CVE-2026-43056

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Since adev is embedded in\nstruct mana_adev, the subsequent fall-through to init_fail and access\nto adev->id may result in a use-after-free.\n\nFix this by saving the allocated auxiliary device id in a local\nvariable before calling auxiliary_device_add(), and use that saved id\nin the cleanup path after auxiliary_device_uninit()."}], "metrics": [{"cvssV3_1": {"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"}, "scenarios": [{"lang": "en", "value": "AV:L - The vulnerable `add_adev()` error path is reached during MANA PCI driver probe/resume/recovery or auxiliary RDMA service handling, not by processing received network packets. The highest defensible attacker path is local influence over driver/device lifecycle or resource-failure conditions.\nAC:L - Once `auxiliary_device_add()` fails, the UAF is deterministic because `auxiliary_device_uninit()` releases the embedded object and the cleanup path immediately reads `adev->id`. No attacker-uncontrolled race is required beyond reaching that failure path.\nPR:L - The path is not exposed to unauthenticated remote peers, but a local attacker can plausibly influence resource exhaustion/failure conditions around driver lifecycle events. Direct sysfs/module lifecycle control is privileged, but Low is the higher-severity defensible choice under the conservative scoring rule.\nUI:N - No separate victim action is required once the attacker can exercise or influence the local driver lifecycle/failure path. Probe, resume, and service-event handling run in kernel context.\nS:U - The affected component and impacts are within the Linux kernel security scope. This is not a VM escape, IOMMU bypass, or cross-authority boundary violation.\nC:H - This is a kernel use-after-free of an auxiliary-device container object after its release callback frees it. Under conservative kernel UAF scoring, freed slab reuse can support information disclosure, so confidentiality is High.\nI:H - The UAF lets stale object contents influence cleanup through `mana_adev_idx_free()`, and kernel UAFs are conservatively treated as potentially exploitable memory corruption. Integrity is therefore High.\nA:H - At minimum, the stale access can trigger a kernel UAF report, invalid IDA cleanup, oops, or panic during probe/resume error unwinding. Availability impact is High."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/net/ethernet/microsoft/mana/mana_en.c"], "versions": [{"version": "a69839d4327d053b18d8e1b0e7ddeee78db78f4f", "lessThan": "d88541ffd56d62a61e77209080001eddd4d69815", "status": "affected", "versionType": "git"}, {"version": "a69839d4327d053b18d8e1b0e7ddeee78db78f4f", "lessThan": "43f5b19fd190fea20d052bc84741b28031d5baa9", "status": "affected", "versionType": "git"}, {"version": "a69839d4327d053b18d8e1b0e7ddeee78db78f4f", "lessThan": "5f4061f8225d18695e5afe9bbf1cb7bd673d7872", "status": "affected", "versionType": "git"}, {"version": "a69839d4327d053b18d8e1b0e7ddeee78db78f4f", "lessThan": "e5a75bf026c686b91a7dc6f9c5caf5016745d1fe", "status": "affected", "versionType": "git"}, {"version": "a69839d4327d053b18d8e1b0e7ddeee78db78f4f", "lessThan": "c4ea7d8907cf72b259bf70bd8c2e791e1c4ff70f", "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/microsoft/mana/mana_en.c"], "versions": [{"version": "6.2", "status": "affected"}, {"version": "0", "lessThan": "6.2", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.134", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.81", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.22", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.19.12", "lessThanOrEqual": "6.19.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0", "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": "6.2", "versionEndExcluding": "6.6.134"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.2", "versionEndExcluding": "6.12.81"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.2", "versionEndExcluding": "6.18.22"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.2", "versionEndExcluding": "6.19.12"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.2", "versionEndExcluding": "7.0"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/d88541ffd56d62a61e77209080001eddd4d69815"}, {"url": "https://git.kernel.org/stable/c/43f5b19fd190fea20d052bc84741b28031d5baa9"}, {"url": "https://git.kernel.org/stable/c/5f4061f8225d18695e5afe9bbf1cb7bd673d7872"}, {"url": "https://git.kernel.org/stable/c/e5a75bf026c686b91a7dc6f9c5caf5016745d1fe"}, {"url": "https://git.kernel.org/stable/c/c4ea7d8907cf72b259bf70bd8c2e791e1c4ff70f"}], "title": "net: mana: fix use-after-free in add_adev() error path", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-43056", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2026-10-16T15:14:07.416746Z"}}}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-416", "description": "CWE-416 Use After Free"}]}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-19T19:06:11.769Z"}}]}}

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The highest defensible attacker path is local influence over driver/device lifecycle or resource-failure conditions.\nAC:L - Once `auxiliary_device_add()` fails, the UAF is deterministic because `auxiliary_device_uninit()` releases the embedded object and the cleanup path immediately reads `adev->id`. No attacker-uncontrolled race is required beyond reaching that failure path.\nPR:L - The path is not exposed to unauthenticated remote peers, but a local attacker can plausibly influence resource exhaustion/failure conditions around driver lifecycle events. Direct sysfs/module lifecycle control is privileged, but Low is the higher-severity defensible choice under the conservative scoring rule.\nUI:N - No separate victim action is required once the attacker can exercise or influence the local driver lifecycle/failure path. Probe, resume, and service-event handling run in kernel context.\nS:U - The affected component and impacts are within the Linux kernel security scope. This is not a VM escape, IOMMU bypass, or cross-authority boundary violation.\nC:H - This is a kernel use-after-free of an auxiliary-device container object after its release callback frees it. Under conservative kernel UAF scoring, freed slab reuse can support information disclosure, so confidentiality is High.\nI:H - The UAF lets stale object contents influence cleanup through `mana_adev_idx_free()`, and kernel UAFs are conservatively treated as potentially exploitable memory corruption. Integrity is therefore High.\nA:H - At minimum, the stale access can trigger a kernel UAF report, invalid IDA cleanup, oops, or panic during probe/resume error unwinding. Availability impact is High."}]}], "affected": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "a69839d4327d053b18d8e1b0e7ddeee78db78f4f", "lessThan": "d88541ffd56d62a61e77209080001eddd4d69815", "versionType": "git"}, {"status": "affected", "version": "a69839d4327d053b18d8e1b0e7ddeee78db78f4f", "lessThan": "43f5b19fd190fea20d052bc84741b28031d5baa9", "versionType": "git"}, {"status": "affected", "version": "a69839d4327d053b18d8e1b0e7ddeee78db78f4f", "lessThan": "5f4061f8225d18695e5afe9bbf1cb7bd673d7872", "versionType": "git"}, {"status": "affected", "version": "a69839d4327d053b18d8e1b0e7ddeee78db78f4f", "lessThan": "e5a75bf026c686b91a7dc6f9c5caf5016745d1fe", "versionType": "git"}, {"status": "affected", "version": "a69839d4327d053b18d8e1b0e7ddeee78db78f4f", "lessThan": "c4ea7d8907cf72b259bf70bd8c2e791e1c4ff70f", "versionType": "git"}], "programFiles": ["drivers/net/ethernet/microsoft/mana/mana_en.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "6.2"}, {"status": "unaffected", "version": "0", "lessThan": "6.2", "versionType": "semver"}, {"status": "unaffected", "version": "6.6.134", "versionType": "semver", "lessThanOrEqual": "6.6.*"}, {"status": "unaffected", "version": "6.12.81", "versionType": "semver", "lessThanOrEqual": "6.12.*"}, {"status": "unaffected", "version": "6.18.22", "versionType": "semver", "lessThanOrEqual": "6.18.*"}, {"status": "unaffected", "version": "6.19.12", "versionType": "semver", "lessThanOrEqual": "6.19.*"}, {"status": "unaffected", "version": "7.0", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["drivers/net/ethernet/microsoft/mana/mana_en.c"], "defaultStatus": "affected"}], "references": [{"url": "https://git.kernel.org/stable/c/d88541ffd56d62a61e77209080001eddd4d69815"}, {"url": "https://git.kernel.org/stable/c/43f5b19fd190fea20d052bc84741b28031d5baa9"}, {"url": "https://git.kernel.org/stable/c/5f4061f8225d18695e5afe9bbf1cb7bd673d7872"}, {"url": "https://git.kernel.org/stable/c/e5a75bf026c686b91a7dc6f9c5caf5016745d1fe"}, {"url": "https://git.kernel.org/stable/c/c4ea7d8907cf72b259bf70bd8c2e791e1c4ff70f"}], "x_generator": {"engine": "bippy-1.2.0"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: mana: fix use-after-free in add_adev() error path\n\nIf auxiliary_device_add() fails, add_adev() jumps to add_fail and calls\nauxiliary_device_uninit(adev).\n\nThe auxiliary device has its release callback set to adev_release(),\nwhich frees the containing struct mana_adev. Since adev is embedded in\nstruct mana_adev, the subsequent fall-through to init_fail and access\nto adev->id may result in a use-after-free.\n\nFix this by saving the allocated auxiliary device id in a local\nvariable before calling auxiliary_device_add(), and use that saved id\nin the cleanup path after auxiliary_device_uninit()."}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.6.134", "versionStartIncluding": "6.2"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.12.81", "versionStartIncluding": "6.2"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.18.22", "versionStartIncluding": "6.2"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.19.12", "versionStartIncluding": "6.2"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "7.0", "versionStartIncluding": "6.2"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T12:25:37.114Z"}}}, "cveMetadata": {"cveId": "CVE-2026-43056", "state": "PUBLISHED", "dateUpdated": "2026-10-19T19:06:11.769Z", "dateReserved": "2026-05-01T14:12:55.980Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2026-05-01T14:15:48.837Z", "assignerShortName": "Linux"}, "dataVersion": "5.2"}

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Since adev is embedded in\nstruct mana_adev, the subsequent fall-through to init_fail and access\nto adev->id may result in a use-after-free.\n\nFix this by saving the allocated auxiliary device id in a local\nvariable before calling auxiliary_device_add(), and use that saved id\nin the cleanup path after auxiliary_device_uninit()."}, {"lang": "es", "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nnet: mana: corregir uso despu\u00e9s de liberaci\u00f3n en la ruta de error de add_adev()\n\nSi auxiliary_device_add() falla, add_adev() salta a add_fail y llama a auxiliary_device_uninit(adev).\n\nEl dispositivo auxiliar tiene su callback de liberaci\u00f3n configurado en adev_release(), que libera la estructura contenedora mana_adev. Dado que adev est\u00e1 incrustado en la estructura mana_adev, la subsiguiente continuaci\u00f3n a init_fail y el acceso a adev -> id pueden resultar en un uso despu\u00e9s de liberaci\u00f3n.\n\nSolucione esto guardando el ID del dispositivo auxiliar asignado en una variable local antes de llamar a auxiliary_device_add(), y use ese ID guardado en la ruta de limpieza despu\u00e9s de auxiliary_device_uninit()."}], "id": "CVE-2026-43056", "lastModified": "2026-11-11T23:10:00.263", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-43056", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-10-16T15:14:07.416746Z", "version": "2.0.3"}}]}, "published": "2026-05-01T15:16:52.147", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/43f5b19fd190fea20d052bc84741b28031d5baa9"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/5f4061f8225d18695e5afe9bbf1cb7bd673d7872"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/c4ea7d8907cf72b259bf70bd8c2e791e1c4ff70f"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/d88541ffd56d62a61e77209080001eddd4d69815"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/e5a75bf026c686b91a7dc6f9c5caf5016745d1fe"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-416"}], "source": "nvd@nist.gov", "type": "Primary"}, {"description": [{"lang": "en", "value": "CWE-416"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

{"bugzilla": {"description": "kernel: net: mana: fix use-after-free in add_adev() error path", "id": "2464449", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2464449"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.0", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-825", "details": ["A flaw was found in the Linux kernel's mana network driver. An issue in the error handling of the `add_adev()` function can lead to a use-after-free vulnerability. This occurs when memory is released prematurely but then accessed again, which could allow a local attacker to cause a system crash (denial of service) or potentially gain elevated access (privilege escalation)."], "name": "CVE-2026-43056", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "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": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-05-01T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-43056\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-43056\nhttps://lore.kernel.org/linux-cve-announce/2026050108-CVE-2026-43056-fefd@gregkh/T"], "threat_severity": "Important"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[a69839d4327d053b18d8e1b0e7ddeee78db78f4f,d88541ffd56d62a61e77209080001eddd4d69815)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[a69839d4327d053b18d8e1b0e7ddeee78db78f4f,43f5b19fd190fea20d052bc84741b28031d5baa9)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[a69839d4327d053b18d8e1b0e7ddeee78db78f4f,5f4061f8225d18695e5afe9bbf1cb7bd673d7872)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[a69839d4327d053b18d8e1b0e7ddeee78db78f4f,e5a75bf026c686b91a7dc6f9c5caf5016745d1fe)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[a69839d4327d053b18d8e1b0e7ddeee78db78f4f,c4ea7d8907cf72b259bf70bd8c2e791e1c4ff70f)"}}], "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": "[6.2,6.2]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,6.2)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.134,6.7.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.81,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.22,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.19.12,6.20.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.0,*]"}}], "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": "2026-05-01T19:15:23.981469+00:00", "updated": "2026-05-07T21:15:11.023649+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}