CVE-2026-46009

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EPC device refcounting is tied to configfs EPC\ngroup lifetime, and pci_epc_put() in the .drop_link path is sufficient."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/pci/endpoint/functions/pci-epf-ntb.c"], "versions": [{"version": "8b821cf761503b80d0bd052f932adfe1bc1a0088", "lessThan": "c3029721b84f59e790285ad27544ed5d3cb0f2a6", "status": "affected", "versionType": "git"}, {"version": "8b821cf761503b80d0bd052f932adfe1bc1a0088", "lessThan": "c72f6a7ea638f95c486a5cfd86e567b646027687", "status": "affected", "versionType": "git"}, {"version": "8b821cf761503b80d0bd052f932adfe1bc1a0088", "lessThan": "72099f015d3c77bf2eb703d1aab113bd7a60915a", "status": "affected", "versionType": "git"}, {"version": "8b821cf761503b80d0bd052f932adfe1bc1a0088", "lessThan": "756ca5e7ed22d9045bb4de4c981f9149278d5cd3", "status": "affected", "versionType": "git"}, {"version": "8b821cf761503b80d0bd052f932adfe1bc1a0088", "lessThan": "65fc57c8b8f0b31be62be291cb1bb01755cec85d", "status": "affected", "versionType": "git"}, {"version": "8b821cf761503b80d0bd052f932adfe1bc1a0088", "lessThan": "e813c95e4c8edd31599081e6356e20ada30e266d", "status": "affected", "versionType": "git"}, {"version": "8b821cf761503b80d0bd052f932adfe1bc1a0088", "lessThan": "3446beddba450c8d6f9aca2f028712ac527fead3", "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/endpoint/functions/pci-epf-ntb.c"], "versions": [{"version": "5.12", "status": "affected"}, {"version": "0", "lessThan": "5.12", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.209", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.175", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.140", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.86", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.27", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0.4", "lessThanOrEqual": "7.0.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1", "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": "5.12", "versionEndExcluding": "5.15.209"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.12", "versionEndExcluding": "6.1.175"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.12", "versionEndExcluding": "6.6.140"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.12", "versionEndExcluding": "6.12.86"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.12", "versionEndExcluding": "6.18.27"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.12", "versionEndExcluding": "7.0.4"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.12", "versionEndExcluding": "7.1"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/c3029721b84f59e790285ad27544ed5d3cb0f2a6"}, {"url": "https://git.kernel.org/stable/c/c72f6a7ea638f95c486a5cfd86e567b646027687"}, {"url": "https://git.kernel.org/stable/c/72099f015d3c77bf2eb703d1aab113bd7a60915a"}, {"url": "https://git.kernel.org/stable/c/756ca5e7ed22d9045bb4de4c981f9149278d5cd3"}, {"url": "https://git.kernel.org/stable/c/65fc57c8b8f0b31be62be291cb1bb01755cec85d"}, {"url": "https://git.kernel.org/stable/c/e813c95e4c8edd31599081e6356e20ada30e266d"}, {"url": "https://git.kernel.org/stable/c/3446beddba450c8d6f9aca2f028712ac527fead3"}], "title": "PCI: endpoint: pci-epf-ntb: Remove duplicate resource teardown", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

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This leads to an oops when .allow_link fails or\nwhen .drop_link is performed. Remove the helper.\n\nAlso drop pci_epc_put(). EPC device refcounting is tied to configfs EPC\ngroup lifetime, and pci_epc_put() in the .drop_link path is sufficient."}], "id": "CVE-2026-46009", "lastModified": "2026-06-17T10:52:53.520", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2026-05-27T14:17:18.710", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/3446beddba450c8d6f9aca2f028712ac527fead3"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/65fc57c8b8f0b31be62be291cb1bb01755cec85d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/72099f015d3c77bf2eb703d1aab113bd7a60915a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/756ca5e7ed22d9045bb4de4c981f9149278d5cd3"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/c3029721b84f59e790285ad27544ed5d3cb0f2a6"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/c72f6a7ea638f95c486a5cfd86e567b646027687"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/e813c95e4c8edd31599081e6356e20ada30e266d"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "NVD-CWE-noinfo"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: PCI: endpoint: pci-epf-ntb: Remove duplicate resource teardown", "id": "2482159", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2482159"}, "csaw": false, "cwe": "CWE-832", "details": ["A flaw was found in the Linux kernel, specifically within the PCI endpoint NTB (Non-Transparent Bridge) module. A programming error involving a duplicate resource teardown in the epf_ntb_epc_destroy() function can lead to a kernel 'oops', which is a system crash. This issue can be triggered during PCI link operations, such as allow_link or drop_link, potentially resulting in a denial of service for the affected system."], "name": "CVE-2026-46009", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not 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": "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": "2026-05-27T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-46009\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-46009\nhttps://lore.kernel.org/linux-cve-announce/2026052744-CVE-2026-46009-9254@gregkh/T"]}

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