CVE-2026-68139

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-68139", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-07-30T09:28:09.370Z", "datePublished": "2026-08-10T11:59:02.768Z", "dateUpdated": "2026-11-06T16:44:59.480Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-17T04:59:32.634Z"}, "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."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/net/ethernet/mellanox/mlx5/core/en_main.c"], "versions": [{"version": "bf11485f8419f90ffaa3804fd01d8468fcc56e23", "lessThan": "c698b2735613f1f35c55688bd2252f75f31c49ad", "status": "affected", "versionType": "git"}, {"version": "bf11485f8419f90ffaa3804fd01d8468fcc56e23", "lessThan": "40f9a124ebbe0d60fe165fb3f87515c35b2d72f5", "status": "affected", "versionType": "git"}, {"version": "bf11485f8419f90ffaa3804fd01d8468fcc56e23", "lessThan": "a60c81f168c9fe4f5d84302d1e32b717f5a8a933", "status": "affected", "versionType": "git"}, {"version": "bf11485f8419f90ffaa3804fd01d8468fcc56e23", "lessThan": "e32649b4bad90a6216d8e93cd7dd050af8ac9740", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/net/ethernet/mellanox/mlx5/core/en_main.c"], "versions": [{"version": "6.7", "status": "affected"}, {"version": "0", "lessThan": "6.7", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.101", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.42", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1.6", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.7", "versionEndExcluding": "6.12.101"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.7", "versionEndExcluding": "6.18.42"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.7", "versionEndExcluding": "7.1.6"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.7", "versionEndExcluding": "7.2"}]}]}], "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"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-68139", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-11-06T16:43:05.137760Z"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-11-06T16:44:59.480Z"}}]}}

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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."}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.12.101", "versionStartIncluding": "6.7"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.18.42", "versionStartIncluding": "6.7"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "7.1.6", "versionStartIncluding": "6.7"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "7.2", "versionStartIncluding": "6.7"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-17T04:59:32.634Z"}}}, "cveMetadata": {"cveId": "CVE-2026-68139", "state": "PUBLISHED", "dateUpdated": "2026-11-06T16:44:59.480Z", "dateReserved": "2026-07-30T09:28:09.370Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2026-08-10T11:59:02.768Z", "assignerShortName": "Linux"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"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", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "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."}], "id": "CVE-2026-68139", "lastModified": "2026-11-06T17:19:18.597", "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-68139", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-11-06T16:43:05.137760Z", "version": "2.0.3"}}]}, "published": "2026-08-10T13:19:59.523", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/40f9a124ebbe0d60fe165fb3f87515c35b2d72f5"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/a60c81f168c9fe4f5d84302d1e32b717f5a8a933"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/c698b2735613f1f35c55688bd2252f75f31c49ad"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/e32649b4bad90a6216d8e93cd7dd050af8ac9740"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: net/mlx5e: Use sender devcom for MPV master-up", "id": "2513464", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2513464"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-476", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nnet/mlx5e: Use sender devcom for MPV master-up\nAfter PCIe DPC recovery, mlx5 reloads the affected functions and\nreplays multiport affiliation events. In the reported failure, the\nfirst relevant device error was:\npcieport 0000:10:01.1: DPC: containment event\npcieport 0000:10:01.1: PCIe Bus Error: severity=Uncorrected (Fatal)\npcieport 0000:10:01.1: [ 5] SDES (First)\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:\nBUG: kernel NULL pointer dereference, address: 0000000000000010\nRIP: mlx5_devcom_comp_set_ready+0x5/0x40 [mlx5_core]\nRDI: 0000000000000000\nCall trace included:\nmlx5_devcom_comp_set_ready\nmlx5e_devcom_event_mpv\nmlx5_devcom_send_event\nmlx5_ib_bind_slave_port\nmlx5r_mp_probe\nmlx5_pci_resume\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.\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.\nThis preserves the readiness transition while avoiding a NULL\ndereference of the peer devcom pointer during affiliation replay after\nPCI error recovery.", "A flaw was found in the net/mlx5e driver within the Linux kernel. This vulnerability occurs during PCIe DPC (Downstream Port Containment) recovery when multiport affiliation events are replayed. A race condition can lead to a NULL pointer dereference if a concurrent master-up event accesses uninitialized private data. Successful exploitation of this flaw can cause a kernel panic, resulting in a Denial of Service (DoS) for the affected system."], "name": "CVE-2026-68139", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-08-10T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-68139\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-68139\nhttps://lore.kernel.org/linux-cve-announce/2026081059-CVE-2026-68139-276e@gregkh/T"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[bf11485f8419f90ffaa3804fd01d8468fcc56e23,c698b2735613f1f35c55688bd2252f75f31c49ad)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[bf11485f8419f90ffaa3804fd01d8468fcc56e23,40f9a124ebbe0d60fe165fb3f87515c35b2d72f5)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[bf11485f8419f90ffaa3804fd01d8468fcc56e23,a60c81f168c9fe4f5d84302d1e32b717f5a8a933)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[bf11485f8419f90ffaa3804fd01d8468fcc56e23,e32649b4bad90a6216d8e93cd7dd050af8ac9740)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "6.7"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,6.7)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.101,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.42,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.1.6,7.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.2-rc5,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-08-10T15:45:03.478898+00:00", "updated": "2026-08-13T07:30:06.742632+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-476"]}