CVE-2014-8173
Description
The pmd_none_or_trans_huge_or_clear_bad function in include/asm-generic/pgtable.h in the Linux kernel before 3.13 on NUMA systems does not properly determine whether a Page Middle Directory (PMD) entry is a transparent huge-table entry, which allows local users to cause a denial of service (NULL pointer dereference and system crash) or possibly have unspecified other impact via a crafted MADV_WILLNEED madvise system call that leverages the absence of a page-table lock.
Predictions
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 |
|---|---|---|---|
| linux-kernel | affected | 3.10.76 | |
| debian | bookworm | fixed | 3.13.4-1 |
| debian | bullseye | fixed | 3.13.4-1 |
| debian | forky | fixed | 3.13.4-1 |
| debian | sid | fixed | 3.13.4-1 |
| debian | trixie | fixed | 3.13.4-1 |
References
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=ee53664bda169f519ce3c6a22d378f0b946c8178
- http://lists.opensuse.org/opensuse-security-announce/2015-04/msg00009.html
- http://rhn.redhat.com/errata/RHSA-2015-0290.html
- http://rhn.redhat.com/errata/RHSA-2015-0694.html
- https://bugzilla.redhat.com/show_bug.cgi?id=1198457
- https://github.com/torvalds/linux/commit/ee53664bda169f519ce3c6a22d378f0b946c8178
- https://security-tracker.debian.org/tracker/CVE-2014-8173
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.