{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-31455", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-03-09T15:48:24.092Z", "datePublished": "2026-04-22T13:53:48.914Z", "dateUpdated": "2026-05-11T22:09:03.235Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-11T22:09:03.235Z"}, "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."}], "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": "90c60e16401248a4900f3f9387f563d0178dcf34", "lessThan": "a89434a6188d8430ea31120da96e3e4cefb58686", "status": "affected", "versionType": "git"}, {"version": "90c60e16401248a4900f3f9387f563d0178dcf34", "lessThan": "8147e304d7d32fd5c3e943babc296ce2873dc279", "status": "affected", "versionType": "git"}, {"version": "90c60e16401248a4900f3f9387f563d0178dcf34", "lessThan": "558e3275d8a3b101be18a7fe7d1634053e9d9b07", "status": "affected", "versionType": "git"}, {"version": "90c60e16401248a4900f3f9387f563d0178dcf34", "lessThan": "4f24a767e3d64a5f58c595b5c29b6063a201f1e3", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/xfs/xfs_mount.c"], "versions": [{"version": "5.9", "status": "affected"}, {"version": "0", "lessThan": "5.9", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.253", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.203", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.168", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.131", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.80", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.21", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.19.11", "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": "5.9", "versionEndExcluding": "5.10.253"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.9", "versionEndExcluding": "5.15.203"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.9", "versionEndExcluding": "6.1.168"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.9", "versionEndExcluding": "6.6.131"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.9", "versionEndExcluding": "6.12.80"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.9", "versionEndExcluding": "6.18.21"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.9", "versionEndExcluding": "6.19.11"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.9", "versionEndExcluding": "7.0"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/e6cc490048f78b009259a5f032acead9f789c34c"}, {"url": "https://git.kernel.org/stable/c/239d734c00644072862fa833805c4471573b1445"}, {"url": "https://git.kernel.org/stable/c/bda27fc0b4eb3a425d9a18475c4cb94fbe862c60"}, {"url": "https://git.kernel.org/stable/c/d38135af04a3ad8a585c899d176efc8e97853115"}, {"url": "https://git.kernel.org/stable/c/a89434a6188d8430ea31120da96e3e4cefb58686"}, {"url": "https://git.kernel.org/stable/c/8147e304d7d32fd5c3e943babc296ce2873dc279"}, {"url": "https://git.kernel.org/stable/c/558e3275d8a3b101be18a7fe7d1634053e9d9b07"}, {"url": "https://git.kernel.org/stable/c/4f24a767e3d64a5f58c595b5c29b6063a201f1e3"}], "title": "xfs: stop reclaim before pushing AIL during unmount", "x_generator": {"engine": "bippy-1.2.0"}}}}

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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."}], "id": "CVE-2026-31455", "lastModified": "2026-06-05T17:47:32.343", "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": "[email protected]", "type": "Primary"}]}, "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": "[email protected]", "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"}

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