CVE-2026-89455

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-89455", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-11T19:38:34.707Z", "datePublished": "2026-09-11T19:43:19.370Z", "dateUpdated": "2026-10-19T08:47:04.758Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T08:47:04.758Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nPCI: plda: Fix use-after-free of event IRQs during teardown\n\nplda_pcie_irq_domain_deinit() removes pcie->event_domain via\nirq_domain_remove(), but the per-event IRQs mapped from that domain\nare requested with devm_request_irq() in plda_init_interrupts(). The\nactual free_irq() for a devm-managed IRQ is deferred by devres until\nafter the calling probe()/remove() function returns.\n\nThis means irq_domain_remove() can free the domain's internal data\nbefore the deferred free_irq() for IRQs still mapped into it has run.\nWhen devres later processes that deferred cleanup, it can end up\ndereferencing the already-freed domain.\n\nFree each event IRQ explicitly with devm_free_irq() before removing\nthe domain. This triggers the free immediately and removes the IRQ\nfrom the devres tracking list, so devres will not attempt to free it\na second time later.\n\nAlso dispose of the event, INTx, and MSI IRQ mappings with\nirq_dispose_mapping() before their owning domains are removed.\n\nFinally, guard the calls to irq_set_chained_handler_and_data() for\npcie->irq, pcie->msi_irq, and pcie->intx_irq so they only run when\nthose fields hold a valid (>0) IRQ number.\n\nThis is a pre-existing issue, flagged by automated review during work\non an earlier, unrelated patch to this driver.\n\nBuild-tested and boot-tested on StarFive VisionFive v1.2A board"}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/pci/controller/plda/pcie-plda-host.c"], "versions": [{"version": "76c9113968079140cb2f885631db422170f32105", "lessThan": "1d0159e139261996a3ca21798d9114aab2124d3c", "status": "affected", "versionType": "git"}, {"version": "76c9113968079140cb2f885631db422170f32105", "lessThan": "01c2f0c66bd1f892db9c6e82976da6b463cc4427", "status": "affected", "versionType": "git"}, {"version": "76c9113968079140cb2f885631db422170f32105", "lessThan": "e3589ca5f2e6477774753a2202c21509428d4701", "status": "affected", "versionType": "git"}, {"version": "76c9113968079140cb2f885631db422170f32105", "lessThan": "26b73bae01d6eb81a4a38f36101812f20b2639de", "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/plda/pcie-plda-host.c"], "versions": [{"version": "6.11", "status": "affected"}, {"version": "0", "lessThan": "6.11", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.109", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.50", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.4", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.3", "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": "6.11", "versionEndExcluding": "6.12.109"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.11", "versionEndExcluding": "6.18.50"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.11", "versionEndExcluding": "7.2.4"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.11", "versionEndExcluding": "7.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/1d0159e139261996a3ca21798d9114aab2124d3c"}, {"url": "https://git.kernel.org/stable/c/01c2f0c66bd1f892db9c6e82976da6b463cc4427"}, {"url": "https://git.kernel.org/stable/c/e3589ca5f2e6477774753a2202c21509428d4701"}, {"url": "https://git.kernel.org/stable/c/26b73bae01d6eb81a4a38f36101812f20b2639de"}], "title": "PCI: plda: Fix use-after-free of event IRQs during teardown", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/pci/controller/plda/pcie-plda-host.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "1d0159e139261996a3ca21798d9114aab2124d3c", "status": "affected", "version": "76c9113968079140cb2f885631db422170f32105", "versionType": "git"}, {"lessThan": "01c2f0c66bd1f892db9c6e82976da6b463cc4427", "status": "affected", "version": "76c9113968079140cb2f885631db422170f32105", "versionType": "git"}, {"lessThan": "e3589ca5f2e6477774753a2202c21509428d4701", "status": "affected", "version": "76c9113968079140cb2f885631db422170f32105", "versionType": "git"}, {"lessThan": "26b73bae01d6eb81a4a38f36101812f20b2639de", "status": "affected", "version": "76c9113968079140cb2f885631db422170f32105", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/pci/controller/plda/pcie-plda-host.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.11"}, {"lessThan": "6.11", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.109", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.50", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.4", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.3", "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\nPCI: plda: Fix use-after-free of event IRQs during teardown\n\nplda_pcie_irq_domain_deinit() removes pcie->event_domain via\nirq_domain_remove(), but the per-event IRQs mapped from that domain\nare requested with devm_request_irq() in plda_init_interrupts(). The\nactual free_irq() for a devm-managed IRQ is deferred by devres until\nafter the calling probe()/remove() function returns.\n\nThis means irq_domain_remove() can free the domain's internal data\nbefore the deferred free_irq() for IRQs still mapped into it has run.\nWhen devres later processes that deferred cleanup, it can end up\ndereferencing the already-freed domain.\n\nFree each event IRQ explicitly with devm_free_irq() before removing\nthe domain. This triggers the free immediately and removes the IRQ\nfrom the devres tracking list, so devres will not attempt to free it\na second time later.\n\nAlso dispose of the event, INTx, and MSI IRQ mappings with\nirq_dispose_mapping() before their owning domains are removed.\n\nFinally, guard the calls to irq_set_chained_handler_and_data() for\npcie->irq, pcie->msi_irq, and pcie->intx_irq so they only run when\nthose fields hold a valid (>0) IRQ number.\n\nThis is a pre-existing issue, flagged by automated review during work\non an earlier, unrelated patch to this driver.\n\nBuild-tested and boot-tested on StarFive VisionFive v1.2A board"}], "id": "CVE-2026-89455", "lastModified": "2026-10-19T09:17:37.790", "metrics": {}, "published": "2026-09-11T20:19:26.220", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/01c2f0c66bd1f892db9c6e82976da6b463cc4427"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/1d0159e139261996a3ca21798d9114aab2124d3c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/26b73bae01d6eb81a4a38f36101812f20b2639de"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/e3589ca5f2e6477774753a2202c21509428d4701"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: Linux kernel PCI PLDA driver: Use-after-free vulnerability during IRQ teardown", "id": "2532263", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2532263"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.1", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-825", "details": ["A flaw was found in the Linux kernel's PCI PLDA driver. During the teardown of Interrupt Request (IRQ) domains, the system can attempt to access memory that has already been freed. This 'use-after-free' vulnerability occurs because the domain's internal data is released before all associated IRQs are properly deallocated. This can lead to system instability or crashes."], "name": "CVE-2026-89455", "public_date": "2026-09-11T19:43:19Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-89455\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-89455\nhttps://git.kernel.org/stable/c/01c2f0c66bd1f892db9c6e82976da6b463cc4427\nhttps://git.kernel.org/stable/c/1d0159e139261996a3ca21798d9114aab2124d3c\nhttps://git.kernel.org/stable/c/26b73bae01d6eb81a4a38f36101812f20b2639de\nhttps://git.kernel.org/stable/c/e3589ca5f2e6477774753a2202c21509428d4701"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[76c9113968079140cb2f885631db422170f32105,1d0159e139261996a3ca21798d9114aab2124d3c)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[76c9113968079140cb2f885631db422170f32105,01c2f0c66bd1f892db9c6e82976da6b463cc4427)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[76c9113968079140cb2f885631db422170f32105,e3589ca5f2e6477774753a2202c21509428d4701)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[76c9113968079140cb2f885631db422170f32105,26b73bae01d6eb81a4a38f36101812f20b2639de)"}}], "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": "[6.11,6.11]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,6.11)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.109,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.50,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.4,7.3.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[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": "2026-09-12T03:00:10.902646+00:00", "updated": "2026-09-21T01:30:08.753075+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}