The mm_for_maps function in fs/proc/base.c in the Linux kernel 2.6.30.4 and earlier…
Priority LOW 11CWE-200Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- None
- User interaction
- — Not recorded in CVSS 2.0
- Attack complexity
- Low
- Impact type
- Information disclosure
- Confidentiality · integrity · availability
- Partial · None · None
- Fix status
- Fixed
Attack profile from CVSS 2.0 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-200.
Summary
The mm_for_maps function in fs/proc/base.c in the Linux kernel 2.6.30.4 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.
Why it matters now
EPSS 0.00393 33rd percentileScored 2026-11-07
Fix Fixed Red Hat: 1 advisory
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 10
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | up to 2.6.30.4 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:2.6.30:*:*:*:*:*:*:* | 2.6.30 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:2.6.30:rc1:*:*:*:*:*:* | 2.6.30 rc1 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:2.6.30:rc2:*:*:*:*:*:* | 2.6.30 rc2 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:2.6.30:rc3:*:*:*:*:*:* | 2.6.30 rc3 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:2.6.30:rc5:*:*:*:*:*:* | 2.6.30 rc5 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:2.6.30:rc6:*:*:*:*:*:* | 2.6.30 rc6 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:2.6.30:rc7-git6:*:*:*:*:*:* | 2.6.30 rc7-git6 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:2.6.30.1:*:*:*:*:*:*:* | 2.6.30.1 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:2.6.30.2:*:*:*:*:*:*:* | 2.6.30.2 | Vulnerable | Linux |
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions up to 2.6.30.4 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:2.6.30:*:*:*:*:*:*:* Versions 2.6.30 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:2.6.30:rc1:*:*:*:*:*:* Versions 2.6.30 rc1 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:2.6.30:rc2:*:*:*:*:*:* Versions 2.6.30 rc2 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:2.6.30:rc3:*:*:*:*:*:* Versions 2.6.30 rc3 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:2.6.30:rc5:*:*:*:*:*:* Versions 2.6.30 rc5 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:2.6.30:rc6:*:*:*:*:*:* Versions 2.6.30 rc6 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:2.6.30:rc7-git6:*:*:*:*:*:* Versions 2.6.30 rc7-git6 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:2.6.30.1:*:*:*:*:*:*:* Versions 2.6.30.1 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:2.6.30.2:*:*:*:*:*:*:* Versions 2.6.30.2 Vulnerable ·Linux
Remediation
Red Hat 1 advisory
- RHSA-2009:1540 Released 2009-11-03 · Red Hat rating Importantkernel-rt security, bug fix, and enhancement update
- MRG Realtime for RHEL 5 Server kernel-rt-2.6.24.7-137.el5rt, kernel-rt-debug-2.6.24.7-137.el5rt, kernel-rt-debug-devel-2.6.24.7-137.el5rt +6
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| MRG Realtime for RHEL 5 Server | Fixed | RHSA-2009:1540 |
Timeline
- 2026-10-02 Threatist record created from CVE-2009-2691
- 2026-10-03 Alias added: GHSA-274m-66j7-crv4
References
Patch 3
Other 6
- [linux-kernel] 20090623 [PATCH 0/1] mm_for_maps: simplify, use ptrace_may_access()
- https://bugzilla.redhat.com/show_bug.cgi?id=516171
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=00f89d218523b9bf6b522349c039d5ac80aa536d
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=704b836cbf19e885f8366bccb2e4b0474346c02d
- [oss-security] 20090811 CVE-2009-2691 kernel: /proc/$pid/maps visible during initial setuid ELF loading
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=13f0feafa6b8aead57a2a328e2fca6a5828bf286
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- TI-2013-01864 The perf_swevent_init function in kernel/events/core.c in the Linux kernel before 3.8.9… KEVCVSS 3.1HIGH 8.4
- TI-2021-05514 Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACE KEVCVSS 3.1HIGH 8.3
Sources
- CVE-2009-2691 · CVE Program
- CVE-2009-2691 · NVD
- FIRST EPSS
- GHSA-274m-66j7-crv4 · GitHub Advisory Database · CC BY 4.0
- CVE-2009-2691 · Red Hat security data · CC BY 4.0
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