{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-43056", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-05-01T14:12:55.980Z", "datePublished": "2026-05-01T14:15:48.837Z", "dateUpdated": "2026-08-05T12:25:37.114Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T12:25:37.114Z" }, "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()." } ], "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" } } } }