CVE-2026-64185

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Removing it silently destroys a sysfs group that the\ncaller did not create.\n\nOnly remove the directory if we created it ourselves. 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remove existing directory on update failure\n\nWhen sysfs_update_group() is called for a named group and create_files()\nfails (e.g. -ENOMEM), internal_create_group() calls kernfs_remove(kn) on\nthe group directory. In the update path, kn was obtained via\nkernfs_find_and_get() and refers to a directory that already existed\nbefore this call. Removing it silently destroys a sysfs group that the\ncaller did not create.\n\nOnly remove the directory if we created it ourselves. On update failure\nthe directory remains as it is left empty by remove_files() inside\ncreate_files(), but can be repopulated by a retry."}], "id": "CVE-2026-64185", "lastModified": "2026-11-06T17:18:39.790", "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"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-64185", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-11-06T16:31:44.287179Z", "version": "2.0.3"}}]}, "published": "2026-07-19T16:18:00.917", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/14f2c14ae86c4af17a0a9f8ab46dacf2d5fd1d8a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/237557b8a81ab948e8332f7c0058e758f081c0a3"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/31527d80234caf83dc96ad478645e57df9de4472"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/48fa96538bd2868034d33429e4565fda384d0736"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/57b285e0368290aa55f79ba11419b96d0ebdb418"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/708f6926f61f71e09b5e9fd668b9882ccd46e69f"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/c5e125c828b701afaf7493b42a14aa89362ff36d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/ccadd32cc1263802a5969c9efe0e96225450428c"}], "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: sysfs: don't remove existing directory on update failure", "id": "2502504", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2502504"}, "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-253", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nsysfs: don't remove existing directory on update failure\nWhen sysfs_update_group() is called for a named group and create_files()\nfails (e.g. -ENOMEM), internal_create_group() calls kernfs_remove(kn) on\nthe group directory. In the update path, kn was obtained via\nkernfs_find_and_get() and refers to a directory that already existed\nbefore this call. Removing it silently destroys a sysfs group that the\ncaller did not create.\nOnly remove the directory if we created it ourselves. On update failure\nthe directory remains as it is left empty by remove_files() inside\ncreate_files(), but can be repopulated by a retry.", "A flaw was found in the Linux kernel's sysfs component. When an attempt to update a sysfs group fails, the system can incorrectly remove an already existing sysfs directory. This unintended removal can lead to a denial of service or system instability by silently destroying critical system interface groups, which may then need to be repopulated."], "name": "CVE-2026-64185", "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": "2026-07-19T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-64185\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-64185\nhttps://lore.kernel.org/linux-cve-announce/2026071939-CVE-2026-64185-8b0d@gregkh/T"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[c855cf2759d27142f771173d9fd8e7fdf9cf5138,c5e125c828b701afaf7493b42a14aa89362ff36d)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[c855cf2759d27142f771173d9fd8e7fdf9cf5138,ccadd32cc1263802a5969c9efe0e96225450428c)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[c855cf2759d27142f771173d9fd8e7fdf9cf5138,14f2c14ae86c4af17a0a9f8ab46dacf2d5fd1d8a)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[c855cf2759d27142f771173d9fd8e7fdf9cf5138,31527d80234caf83dc96ad478645e57df9de4472)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[c855cf2759d27142f771173d9fd8e7fdf9cf5138,57b285e0368290aa55f79ba11419b96d0ebdb418)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[c855cf2759d27142f771173d9fd8e7fdf9cf5138,48fa96538bd2868034d33429e4565fda384d0736)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[c855cf2759d27142f771173d9fd8e7fdf9cf5138,708f6926f61f71e09b5e9fd668b9882ccd46e69f)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[c855cf2759d27142f771173d9fd8e7fdf9cf5138,237557b8a81ab948e8332f7c0058e758f081c0a3)"}}], "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": "4.19"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,4.19)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[5.10.258,5.11.0]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[5.15.209,5.16.0]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.1.175,6.2.0]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.142,6.7.0]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.92,6.13.0]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.34,6.19.0]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.0.11,7.1.0]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.1,*]"}}], "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": "2026-07-21T19:45:03.097845+00:00", "updated": "2026-08-13T12:00:05.157510+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}