Public Date:
2011-A-0075, 2011-A-0066, 2011-A-0066
606611: CVE-2010-2240 kernel: mm: keep a guard page below a grow-down stack segment

The MITRE CVE dictionary describes this issue as:

The do_anonymous_page function in mm/memory.c in the Linux kernel before, 2.6.32.x before, 2.6.34.x before, and 2.6.35.x before does not properly separate the stack and the heap, which allows context-dependent attackers to execute arbitrary code by writing to the bottom page of a shared memory segment, as demonstrated by a memory-exhaustion attack against the X.Org X server.

Find out more about CVE-2010-2240 from the MITRE CVE dictionary dictionary and NIST NVD.

CVSS v2 metrics

NOTE: The following CVSS v2 metrics and score provided are preliminary and subject to review.

Base Score 7.2
Base Metrics AV:L/AC:L/Au:N/C:C/I:C/A:C
Access Vector Local
Access Complexity Low
Authentication None
Confidentiality Impact Complete
Integrity Impact Complete
Availability Impact Complete

Find out more about Red Hat support for the Common Vulnerability Scoring System (CVSS).

Red Hat Security Errata

Platform Errata Release Date
MRG Grid for RHEL 5 Server (kernel-rt) RHSA-2010:0631 2010-08-17
Red Hat Enterprise Linux version 4 (kernel) RHSA-2010:0676 2010-09-07
Red Hat Enterprise Linux EUS (v. 5.3 server) (kernel) RHSA-2010:0660 2010-08-30
Red Hat Enterprise Linux version 5 (kernel) RHSA-2010:0661 2010-08-30
Red Hat Enterprise Linux ES EUS (v. 4.7) (kernel) RHSA-2010:0677 2010-09-07
Red Hat Enterprise Linux EUS (v. 5.4 server) (kernel) RHSA-2010:0670 2010-09-02
Red Hat Enterprise Linux ES (v. 3 ELS) (kernel) RHSA-2010:0882 2010-11-12


Red Hat would like to thank the X.Org security team for reporting this issue. Upstream acknowledges Rafal Wojtczuk as the original reporter.