CVE-2015-8952

{"containers": {"cna": {"affected": [{"product": "n/a", "vendor": "n/a", "versions": [{"status": "affected", "version": "n/a"}]}], "datePublic": "2015-11-05T00:00:00.000Z", "descriptions": [{"lang": "en", "value": "The mbcache feature in the ext2 and ext4 filesystem implementations in the Linux kernel before 4.6 mishandles xattr block caching, which allows local users to cause a denial of service (soft lockup) via filesystem operations in environments that use many attributes, as demonstrated by Ceph and Samba."}], "problemTypes": [{"descriptions": [{"description": "n/a", "lang": "en", "type": "text"}]}], "providerMetadata": {"dateUpdated": "2018-03-15T09:57:02.000Z", "orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "shortName": "mitre"}, "references": [{"tags": ["x_refsource_CONFIRM"], "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1360968"}, {"tags": ["x_refsource_CONFIRM"], "url": "https://github.com/torvalds/linux/commit/f9a61eb4e2471c56a63cd804c7474128138c38ac"}, {"tags": ["x_refsource_CONFIRM"], "url": "https://github.com/torvalds/linux/commit/82939d7999dfc1f1998c4b1c12e2f19edbdff272"}, {"name": "USN-3582-1", "tags": ["vendor-advisory", "x_refsource_UBUNTU"], "url": "https://usn.ubuntu.com/3582-1/"}, {"tags": ["x_refsource_CONFIRM"], "url": "https://bugzilla.kernel.org/show_bug.cgi?id=107301"}, {"name": "[oss-security] 20160825 Re: CVE request: Linux kernel mbcache lock contention denial of service.", "tags": ["mailing-list", "x_refsource_MLIST"], "url": "http://www.openwall.com/lists/oss-security/2016/08/25/4"}, {"tags": ["x_refsource_CONFIRM"], "url": "http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=82939d7999dfc1f1998c4b1c12e2f19edbdff272"}, {"tags": ["x_refsource_CONFIRM"], "url": "http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=be0726d33cb8f411945884664924bed3cb8c70ee"}, {"name": "[oss-security] 20160822 CVE request: Linux kernel mbcache lock contention denial of service.", "tags": ["mailing-list", "x_refsource_MLIST"], "url": "http://www.openwall.com/lists/oss-security/2016/08/22/2"}, {"tags": ["x_refsource_CONFIRM"], "url": "https://github.com/torvalds/linux/commit/be0726d33cb8f411945884664924bed3cb8c70ee"}, {"tags": ["x_refsource_CONFIRM"], "url": "http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=f9a61eb4e2471c56a63cd804c7474128138c38ac"}, {"tags": ["x_refsource_CONFIRM"], "url": "https://lwn.net/Articles/668718/"}, {"name": "USN-3582-2", "tags": ["vendor-advisory", "x_refsource_UBUNTU"], "url": "https://usn.ubuntu.com/3582-2/"}], "x_legacyV4Record": {"CVE_data_meta": {"ASSIGNER": "cve@mitre.org", "ID": "CVE-2015-8952", "STATE": "PUBLIC"}, "affects": {"vendor": {"vendor_data": [{"product": {"product_data": [{"product_name": "n/a", "version": {"version_data": [{"version_value": "n/a"}]}}]}, "vendor_name": "n/a"}]}}, "data_format": "MITRE", "data_type": "CVE", "data_version": "4.0", "description": {"description_data": [{"lang": "eng", "value": "The mbcache feature in the ext2 and ext4 filesystem implementations in the Linux kernel before 4.6 mishandles xattr block caching, which allows local users to cause a denial of service (soft lockup) via filesystem operations in environments that use many attributes, as demonstrated by Ceph and Samba."}]}, "problemtype": {"problemtype_data": [{"description": [{"lang": "eng", "value": "n/a"}]}]}, "references": {"reference_data": [{"name": "https://bugzilla.redhat.com/show_bug.cgi?id=1360968", "refsource": "CONFIRM", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1360968"}, {"name": "https://github.com/torvalds/linux/commit/f9a61eb4e2471c56a63cd804c7474128138c38ac", "refsource": "CONFIRM", "url": "https://github.com/torvalds/linux/commit/f9a61eb4e2471c56a63cd804c7474128138c38ac"}, {"name": "https://github.com/torvalds/linux/commit/82939d7999dfc1f1998c4b1c12e2f19edbdff272", "refsource": "CONFIRM", "url": "https://github.com/torvalds/linux/commit/82939d7999dfc1f1998c4b1c12e2f19edbdff272"}, {"name": "USN-3582-1", "refsource": "UBUNTU", "url": "https://usn.ubuntu.com/3582-1/"}, {"name": "https://bugzilla.kernel.org/show_bug.cgi?id=107301", "refsource": "CONFIRM", "url": "https://bugzilla.kernel.org/show_bug.cgi?id=107301"}, {"name": "[oss-security] 20160825 Re: CVE request: Linux kernel mbcache lock contention denial of service.", "refsource": "MLIST", "url": "http://www.openwall.com/lists/oss-security/2016/08/25/4"}, {"name": "http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=82939d7999dfc1f1998c4b1c12e2f19edbdff272", "refsource": "CONFIRM", "url": "http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=82939d7999dfc1f1998c4b1c12e2f19edbdff272"}, {"name": "http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=be0726d33cb8f411945884664924bed3cb8c70ee", "refsource": "CONFIRM", "url": "http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=be0726d33cb8f411945884664924bed3cb8c70ee"}, {"name": "[oss-security] 20160822 CVE request: Linux kernel mbcache lock contention denial of service.", "refsource": "MLIST", "url": "http://www.openwall.com/lists/oss-security/2016/08/22/2"}, {"name": "https://github.com/torvalds/linux/commit/be0726d33cb8f411945884664924bed3cb8c70ee", "refsource": "CONFIRM", "url": "https://github.com/torvalds/linux/commit/be0726d33cb8f411945884664924bed3cb8c70ee"}, {"name": "http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=f9a61eb4e2471c56a63cd804c7474128138c38ac", "refsource": "CONFIRM", "url": "http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=f9a61eb4e2471c56a63cd804c7474128138c38ac"}, {"name": "https://lwn.net/Articles/668718/", "refsource": "CONFIRM", "url": "https://lwn.net/Articles/668718/"}, {"name": "USN-3582-2", "refsource": "UBUNTU", "url": "https://usn.ubuntu.com/3582-2/"}]}}}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-06T08:36:30.872Z"}, "title": "CVE Program Container", "references": [{"tags": ["x_refsource_CONFIRM", "x_transferred"], "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1360968"}, {"tags": ["x_refsource_CONFIRM", "x_transferred"], "url": "https://github.com/torvalds/linux/commit/f9a61eb4e2471c56a63cd804c7474128138c38ac"}, {"tags": ["x_refsource_CONFIRM", "x_transferred"], "url": "https://github.com/torvalds/linux/commit/82939d7999dfc1f1998c4b1c12e2f19edbdff272"}, {"name": "USN-3582-1", "tags": ["vendor-advisory", "x_refsource_UBUNTU", "x_transferred"], "url": "https://usn.ubuntu.com/3582-1/"}, {"tags": ["x_refsource_CONFIRM", "x_transferred"], "url": "https://bugzilla.kernel.org/show_bug.cgi?id=107301"}, {"name": "[oss-security] 20160825 Re: CVE request: Linux kernel mbcache lock contention denial of service.", "tags": ["mailing-list", "x_refsource_MLIST", "x_transferred"], "url": "http://www.openwall.com/lists/oss-security/2016/08/25/4"}, {"tags": ["x_refsource_CONFIRM", "x_transferred"], "url": "http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=82939d7999dfc1f1998c4b1c12e2f19edbdff272"}, {"tags": ["x_refsource_CONFIRM", "x_transferred"], "url": "http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=be0726d33cb8f411945884664924bed3cb8c70ee"}, {"name": "[oss-security] 20160822 CVE request: Linux kernel mbcache lock contention denial of service.", "tags": ["mailing-list", "x_refsource_MLIST", "x_transferred"], "url": "http://www.openwall.com/lists/oss-security/2016/08/22/2"}, {"tags": ["x_refsource_CONFIRM", "x_transferred"], "url": "https://github.com/torvalds/linux/commit/be0726d33cb8f411945884664924bed3cb8c70ee"}, {"tags": ["x_refsource_CONFIRM", "x_transferred"], "url": "http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=f9a61eb4e2471c56a63cd804c7474128138c38ac"}, {"tags": ["x_refsource_CONFIRM", "x_transferred"], "url": "https://lwn.net/Articles/668718/"}, {"name": "USN-3582-2", "tags": ["vendor-advisory", "x_refsource_UBUNTU", "x_transferred"], "url": "https://usn.ubuntu.com/3582-2/"}]}]}, "cveMetadata": {"assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "assignerShortName": "mitre", "cveId": "CVE-2015-8952", "datePublished": "2016-10-16T21:00:00.000Z", "dateReserved": "2016-08-25T00:00:00.000Z", "dateUpdated": "2024-08-06T08:36:30.872Z", "state": "PUBLISHED"}, "dataType": "CVE_RECORD", "dataVersion": "5.1"}

{}

{"affected": [{"affectedData": [{"product": "n/a", "vendor": "n/a", "versions": [{"status": "affected", "version": "n/a"}]}], "source": "cve@mitre.org"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "02606D90-EB6B-45DE-B022-6E5783BD64FA", "versionEndIncluding": "4.5.7", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "The mbcache feature in the ext2 and ext4 filesystem implementations in the Linux kernel before 4.6 mishandles xattr block caching, which allows local users to cause a denial of service (soft lockup) via filesystem operations in environments that use many attributes, as demonstrated by Ceph and Samba."}, {"lang": "es", "value": "La funcionalidad mbcache en las implementaciones del sistema de archivos ext2 y ext4 en el kernel de Linux en versiones anteriores a 4.6 no maneja adecuadamente bloque de almacenamiento en cach\u00e9 xattr, lo que permite a usuarios locales provocar una denegaci\u00f3n de servicio (bloqueo d\u00e9bil) a trav\u00e9s de operaciones de sistema de archivos en entornos que usan muchos atributos, como se demuestra por Ceph y Samba."}], "id": "CVE-2015-8952", "lastModified": "2026-06-17T00:35:33.167", "metrics": {"cvssMetricV2": [{"acInsufInfo": true, "baseSeverity": "LOW", "cvssData": {"accessComplexity": "LOW", "accessVector": "LOCAL", "authentication": "NONE", "availabilityImpact": "PARTIAL", "baseScore": 2.1, "confidentialityImpact": "NONE", "integrityImpact": "NONE", "vectorString": "AV:L/AC:L/Au:N/C:N/I:N/A:P", "version": "2.0"}, "exploitabilityScore": 3.9, "impactScore": 2.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV30": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.0"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2016-10-16T21:59:01.910", "references": [{"source": "cve@mitre.org", "tags": ["Patch"], "url": "http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=82939d7999dfc1f1998c4b1c12e2f19edbdff272"}, {"source": "cve@mitre.org", "tags": ["Patch"], "url": "http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=be0726d33cb8f411945884664924bed3cb8c70ee"}, {"source": "cve@mitre.org", "tags": ["Patch"], "url": "http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=f9a61eb4e2471c56a63cd804c7474128138c38ac"}, {"source": "cve@mitre.org", "tags": ["Third Party Advisory"], "url": "http://www.openwall.com/lists/oss-security/2016/08/22/2"}, {"source": "cve@mitre.org", "tags": ["Patch", "Third Party Advisory"], "url": "http://www.openwall.com/lists/oss-security/2016/08/25/4"}, {"source": "cve@mitre.org", "tags": ["Issue Tracking", "Third Party Advisory"], "url": "https://bugzilla.kernel.org/show_bug.cgi?id=107301"}, {"source": "cve@mitre.org", "tags": ["Issue Tracking", "Third Party Advisory", "VDB Entry"], "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1360968"}, {"source": "cve@mitre.org", "tags": ["Vendor Advisory"], "url": "https://github.com/torvalds/linux/commit/82939d7999dfc1f1998c4b1c12e2f19edbdff272"}, {"source": "cve@mitre.org", "tags": ["Issue Tracking", "Patch"], "url": "https://github.com/torvalds/linux/commit/be0726d33cb8f411945884664924bed3cb8c70ee"}, {"source": "cve@mitre.org", "tags": ["Issue Tracking"], "url": "https://github.com/torvalds/linux/commit/f9a61eb4e2471c56a63cd804c7474128138c38ac"}, {"source": "cve@mitre.org", "tags": ["Third Party Advisory"], "url": "https://lwn.net/Articles/668718/"}, {"source": "cve@mitre.org", "url": "https://usn.ubuntu.com/3582-1/"}, {"source": "cve@mitre.org", "url": "https://usn.ubuntu.com/3582-2/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=82939d7999dfc1f1998c4b1c12e2f19edbdff272"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=be0726d33cb8f411945884664924bed3cb8c70ee"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=f9a61eb4e2471c56a63cd804c7474128138c38ac"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "http://www.openwall.com/lists/oss-security/2016/08/22/2"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch", "Third Party Advisory"], "url": "http://www.openwall.com/lists/oss-security/2016/08/25/4"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Issue Tracking", "Third Party Advisory"], "url": "https://bugzilla.kernel.org/show_bug.cgi?id=107301"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Issue Tracking", "Third Party Advisory", "VDB Entry"], "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1360968"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Vendor Advisory"], "url": "https://github.com/torvalds/linux/commit/82939d7999dfc1f1998c4b1c12e2f19edbdff272"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Issue Tracking", "Patch"], "url": "https://github.com/torvalds/linux/commit/be0726d33cb8f411945884664924bed3cb8c70ee"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Issue Tracking"], "url": "https://github.com/torvalds/linux/commit/f9a61eb4e2471c56a63cd804c7474128138c38ac"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://lwn.net/Articles/668718/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://usn.ubuntu.com/3582-1/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://usn.ubuntu.com/3582-2/"}], "sourceIdentifier": "cve@mitre.org", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-19"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"acknowledgement": "Red Hat would like to thank Laurent Guerby for reporting this issue.", "bugzilla": {"description": "kernel: mbcache code subject to softlockup DOS in cache management", "id": "1360968", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1360968"}, "csaw": false, "cvss": {"cvss_base_score": "4.9", "cvss_scoring_vector": "AV:L/AC:L/Au:N/C:N/I:N/A:C", "status": "draft"}, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-667", "details": ["The mbcache feature in the ext2 and ext4 filesystem implementations in the Linux kernel before 4.6 mishandles xattr block caching, which allows local users to cause a denial of service (soft lockup) via filesystem operations in environments that use many attributes, as demonstrated by Ceph and Samba.", "A design flaw was found in the file extended attribute handling of the Linux kernel's handling of cached attributes. Too many entries in the cache cause a soft lockup while attempting to iterate the cache and access relevant locks."], "name": "CVE-2015-8952", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:5", "fix_state": "Will not fix", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 5"}, {"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:/a:redhat:enterprise_mrg:2", "fix_state": "Not affected", "package_name": "realtime-kernel", "product_name": "Red Hat Enterprise MRG 2"}], "public_date": "2016-08-22T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2015-8952\nhttps://nvd.nist.gov/vuln/detail/CVE-2015-8952"], "statement": "This issue does not affect any shiping version of Red Hat Enterprise Linux.", "threat_severity": "Low"}

{}