CVE-2026-31455

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This is broken\nindependently of any use-after-free issues - background reclaim and\ninodegc should not be running while the AIL is being pushed during\nunmount, as inodegc can dirty and insert inodes into the AIL during the\nflush, and background reclaim can race to abort and free dirty inodes.\n\nReorder xfs_unmount_flush_inodes() to stop inodegc and cancel background\nreclaim before pushing the AIL. Stop inodegc before cancelling\nm_reclaim_work because the inodegc worker can re-queue m_reclaim_work\nvia xfs_inodegc_set_reclaimable."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/xfs/xfs_mount.c"], "versions": [{"version": "90c60e16401248a4900f3f9387f563d0178dcf34", "lessThan": "e6cc490048f78b009259a5f032acead9f789c34c", "status": "affected", "versionType": "git"}, {"version": "90c60e16401248a4900f3f9387f563d0178dcf34", "lessThan": "239d734c00644072862fa833805c4471573b1445", "status": "affected", "versionType": "git"}, {"version": "90c60e16401248a4900f3f9387f563d0178dcf34", "lessThan": "bda27fc0b4eb3a425d9a18475c4cb94fbe862c60", "status": "affected", "versionType": "git"}, {"version": "90c60e16401248a4900f3f9387f563d0178dcf34", "lessThan": "d38135af04a3ad8a585c899d176efc8e97853115", "status": "affected", "versionType": "git"}, {"version": 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"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\nxfs: stop reclaim before pushing AIL during unmount\n\nThe unmount sequence in xfs_unmount_flush_inodes() pushed the AIL while\nbackground reclaim and inodegc are still running. This is broken\nindependently of any use-after-free issues - background reclaim and\ninodegc should not be running while the AIL is being pushed during\nunmount, as inodegc can dirty and insert inodes into the AIL during the\nflush, and background reclaim can race to abort and free dirty inodes.\n\nReorder xfs_unmount_flush_inodes() to stop inodegc and cancel background\nreclaim before pushing the AIL. Stop inodegc before cancelling\nm_reclaim_work because the inodegc worker can re-queue m_reclaim_work\nvia xfs_inodegc_set_reclaimable."}, {"lang": "es", "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nxfs: detener la recuperaci\u00f3n antes de empujar el AIL durante el desmontaje\n\nLa secuencia de desmontaje en xfs_unmount_flush_inodes() empujaba el AIL mientras la recuperaci\u00f3n en segundo plano y inodegc todav\u00eda est\u00e1n en ejecuci\u00f3n. Esto est\u00e1 roto independientemente de cualquier problema de uso despu\u00e9s de liberaci\u00f3n - la recuperaci\u00f3n en segundo plano y inodegc no deber\u00edan estar en ejecuci\u00f3n mientras el AIL est\u00e1 siendo empujado durante el desmontaje, ya que inodegc puede ensuciar e insertar inodos en el AIL durante la descarga, y la recuperaci\u00f3n en segundo plano puede competir para abortar y liberar inodos sucios.\n\nReordenar xfs_unmount_flush_inodes() para detener inodegc y cancelar la recuperaci\u00f3n en segundo plano antes de empujar el AIL. Detener inodegc antes de cancelar m_reclaim_work porque el trabajador de inodegc puede volver a encolar m_reclaim_work a trav\u00e9s de xfs_inodegc_set_reclaimable."}], "id": "CVE-2026-31455", "lastModified": "2026-11-11T23:10:00.263", "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"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-31455", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-11-05T21:33:58.259693Z", "version": "2.0.3"}}]}, "published": "2026-04-22T14:16:40.013", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/239d734c00644072862fa833805c4471573b1445"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/4f24a767e3d64a5f58c595b5c29b6063a201f1e3"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/558e3275d8a3b101be18a7fe7d1634053e9d9b07"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/8147e304d7d32fd5c3e943babc296ce2873dc279"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/a89434a6188d8430ea31120da96e3e4cefb58686"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/bda27fc0b4eb3a425d9a18475c4cb94fbe862c60"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/d38135af04a3ad8a585c899d176efc8e97853115"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/e6cc490048f78b009259a5f032acead9f789c34c"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-416"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: xfs: stop reclaim before pushing AIL during unmount", "id": "2460673", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2460673"}, "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-366", "details": ["A flaw was found in the Linux kernel's XFS file system. During the unmount process, the system attempts to flush data while background cleanup and inode garbage collection (inodegc) operations are still active. This improper synchronization can lead to data integrity issues or system instability, as critical file system operations may conflict."], "name": "CVE-2026-31455", "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": "Out of support scope", "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": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-04-22T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-31455\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-31455\nhttps://lore.kernel.org/linux-cve-announce/2026042249-CVE-2026-31455-1c26@gregkh/T"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[90c60e16401248a4900f3f9387f563d0178dcf34,e6cc490048f78b009259a5f032acead9f789c34c)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[90c60e16401248a4900f3f9387f563d0178dcf34,239d734c00644072862fa833805c4471573b1445)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[90c60e16401248a4900f3f9387f563d0178dcf34,bda27fc0b4eb3a425d9a18475c4cb94fbe862c60)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[90c60e16401248a4900f3f9387f563d0178dcf34,d38135af04a3ad8a585c899d176efc8e97853115)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[90c60e16401248a4900f3f9387f563d0178dcf34,a89434a6188d8430ea31120da96e3e4cefb58686)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[90c60e16401248a4900f3f9387f563d0178dcf34,8147e304d7d32fd5c3e943babc296ce2873dc279)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[90c60e16401248a4900f3f9387f563d0178dcf34,558e3275d8a3b101be18a7fe7d1634053e9d9b07)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[90c60e16401248a4900f3f9387f563d0178dcf34,4f24a767e3d64a5f58c595b5c29b6063a201f1e3)"}}], "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": "5.9"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,5.9)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[5.10.253,5.11.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[5.15.203,5.16.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.1.168,6.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.131,6.7.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.80,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.21,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.19.11,6.20.0)"}}, {"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": "2026-04-22T16:45:21.252558+00:00", "updated": "2026-05-05T22:30:33.623499+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}