The pmd_none_or_trans_huge_or_clear_bad function in include/asm-generic/pgtable.h in the Linux kernel before...
Vulnerability 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.
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=1198457
- http://rhn.redhat.com/errata/RHSA-2015-0694.html
- http://rhn.redhat.com/errata/RHSA-2015-0290.html
- 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
- https://github.com/torvalds/linux/commit/ee53664bda169f519ce3c6a22d378f0b946c8178
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Weaknesses (CWE)
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MITRE ATT&CK TTPs
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