CVE-2014-8173
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…
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.40%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 2.0
- 7.2 HIGHAV:L/AC:L/Au:N/C:C/I:C/A:C
- EPSS
- 0.40% probability · 34th percentile
- CISA KEV
- Not listed
- Affected
- linux/linux kernel
- Source
- secalert@redhat.com
References
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=ee53664bda169f519ce3c6a22d378f0b946c8178Broken Link
- http://lists.opensuse.org/opensuse-security-announce/2015-04/msg00009.htmlThird Party Advisory
- http://rhn.redhat.com/errata/RHSA-2015-0290.htmlThird Party Advisory, VDB Entry
- http://rhn.redhat.com/errata/RHSA-2015-0694.htmlThird Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1198457Issue Tracking
- https://github.com/torvalds/linux/commit/ee53664bda169f519ce3c6a22d378f0b946c8178Third Party Advisory
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=ee53664bda169f519ce3c6a22d378f0b946c8178Broken Link
- http://lists.opensuse.org/opensuse-security-announce/2015-04/msg00009.htmlThird Party Advisory
- http://rhn.redhat.com/errata/RHSA-2015-0290.htmlThird Party Advisory, VDB Entry
- http://rhn.redhat.com/errata/RHSA-2015-0694.htmlThird Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1198457Issue Tracking
- https://github.com/torvalds/linux/commit/ee53664bda169f519ce3c6a22d378f0b946c8178Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.