CVE-2015-8952

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.

• CWE-19

• http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=82939d7999dfc1f1998c4b1c12e2f19edbdff272Patch
• http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=be0726d33cb8f411945884664924bed3cb8c70eePatch
• http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=f9a61eb4e2471c56a63cd804c7474128138c38acPatch
• http://www.openwall.com/lists/oss-security/2016/08/22/2Third Party Advisory
• http://www.openwall.com/lists/oss-security/2016/08/25/4Patch, Third Party Advisory
• https://bugzilla.kernel.org/show_bug.cgi?id=107301Issue Tracking, Third Party Advisory
• https://bugzilla.redhat.com/show_bug.cgi?id=1360968Issue Tracking, Third Party Advisory, VDB Entry
• https://github.com/torvalds/linux/commit/82939d7999dfc1f1998c4b1c12e2f19edbdff272Vendor Advisory
• https://github.com/torvalds/linux/commit/be0726d33cb8f411945884664924bed3cb8c70eeIssue Tracking, Patch
• https://github.com/torvalds/linux/commit/f9a61eb4e2471c56a63cd804c7474128138c38acIssue Tracking
• https://lwn.net/Articles/668718/Third Party Advisory
• https://usn.ubuntu.com/3582-1/
• https://usn.ubuntu.com/3582-2/
• http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=82939d7999dfc1f1998c4b1c12e2f19edbdff272Patch
• http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=be0726d33cb8f411945884664924bed3cb8c70eePatch
• http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=f9a61eb4e2471c56a63cd804c7474128138c38acPatch
• http://www.openwall.com/lists/oss-security/2016/08/22/2Third Party Advisory
• http://www.openwall.com/lists/oss-security/2016/08/25/4Patch, Third Party Advisory
• https://bugzilla.kernel.org/show_bug.cgi?id=107301Issue Tracking, Third Party Advisory
• https://bugzilla.redhat.com/show_bug.cgi?id=1360968Issue Tracking, Third Party Advisory, VDB Entry
• https://github.com/torvalds/linux/commit/82939d7999dfc1f1998c4b1c12e2f19edbdff272Vendor Advisory
• https://github.com/torvalds/linux/commit/be0726d33cb8f411945884664924bed3cb8c70eeIssue Tracking, Patch
• https://github.com/torvalds/linux/commit/f9a61eb4e2471c56a63cd804c7474128138c38acIssue Tracking
• https://lwn.net/Articles/668718/Third Party Advisory
• https://usn.ubuntu.com/3582-1/
• https://usn.ubuntu.com/3582-2/

Published

Oct 16, 2016

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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