CVE-2026-43117

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Local fsync paths also reach it, but the network file-server path is the highest reasonable vector.\nAC:L - Once the btrfs_sync_file tracepoint/perf event is active, triggering the bug is a deterministic fsync/flush on an overlay-backed btrfs file with no race or timing requirement. Overlay-on-btrfs is a normal supported configuration.\nPR:N - A remote client can plausibly reach the fsync path through a guest or writable NFS/SMB export without privileges on the vulnerable host. When uncertain, the higher severity no-privilege scenario is defensible.\nUI:N - No victim action is needed after the filesystem/export/tracing environment exists; the attacker only sends or performs the fsync/flush operation. Mounting or tracing setup is environmental, not per-exploit user interaction.\nS:U - The impact is within the same kernel security authority and does not cross a hypervisor, IOMMU, or sandbox boundary. Standard kernel crash or kernel-memory exposure remains scope unchanged.\nC:H - The bug type-confuses an overlay superblock as btrfs_fs_info and copies through the bogus fs_devices pointer into trace/perf data. If the pointer resolves to valid kernel memory, this can expose kernel memory, so the higher severity confidentiality impact is selected.\nI:N - The vulnerable operations are invalid reads and writes only to the trace record buffer, not attacker-controlled writes to kernel objects. No direct integrity modification or control-flow overwrite was found.\nA:H - The fix commit explicitly states the bad fsid assignment can crash, and the invalid superblock/fs_devices dereference can oops or panic the kernel. 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Local fsync paths also reach it, but the network file-server path is the highest reasonable vector.\nAC:L - Once the btrfs_sync_file tracepoint/perf event is active, triggering the bug is a deterministic fsync/flush on an overlay-backed btrfs file with no race or timing requirement. Overlay-on-btrfs is a normal supported configuration.\nPR:N - A remote client can plausibly reach the fsync path through a guest or writable NFS/SMB export without privileges on the vulnerable host. When uncertain, the higher severity no-privilege scenario is defensible.\nUI:N - No victim action is needed after the filesystem/export/tracing environment exists; the attacker only sends or performs the fsync/flush operation. Mounting or tracing setup is environmental, not per-exploit user interaction.\nS:U - The impact is within the same kernel security authority and does not cross a hypervisor, IOMMU, or sandbox boundary. Standard kernel crash or kernel-memory exposure remains scope unchanged.\nC:H - The bug type-confuses an overlay superblock as btrfs_fs_info and copies through the bogus fs_devices pointer into trace/perf data. If the pointer resolves to valid kernel memory, this can expose kernel memory, so the higher severity confidentiality impact is selected.\nI:N - The vulnerable operations are invalid reads and writes only to the trace record buffer, not attacker-controlled writes to kernel objects. No direct integrity modification or control-flow overwrite was found.\nA:H - The fix commit explicitly states the bad fsid assignment can crash, and the invalid superblock/fs_devices dereference can oops or panic the kernel. 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"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "130C6A37-2766-49E1-848F-2410950B4262", "versionEndExcluding": "6.6.136", "versionStartIncluding": "4.8", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "7F0AE5B5-23AC-4DCC-B37A-51CA1DAE7BA8", "versionEndExcluding": "6.12.83", "versionStartIncluding": "6.7", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "8126B8B8-6D0B-4443-86C1-672AEE893555", "versionEndExcluding": "6.18.24", "versionStartIncluding": "6.13", "vulnerable": true}, {"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}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: tracepoints: get correct superblock from dentry in event btrfs_sync_file()\n\nIf overlay is used on top of btrfs, dentry->d_sb translates to overlay's\nsuper block and fsid assignment will lead to a crash.\n\nUse file_inode(file)->i_sb to always get btrfs_sb."}, {"lang": "es", "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nbtrfs: tracepoints: obtener el superbloque correcto de dentry en el evento btrfs_sync_file()\n\nSi se usa overlay sobre btrfs, dentry -> d_sb se traduce al superbloque de overlay y la asignaci\u00f3n de fsid provocar\u00e1 un fallo.\n\nUsar file_inode(file) -> i_sb para obtener siempre btrfs_sb."}], "id": "CVE-2026-43117", "lastModified": "2026-11-11T21:10:00.200", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 9.1, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 5.2, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-43117", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-10-16T15:14:49.924916Z", "version": "2.0.3"}}]}, "published": "2026-05-06T10:16:25.513", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/2e4adfaec97ee053ad1bdfb5036845e66f7e0d8a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/32372781d664a9b03c40343e96c29d0a6139f97d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/4a7bab35fad5251c8cb738161152578cd83b6b9c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/520e8b4bcf872a534a7bf61ccf880047642df296"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/a85b46db143fda5869e7d8df8f258ccef5fa1719"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/c09a7446aab5773f38d6abb25fce99b8e1dfbc97"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/d110d7cdb045715c0b45b0dfd974525bb38f653d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/e252db8ca2a01f82d472091f35d549b313278636"}, {"source": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e", "url": "https://cert-portal.siemens.com/productcert/html/ssa-784472.html"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "NVD-CWE-noinfo"}], "source": "nvd@nist.gov", "type": "Primary"}, {"description": [{"lang": "en", "value": "CWE-476"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

{"bugzilla": {"description": "kernel: btrfs: tracepoints: get correct superblock from dentry in event btrfs_sync_file()", "id": "2467002", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2467002"}, "csaw": false, "details": ["No description is available for this CVE."], "name": "CVE-2026-43117", "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": "2026-05-06T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-43117\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-43117\nhttps://lore.kernel.org/linux-cve-announce/2026050627-CVE-2026-43117-8e20@gregkh/T"]}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,c09a7446aab5773f38d6abb25fce99b8e1dfbc97)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,32372781d664a9b03c40343e96c29d0a6139f97d)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,2e4adfaec97ee053ad1bdfb5036845e66f7e0d8a)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,d110d7cdb045715c0b45b0dfd974525bb38f653d)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,a85b46db143fda5869e7d8df8f258ccef5fa1719)"}}], "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": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.136,6.7.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.83,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.24,6.19.0)"}}, {"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": "2026-05-06T12:15:03.928529+00:00", "updated": "2026-10-23T07:45:17.033868+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}