee>] system_call+0x6e/0x90\n\nThis alone is not a complete fix as it restores the issue the cited commit\ntried to solve. A new fix will be provided as a follow on.","Type":"Description","Title":"Revert \"PCI/IOV: Add PCI rescan-remove locking when enabling/dis"}]}}}