{"api_version":"1","generated_at":"2026-08-13T22:37:54+00:00","cve":"CVE-2026-68139","urls":{"html":"https://cve.report/CVE-2026-68139","api":"https://cve.report/api/cve/CVE-2026-68139.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-68139","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-68139"},"summary":{"title":"net/mlx5e: Use sender devcom for MPV master-up","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet/mlx5e: Use sender devcom for MPV master-up\n\nAfter PCIe DPC recovery, mlx5 reloads the affected functions and\nreplays multiport affiliation events. In the reported failure, the\nfirst relevant device error was:\n\n  pcieport 0000:10:01.1: DPC: containment event\n  pcieport 0000:10:01.1: PCIe Bus Error: severity=Uncorrected (Fatal)\n  pcieport 0000:10:01.1:    [ 5] SDES                   (First)\n\nmlx5 recovered the PCI functions and resumed 0000:11:00.1. During\nthat resume, RDMA multiport binding replayed\nMLX5_DRIVER_EVENT_AFFILIATION_DONE and mlx5e sent\nMPV_DEVCOM_MASTER_UP. The host then panicked with:\n\n  BUG: kernel NULL pointer dereference, address: 0000000000000010\n  RIP: mlx5_devcom_comp_set_ready+0x5/0x40 [mlx5_core]\n  RDI: 0000000000000000\n\nCall trace included:\n\n  mlx5_devcom_comp_set_ready\n  mlx5e_devcom_event_mpv\n  mlx5_devcom_send_event\n  mlx5_ib_bind_slave_port\n  mlx5r_mp_probe\n  mlx5_pci_resume\n\nMPV devcom registration publishes mlx5e private data to the component\npeer list before mlx5e_devcom_init_mpv() stores the returned component\ndevice in priv->devcom. A concurrent master-up event can therefore\nreach a peer whose private data is visible but whose priv->devcom\nbackpointer is still NULL.\n\nMPV_DEVCOM_MASTER_UP already carries the sender/master mlx5e private\ndata as event_data. The ready bit is stored on the shared devcom\ncomponent, not on an individual peer. Use the sender devcom when\nmarking the MPV component ready.\n\nThis preserves the readiness transition while avoiding a NULL\ndereference of the peer devcom pointer during affiliation replay after\nPCI error recovery.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-08-10 13:19:59","updated_at":"2026-08-10 13:19:59"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/c698b2735613f1f35c55688bd2252f75f31c49ad","name":"https://git.kernel.org/stable/c/c698b2735613f1f35c55688bd2252f75f31c49ad","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/40f9a124ebbe0d60fe165fb3f87515c35b2d72f5","name":"https://git.kernel.org/stable/c/40f9a124ebbe0d60fe165fb3f87515c35b2d72f5","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/a60c81f168c9fe4f5d84302d1e32b717f5a8a933","name":"https://git.kernel.org/stable/c/a60c81f168c9fe4f5d84302d1e32b717f5a8a933","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/e32649b4bad90a6216d8e93cd7dd050af8ac9740","name":"https://git.kernel.org/stable/c/e32649b4bad90a6216d8e93cd7dd050af8ac9740","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-68139","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-68139","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected bf11485f8419f90ffaa3804fd01d8468fcc56e23 c698b2735613f1f35c55688bd2252f75f31c49ad git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected bf11485f8419f90ffaa3804fd01d8468fcc56e23 40f9a124ebbe0d60fe165fb3f87515c35b2d72f5 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected bf11485f8419f90ffaa3804fd01d8468fcc56e23 a60c81f168c9fe4f5d84302d1e32b717f5a8a933 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected bf11485f8419f90ffaa3804fd01d8468fcc56e23 e32649b4bad90a6216d8e93cd7dd050af8ac9740 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.7","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.7 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.101 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.42 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1.6 7.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2-rc5 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/net/ethernet/mellanox/mlx5/core/en_main.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"c698b2735613f1f35c55688bd2252f75f31c49ad","status":"affected","version":"bf11485f8419f90ffaa3804fd01d8468fcc56e23","versionType":"git"},{"lessThan":"40f9a124ebbe0d60fe165fb3f87515c35b2d72f5","status":"affected","version":"bf11485f8419f90ffaa3804fd01d8468fcc56e23","versionType":"git"},{"lessThan":"a60c81f168c9fe4f5d84302d1e32b717f5a8a933","status":"affected","version":"bf11485f8419f90ffaa3804fd01d8468fcc56e23","versionType":"git"},{"lessThan":"e32649b4bad90a6216d8e93cd7dd050af8ac9740","status":"affected","version":"bf11485f8419f90ffaa3804fd01d8468fcc56e23","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/net/ethernet/mellanox/mlx5/core/en_main.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.7"},{"lessThan":"6.7","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.101","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.42","versionType":"semver"},{"lessThanOrEqual":"7.1.*","status":"unaffected","version":"7.1.6","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.2-rc5","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.101","versionStartIncluding":"6.7","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.42","versionStartIncluding":"6.7","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1.6","versionStartIncluding":"6.7","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2-rc5","versionStartIncluding":"6.7","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet/mlx5e: Use sender devcom for MPV master-up\n\nAfter PCIe DPC recovery, mlx5 reloads the affected functions and\nreplays multiport affiliation events. In the reported failure, the\nfirst relevant device error was:\n\n  pcieport 0000:10:01.1: DPC: containment event\n  pcieport 0000:10:01.1: PCIe Bus Error: severity=Uncorrected (Fatal)\n  pcieport 0000:10:01.1:    [ 5] SDES                   (First)\n\nmlx5 recovered the PCI functions and resumed 0000:11:00.1. During\nthat resume, RDMA multiport binding replayed\nMLX5_DRIVER_EVENT_AFFILIATION_DONE and mlx5e sent\nMPV_DEVCOM_MASTER_UP. The host then panicked with:\n\n  BUG: kernel NULL pointer dereference, address: 0000000000000010\n  RIP: mlx5_devcom_comp_set_ready+0x5/0x40 [mlx5_core]\n  RDI: 0000000000000000\n\nCall trace included:\n\n  mlx5_devcom_comp_set_ready\n  mlx5e_devcom_event_mpv\n  mlx5_devcom_send_event\n  mlx5_ib_bind_slave_port\n  mlx5r_mp_probe\n  mlx5_pci_resume\n\nMPV devcom registration publishes mlx5e private data to the component\npeer list before mlx5e_devcom_init_mpv() stores the returned component\ndevice in priv->devcom. A concurrent master-up event can therefore\nreach a peer whose private data is visible but whose priv->devcom\nbackpointer is still NULL.\n\nMPV_DEVCOM_MASTER_UP already carries the sender/master mlx5e private\ndata as event_data. The ready bit is stored on the shared devcom\ncomponent, not on an individual peer. Use the sender devcom when\nmarking the MPV component ready.\n\nThis preserves the readiness transition while avoiding a NULL\ndereference of the peer devcom pointer during affiliation replay after\nPCI error recovery."}],"providerMetadata":{"dateUpdated":"2026-08-10T11:59:02.768Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/c698b2735613f1f35c55688bd2252f75f31c49ad"},{"url":"https://git.kernel.org/stable/c/40f9a124ebbe0d60fe165fb3f87515c35b2d72f5"},{"url":"https://git.kernel.org/stable/c/a60c81f168c9fe4f5d84302d1e32b717f5a8a933"},{"url":"https://git.kernel.org/stable/c/e32649b4bad90a6216d8e93cd7dd050af8ac9740"}],"title":"net/mlx5e: Use sender devcom for MPV master-up","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-68139","datePublished":"2026-08-10T11:59:02.768Z","dateReserved":"2026-07-30T09:28:09.370Z","dateUpdated":"2026-08-10T11:59:02.768Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-08-10 13:19:59","lastModifiedDate":"2026-08-10 13:19:59","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"68139","Ordinal":"1","Title":"net/mlx5e: Use sender devcom for MPV master-up","CVE":"CVE-2026-68139","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"68139","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet/mlx5e: Use sender devcom for MPV master-up\n\nAfter PCIe DPC recovery, mlx5 reloads the affected functions and\nreplays multiport affiliation events. In the reported failure, the\nfirst relevant device error was:\n\n  pcieport 0000:10:01.1: DPC: containment event\n  pcieport 0000:10:01.1: PCIe Bus Error: severity=Uncorrected (Fatal)\n  pcieport 0000:10:01.1:    [ 5] SDES                   (First)\n\nmlx5 recovered the PCI functions and resumed 0000:11:00.1. During\nthat resume, RDMA multiport binding replayed\nMLX5_DRIVER_EVENT_AFFILIATION_DONE and mlx5e sent\nMPV_DEVCOM_MASTER_UP. The host then panicked with:\n\n  BUG: kernel NULL pointer dereference, address: 0000000000000010\n  RIP: mlx5_devcom_comp_set_ready+0x5/0x40 [mlx5_core]\n  RDI: 0000000000000000\n\nCall trace included:\n\n  mlx5_devcom_comp_set_ready\n  mlx5e_devcom_event_mpv\n  mlx5_devcom_send_event\n  mlx5_ib_bind_slave_port\n  mlx5r_mp_probe\n  mlx5_pci_resume\n\nMPV devcom registration publishes mlx5e private data to the component\npeer list before mlx5e_devcom_init_mpv() stores the returned component\ndevice in priv->devcom. A concurrent master-up event can therefore\nreach a peer whose private data is visible but whose priv->devcom\nbackpointer is still NULL.\n\nMPV_DEVCOM_MASTER_UP already carries the sender/master mlx5e private\ndata as event_data. The ready bit is stored on the shared devcom\ncomponent, not on an individual peer. Use the sender devcom when\nmarking the MPV component ready.\n\nThis preserves the readiness transition while avoiding a NULL\ndereference of the peer devcom pointer during affiliation replay after\nPCI error recovery.","Type":"Description","Title":"net/mlx5e: Use sender devcom for MPV master-up"}]}}}