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TI-2011-02187 Aliases CVE-2011-2495GHSA-qfq8-33vr-83jg

fs/proc/base.c in the Linux kernel before 2.6.39.4 does not properly restrict access to…

Priority LOW 12CWE-264Published · Updated

Key facts

Attack vector
Local
Privileges required
None
User interaction
— Not recorded in CVSS 2.0
Attack complexity
Low
Impact type
Security bypass
Confidentiality · integrity · availability
Partial · None · None
Fix status
Partial Red Hat: 5 fixed, 1 without a fix

Attack profile from CVSS 2.0 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-264.

Summary

fs/proc/base.c in the Linux kernel before 2.6.39.4 does not properly restrict access to /proc/#####/io files, which allows local users to obtain sensitive I/O statistics by polling a file, as demonstrated by discovering the length of another user's password.

Why it matters now

EPSS 0.00483 41st percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Partial Red Hat: 4 advisoriesRed Hat: 5 fixed, 1 without a fix

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 11

CPEVersionsRoleVendor
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*up to 2.6.39.3VulnerableLinux
cpe:2.3:o:linux:linux_kernel:2.6.39:*:*:*:*:*:*:*2.6.39VulnerableLinux
cpe:2.3:o:linux:linux_kernel:2.6.39:rc1:*:*:*:*:*:*2.6.39 rc1VulnerableLinux
cpe:2.3:o:linux:linux_kernel:2.6.39:rc2:*:*:*:*:*:*2.6.39 rc2VulnerableLinux
cpe:2.3:o:linux:linux_kernel:2.6.39:rc3:*:*:*:*:*:*2.6.39 rc3VulnerableLinux
cpe:2.3:o:linux:linux_kernel:2.6.39:rc4:*:*:*:*:*:*2.6.39 rc4VulnerableLinux
cpe:2.3:o:linux:linux_kernel:2.6.39:rc5:*:*:*:*:*:*2.6.39 rc5VulnerableLinux
cpe:2.3:o:linux:linux_kernel:2.6.39:rc6:*:*:*:*:*:*2.6.39 rc6VulnerableLinux
cpe:2.3:o:linux:linux_kernel:2.6.39:rc7:*:*:*:*:*:*2.6.39 rc7VulnerableLinux
cpe:2.3:o:linux:linux_kernel:2.6.39.1:*:*:*:*:*:*:*2.6.39.1VulnerableLinux
  • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions up to 2.6.39.3 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:2.6.39:*:*:*:*:*:*:* Versions 2.6.39 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:2.6.39:rc1:*:*:*:*:*:* Versions 2.6.39 rc1 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:2.6.39:rc2:*:*:*:*:*:* Versions 2.6.39 rc2 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:2.6.39:rc3:*:*:*:*:*:* Versions 2.6.39 rc3 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:2.6.39:rc4:*:*:*:*:*:* Versions 2.6.39 rc4 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:2.6.39:rc5:*:*:*:*:*:* Versions 2.6.39 rc5 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:2.6.39:rc6:*:*:*:*:*:* Versions 2.6.39 rc6 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:2.6.39:rc7:*:*:*:*:*:* Versions 2.6.39 rc7 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:2.6.39.1:*:*:*:*:*:*:* Versions 2.6.39.1 Vulnerable ·Linux
Show 1 more CPE
CPEVersionsRoleVendor
cpe:2.3:o:linux:linux_kernel:2.6.39.2:*:*:*:*:*:*:*2.6.39.2VulnerableLinux
  • cpe:2.3:o:linux:linux_kernel:2.6.39.2:*:*:*:*:*:*:* Versions 2.6.39.2 Vulnerable ·Linux

Remediation

Red Hat 4 advisories

  • RHSA-2011:1813 Released 2011-12-13 · Red Hat rating Important
    kernel security and bug fix update
    • Red Hat Enterprise Linux EUS (v. 5.6 server) kernel-2.6.18-238.31.1.el5, kernel-2.6.18-238.31.1.el5.ia64, kernel-PAE-2.6.18-238.31.1.el5 +14
  • RHSA-2011:1253 Released 2011-09-12 · Red Hat rating Important
    kernel-rt security and bug fix update
    • Red Hat MRG Realtime for RHEL 6 Server v.2 kernel-rt-2.6.33.9-rt31.75.el6rt, kernel-rt-debug-2.6.33.9-rt31.75.el6rt, kernel-rt-debug-devel-2.6.33.9-rt31.75.el6rt +7
  • RHSA-2011:1212 Released 2011-09-06 · Red Hat rating Important
    kernel security and bug fix update
    • Red Hat Enterprise Linux (v. 5 server) kernel-2.6.18-274.3.1.el5, kernel-2.6.18-274.3.1.el5.ia64, kernel-PAE-2.6.18-274.3.1.el5 +14
    • Red Hat Enterprise Linux Desktop (v. 5 client) kernel-2.6.18-274.3.1.el5, kernel-PAE-2.6.18-274.3.1.el5, kernel-PAE-devel-2.6.18-274.3.1.el5 +6
Show 1 more Red Hat advisories
  • RHSA-2011:1189 Released 2011-08-23 · Red Hat rating Important
    kernel security, bug fix, and enhancement update
    • Red Hat Enterprise Linux Server (v. 6) kernel-2.6.32-131.12.1.el6, kernel-bootwrapper-2.6.32-131.12.1.el6, kernel-debug-2.6.32-131.12.1.el6 +8

Vendor assessments

Red Hat

Red Hat rating: Low. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux 4AffectedNo fix planned: Will not fix
Red Hat Enterprise Linux (v. 5 server)Fixed RHSA-2011:1212
Red Hat Enterprise Linux Desktop (v. 5 client)Fixed RHSA-2011:1212
Red Hat Enterprise Linux EUS (v. 5.6 server)Fixed RHSA-2011:1813
Red Hat Enterprise Linux Server (v. 6)Fixed RHSA-2011:1189
Red Hat MRG Realtime for RHEL 6 Server v.2Fixed RHSA-2011:1253

Timeline

  1. 2026-10-02 Threatist record created from CVE-2011-2495
  2. 2026-10-03 Alias added: GHSA-qfq8-33vr-83jg

References

Exploit 1

Advisory 1

Other 4

  • TI-2025-26358 tls: fix handling of zero-length records on the rx_list KEVCVSS 3.1CRITICAL 9.8
  • TI-2026-38352 netfilter: bridge: make ebt_snat ARP rewrite writable KEVCVSS 3.1HIGH 8.8
  • TI-2013-05264 The (1) get_user and (2) put_user API functions in the Linux kernel before 3.5.5 on the… KEVCVSS 3.1HIGH 8.8
  • TI-2022-00125 Integer overflow in kernel KEVCVSS 3.1HIGH 8.4
  • 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
See all 15278 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences