CVE-2026-43097

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-43097", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-05-01T14:12:55.984Z", "datePublished": "2026-05-06T07:40:28.157Z", "dateUpdated": "2026-05-11T22:17:40.279Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-11T22:17:40.279Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nPCI: hv: Fix double ida_free in hv_pci_probe error path\n\nIf hv_pci_probe() fails after storing the domain number in\nhbus->bridge->domain_nr, there is a call to free this domain_nr via\npci_bus_release_emul_domain_nr(), however, during cleanup, the bridge\nrelease callback pci_release_host_bridge_dev() also frees the domain_nr\ncausing ida_free to be called on same ID twice and triggering following\nwarning:\n\n ida_free called for id=28971 which is not allocated.\n WARNING: lib/idr.c:594 at ida_free+0xdf/0x160, CPU#0: kworker/0:2/198\n Call Trace:\n pci_bus_release_emul_domain_nr+0x17/0x20\n pci_release_host_bridge_dev+0x4b/0x60\n device_release+0x3b/0xa0\n kobject_put+0x8e/0x220\n devm_pci_alloc_host_bridge_release+0xe/0x20\n devres_release_all+0x9a/0xd0\n device_unbind_cleanup+0x12/0xa0\n really_probe+0x1c5/0x3f0\n vmbus_add_channel_work+0x135/0x1a0\n\nFix this by letting pci core handle the free domain_nr and remove\nthe explicit free called in pci-hyperv driver."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/pci/controller/pci-hyperv.c"], "versions": [{"version": "bcce8c74f1ce1e2731ac0261287897e3768767d8", "lessThan": "21bc8e0ba5c2a081b0a2808c976d4c9dbddf1e48", "status": "affected", "versionType": "git"}, {"version": "bcce8c74f1ce1e2731ac0261287897e3768767d8", "lessThan": "b6422dff0e518245019233432b6bccfc30b73e2f", "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/pci/controller/pci-hyperv.c"], "versions": [{"version": "6.19", "status": "affected"}, {"version": "0", "lessThan": "6.19", "status": "unaffected", "versionType": "semver"}, {"version": "6.19.14", "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": "6.19", "versionEndExcluding": "6.19.14"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.19", "versionEndExcluding": "7.0"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/21bc8e0ba5c2a081b0a2808c976d4c9dbddf1e48"}, {"url": "https://git.kernel.org/stable/c/b6422dff0e518245019233432b6bccfc30b73e2f"}], "title": "PCI: hv: Fix double ida_free in hv_pci_probe error path", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/pci/controller/pci-hyperv.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "21bc8e0ba5c2a081b0a2808c976d4c9dbddf1e48", "status": "affected", "version": "bcce8c74f1ce1e2731ac0261287897e3768767d8", "versionType": "git"}, {"lessThan": "b6422dff0e518245019233432b6bccfc30b73e2f", "status": "affected", "version": "bcce8c74f1ce1e2731ac0261287897e3768767d8", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/pci/controller/pci-hyperv.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.19"}, {"lessThan": "6.19", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.19.*", "status": "unaffected", "version": "6.19.14", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.0", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "D6A8A074-BBF4-4803-ABED-519A839435BB", "versionEndExcluding": "6.19.14", "versionStartIncluding": "6.19", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:*", "matchCriteriaId": "F253B622-8837-4245-BCE5-A7BF8FC76A16", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:*", "matchCriteriaId": "4AE85AD8-4641-4E7C-A2F4-305E2CD9EE64", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc3:*:*:*:*:*:*", "matchCriteriaId": "F666C8D8-6538-46D4-B318-87610DE64C34", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc4:*:*:*:*:*:*", "matchCriteriaId": "02259FDA-961B-47BC-AE7F-93D7EC6E90C2", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc5:*:*:*:*:*:*", "matchCriteriaId": "58A9FEFF-C040-420D-8F0A-BFDAAA1DF258", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc6:*:*:*:*:*:*", "matchCriteriaId": "1D2315C0-D46F-4F85-9754-F9E5E11374A6", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc7:*:*:*:*:*:*", "matchCriteriaId": "512EE3A8-A590-4501-9A94-5D4B268D6138", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nPCI: hv: Fix double ida_free in hv_pci_probe error path\n\nIf hv_pci_probe() fails after storing the domain number in\nhbus->bridge->domain_nr, there is a call to free this domain_nr via\npci_bus_release_emul_domain_nr(), however, during cleanup, the bridge\nrelease callback pci_release_host_bridge_dev() also frees the domain_nr\ncausing ida_free to be called on same ID twice and triggering following\nwarning:\n\n ida_free called for id=28971 which is not allocated.\n WARNING: lib/idr.c:594 at ida_free+0xdf/0x160, CPU#0: kworker/0:2/198\n Call Trace:\n pci_bus_release_emul_domain_nr+0x17/0x20\n pci_release_host_bridge_dev+0x4b/0x60\n device_release+0x3b/0xa0\n kobject_put+0x8e/0x220\n devm_pci_alloc_host_bridge_release+0xe/0x20\n devres_release_all+0x9a/0xd0\n device_unbind_cleanup+0x12/0xa0\n really_probe+0x1c5/0x3f0\n vmbus_add_channel_work+0x135/0x1a0\n\nFix this by letting pci core handle the free domain_nr and remove\nthe explicit free called in pci-hyperv driver."}, {"lang": "es", "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nPCI: hv: Corrige doble ida_free en la ruta de error de hv_pci_probe\n\nSi hv_pci_probe() falla despu\u00e9s de almacenar el n\u00famero de dominio en hbus -> bridge -> domain_nr, hay una llamada para liberar este domain_nr a trav\u00e9s de pci_bus_release_emul_domain_nr(), sin embargo, durante la limpieza, la devoluci\u00f3n de llamada de liberaci\u00f3n del puente pci_release_host_bridge_dev() tambi\u00e9n libera el domain_nr causando que ida_free sea llamado en el mismo ID dos veces y activando la siguiente advertencia:\n\n ida_free called for id=28971 which is not allocated.\n WARNING: lib/idr.c:594 at ida_free+0xdf/0x160, CPU#0: kworker/0:2/198\n Call Trace:\n pci_bus_release_emul_domain_nr+0x17/0x20\n pci_release_host_bridge_dev+0x4b/0x60\n device_release+0x3b/0xa0\n kobject_put+0x8e/0x220\n devm_pci_alloc_host_bridge_release+0xe/0x20\n devres_release_all+0x9a/0xd0\n device_unbind_cleanup+0x12/0xa0\n really_probe+0x1c5/0x3f0\n vmbus_add_channel_work+0x135/0x1a0\n\nSoluciona esto dejando que el n\u00facleo PCI maneje la liberaci\u00f3n de domain_nr y eliminando la liberaci\u00f3n expl\u00edcita llamada en el controlador pci-hyperv."}], "id": "CVE-2026-43097", "lastModified": "2026-11-11T21:10:00.200", "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": "nvd@nist.gov", "type": "Primary"}]}, "published": "2026-05-06T10:16:23.137", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/21bc8e0ba5c2a081b0a2808c976d4c9dbddf1e48"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/b6422dff0e518245019233432b6bccfc30b73e2f"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-415"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: PCI: hv: Fix double ida_free in hv_pci_probe error path", "id": "2466985", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2466985"}, "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-1341", "details": ["A flaw was found in the Linux kernel's PCI Hyper-V driver. During error handling, a specific resource identifier can be inadvertently freed twice. This double free vulnerability can lead to memory corruption, potentially causing system instability and a Denial of Service (DoS)."], "name": "CVE-2026-43097", "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": "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": "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": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-05-06T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-43097\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-43097\nhttps://lore.kernel.org/linux-cve-announce/2026050620-CVE-2026-43097-5b0d@gregkh/T"], "threat_severity": "Low"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[bcce8c74f1ce1e2731ac0261287897e3768767d8,21bc8e0ba5c2a081b0a2808c976d4c9dbddf1e48)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[bcce8c74f1ce1e2731ac0261287897e3768767d8,b6422dff0e518245019233432b6bccfc30b73e2f)"}}], "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": "6.19"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,6.19)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.19.14,6.20.0)"}}, {"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": "2026-05-06T12:15:03.443358+00:00", "updated": "2026-05-14T20:45:29.002618+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}