CVE-2026-43153

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The vulnerable XFS attr path is reached through local extended-attribute syscalls such as setxattr/removexattr on a mounted XFS filesystem, not through network packet processing.\nAC:L - Given a crafted or corrupted one-block XFS attribute leaf, the erroneous buffer release path is deterministic and does not require winning a race or depending on heap layout to trigger.\nPR:L - An unprivileged local user can reach the update path through user.* xattrs on regular files or directories for which they have normal write permission; the trigger does not require CAP_SYS_ADMIN once the filesystem is mounted.\nUI:N - The attacker can invoke the xattr operation directly; no additional victim action is needed for the vulnerable code path after the XFS filesystem is available.\nS:U - The corruption occurs inside the kernel/XFS buffer management path and does not cross a separate security authority such as a VM or device isolation boundary.\nC:H - The stale xfs_buf pointer can be released a second time, creating use-after-free/refcount corruption in kernel buffer/log-item objects, which can reasonably support kernel memory disclosure primitives.\nI:H - 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vulnerability has been resolved:\n\nxfs: remove xfs_attr_leaf_hasname\n\nThe calling convention of xfs_attr_leaf_hasname() is problematic, because\nit returns a NULL buffer when xfs_attr3_leaf_read fails, a valid buffer\nwhen xfs_attr3_leaf_lookup_int returns -ENOATTR or -EEXIST, and a\nnon-NULL buffer pointer for an already released buffer when\nxfs_attr3_leaf_lookup_int fails with other error values.\n\nFix this by simply open coding xfs_attr_leaf_hasname in the callers, so\nthat the buffer release code is done by each caller of\nxfs_attr3_leaf_read."}, {"lang": "es", "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nxfs: eliminar xfs_attr_leaf_hasname\n\nLa convenci\u00f3n de llamada de xfs_attr_leaf_hasname() es problem\u00e1tica, porque devuelve un b\u00fafer NULL cuando xfs_attr3_leaf_read falla, un b\u00fafer v\u00e1lido cuando xfs_attr3_leaf_lookup_int devuelve -ENOATTR o -EEXIST, y un puntero de b\u00fafer no-NULL para un b\u00fafer ya liberado cuando xfs_attr3_leaf_lookup_int falla con otros valores de error.\n\nSolucione esto simplemente codificando abiertamente xfs_attr_leaf_hasname en los llamadores, para que el c\u00f3digo de liberaci\u00f3n del b\u00fafer sea realizado por cada llamador de xfs_attr3_leaf_read."}], "id": "CVE-2026-43153", "lastModified": "2026-11-11T21:10:00.200", "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": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-43153", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-10-16T15:15:12.446055Z", "version": "2.0.3"}}]}, "published": "2026-05-06T12:16:33.073", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/2fbc8421d1db102c0e5458607e042a23a03648b1"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/3a65ea768b8094e4699e72f9ab420eb9e0f3f568"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/457121c01f609b9934addbb04d5c1ef638c71c61"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/530082df991903f3330354e99e0cb7b05debfa86"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/759e44a6cba8e81d945ffc269a326ec39e7f54f5"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/dfb3474230d392f809359f15aeaa9be4b1798199"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "NVD-CWE-Other"}], "source": "nvd@nist.gov", "type": "Primary"}, {"description": [{"lang": "en", "value": "CWE-416"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

{"bugzilla": {"description": "kernel: xfs: remove xfs_attr_leaf_hasname", "id": "2467102", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2467102"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.0", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-825", "details": ["A flaw was found in the Linux kernel's XFS filesystem. The `xfs_attr_leaf_hasname()` function has a problematic calling convention that can lead to incorrect buffer handling. This issue can result in the use of already released memory buffers, potentially causing memory corruption or system instability. A local attacker could exploit this vulnerability to cause a denial of service."], "name": "CVE-2026-43153", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "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": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "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-2026-43153\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-43153\nhttps://lore.kernel.org/linux-cve-announce/2026050629-CVE-2026-43153-9294@gregkh/T"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[07120f1abdff80f3d1351f733661abe28d609535,2fbc8421d1db102c0e5458607e042a23a03648b1)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[07120f1abdff80f3d1351f733661abe28d609535,457121c01f609b9934addbb04d5c1ef638c71c61)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[07120f1abdff80f3d1351f733661abe28d609535,530082df991903f3330354e99e0cb7b05debfa86)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[07120f1abdff80f3d1351f733661abe28d609535,3a65ea768b8094e4699e72f9ab420eb9e0f3f568)"}}], "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": "semver", "value": "5.9"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,5.9)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.75,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.16,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.19.6,6.20.0)"}}, {"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": "2026-05-06T13:45:04.297783+00:00", "updated": "2026-10-23T07:45:17.032493+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}