CVE-2015-8952
medium
CVSS v3
5.5
CVSS v4 NEW
—
VIR risk
5.5
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.
Predictions
Exploit likelihood
55%
Patch ETA
—
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| sles | affected | | |
| debian | bookworm | fixed | 4.6.1-1 |
| debian | bullseye | fixed | 4.6.1-1 |
| debian | forky | fixed | 4.6.1-1 |
| debian | sid | fixed | 4.6.1-1 |
| debian | trixie | fixed | 4.6.1-1 |
| linux-kernel | affected | |
References
- https://www.suse.com/security/cve/CVE-2015-8952.html
- 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://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=f9a61eb4e2471c56a63cd804c7474128138c38ac
- http://www.openwall.com/lists/oss-security/2016/08/22/2
- http://www.openwall.com/lists/oss-security/2016/08/25/4
- https://bugzilla.kernel.org/show_bug.cgi?id=107301
- https://bugzilla.redhat.com/show_bug.cgi?id=1360968
- https://github.com/torvalds/linux/commit/82939d7999dfc1f1998c4b1c12e2f19edbdff272
- https://github.com/torvalds/linux/commit/be0726d33cb8f411945884664924bed3cb8c70ee
- https://github.com/torvalds/linux/commit/f9a61eb4e2471c56a63cd804c7474128138c38ac
- https://lwn.net/Articles/668718/
- https://usn.ubuntu.com/3582-1/
- https://usn.ubuntu.com/3582-2/
- https://security-tracker.debian.org/tracker/CVE-2015-8952
CWEs
CWE-19
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.