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.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
n/a n/a
n/aaffected
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/ ↗