National Vulnerability Database

National Vulnerability Database

National Vulnerability

CVE-2009-2691 Detail


The mm_for_maps function in fs/proc/base.c in the Linux kernel and earlier allows local users to read (1) maps and (2) smaps files under proc/ via vectors related to ELF loading, a setuid process, and a race condition.

Source:  MITRE      Last Modified:  08/14/2009

Quick Info

CVE Dictionary Entry:
Original release date:
Last revised:


CVSS Severity (version 2.0):
CVSS v2 Base Score:
2.1 LOW
(AV:L/AC:L/Au:N/C:P/I:N/A:N) (legend)
Impact Subscore:
Exploitability Subscore:
CVSS Version 2 Metrics:
Access Vector:
Locally exploitable
Access Complexity:
Not required to exploit
Impact Type:
Allows unauthorized disclosure of information

Vendor Statements (disclaimer)

Official Statement from Red Hat (11/04/2009)

The Red Hat Security Response Team has rated this issue as having moderate security impact. We currently have no plans to fix this flaw in Red Hat Enterprise Linux 3, 4, and 5 as it is not possible to trigger the information leak if the suid_dumpable tunable is set to zero (which is the default). It was addressed in Red Hat Enterprise MRG via:

References to Advisories, Solutions, and Tools

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Hyperlink Resource Type Source Name;a=commit;h=00f89d218523b9bf6b522349c039d5ac80aa536d External Source CONFIRM;a=commit;h=00f89d218523b9bf6b522349c039d5ac80aa536d;a=commit;h=13f0feafa6b8aead57a2a328e2fca6a5828bf286 External Source CONFIRM;a=commit;h=13f0feafa6b8aead57a2a328e2fca6a5828bf286;a=commit;h=704b836cbf19e885f8366bccb2e4b0474346c02d External Source CONFIRM;a=commit;h=704b836cbf19e885f8366bccb2e4b0474346c02d External Source MLIST [linux-kernel] 20090623 [PATCH 0/1] mm_for_maps: simplify, use ptrace_may_access() Patch External Source MLIST [linux-kernel] 20090623 [PATCH 1/1] mm_for_maps: simplify, use ptrace_may_access() Patch External Source MLIST [linux-kernel] 20090710 [PATCH 1/2] mm_for_maps: shift down_read(mmap_sem) to the caller Patch External Source MLIST [linux-kernel] 20090710 [PATCH 2/2] mm_for_maps: take ->cred_guard_mutex to fix the race External Source DEBIAN DSA-2005 External Source MLIST [oss-security] 20090811 CVE-2009-2691 kernel: /proc/$pid/maps visible during initial setuid ELF loading External Source BID 36019 Vendor Advisory External Source VUPEN ADV-2009-2246 External Source CONFIRM External Source XF linux-kernel-mmformaps-info-disclosure(52401) External Source REDHAT RHSA-2009:1540 External Source FEDORA FEDORA-2009-9044

Technical Details

Vulnerability Type (View All)

  • Information Leak / Disclosure (CWE-200)

Change History 2 change records found - show changes