The mbcache feature in the ext2 and ext4 filesystem implementations...
Vulnerability Description
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.
Impact Analysis
Refer to official advisory for detailed impact metrics.
Remediation
Ensure systems are updated to the latest vendor-supplied patch levels.
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Credits & Attribution
No credits recorded in the NVD database.
References
- https://bugzilla.redhat.com/show_bug.cgi?id=1360968
- https://github.com/torvalds/linux/commit/f9a61eb4e2471c56a63cd804c7474128138c38ac
- https://github.com/torvalds/linux/commit/82939d7999dfc1f1998c4b1c12e2f19edbdff272
- https://usn.ubuntu.com/3582-1/
- https://bugzilla.kernel.org/show_bug.cgi?id=107301
- http://www.openwall.com/lists/oss-security/2016/08/25/4
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=82939d7999dfc1f1998c4b1c12e2f19edbdff272
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=be0726d33cb8f411945884664924bed3cb8c70ee
- http://www.openwall.com/lists/oss-security/2016/08/22/2
- https://github.com/torvalds/linux/commit/be0726d33cb8f411945884664924bed3cb8c70ee
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=f9a61eb4e2471c56a63cd804c7474128138c38ac
- https://lwn.net/Articles/668718/
- https://usn.ubuntu.com/3582-2/
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CVSS Vectors
Weaknesses (CWE)
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MITRE ATT&CK TTPs
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