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TI-2011-00879 Aliases CVE-2011-1020GHSA-5vjr-66w2-fxv8

The proc filesystem implementation in the Linux kernel 2.6.37 and earlier does not…

Priority LOW 23CWE-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 · Partial · Partial
Fix status
Partial Red Hat: 12 fixed, 2 without a fix

Attack profile from CVSS 2.0 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-200.

Summary

The proc filesystem implementation in the Linux kernel 2.6.37 and earlier does not restrict access to the /proc directory tree of a process after this process performs an exec of a setuid program, which allows local users to obtain sensitive information or cause a denial of service via open, lseek, read, and write system calls.

Why it matters now

EPSS 0.00923 60th percentileScored 2026-11-07
Public exploit Yes 3 exploit referencesTagged by NVD
Fix Partial Red Hat: 4 advisoriesRed Hat: 12 fixed, 2 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 · 1

CPEVersionsRoleVendor
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*before 2.6.37VulnerableLinux
  • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions before 2.6.37 Vulnerable ·Linux

Remediation

Red Hat 4 advisories

  • RHSA-2012:0116 Released 2012-02-15 · Red Hat rating Moderate
    kernel security and bug fix update
    • Red Hat Enterprise Linux Server EUS (v. 6.1) kernel-2.6.32-131.25.1.el6, kernel-bootwrapper-2.6.32-131.25.1.el6, kernel-debug-2.6.32-131.25.1.el6 +8
  • RHSA-2012:0007 Released 2012-01-10 · Red Hat rating Important
    kernel security, bug fix, and enhancement update
    • Red Hat Enterprise Linux (v. 5 server) kernel-2.6.18-274.17.1.el5, kernel-2.6.18-274.17.1.el5.ia64, kernel-PAE-2.6.18-274.17.1.el5 +18
    • Red Hat Enterprise Linux Desktop (v. 5 client) kernel-2.6.18-274.17.1.el5, kernel-PAE-2.6.18-274.17.1.el5, kernel-PAE-devel-2.6.18-274.17.1.el5 +8
  • RHSA-2011:1530 Released 2011-12-05 · Red Hat rating Moderate
    Red Hat Enterprise Linux 6 kernel security, bug fix and enhancement update
    • Red Hat Enterprise Linux Desktop (v. 6) kernel-2.6.32-220.el6, kernel-debug-2.6.32-220.el6, kernel-debug-devel-2.6.32-220.el6 +5
    • Red Hat Enterprise Linux Desktop Optional (v. 6) kernel-2.6.32-220.el6, python-perf-2.6.32-220.el6
    • Red Hat Enterprise Linux HPC Node (v. 6) kernel-2.6.32-220.el6, kernel-debug-2.6.32-220.el6, kernel-debug-devel-2.6.32-220.el6 +5
    • Red Hat Enterprise Linux HPC Node Optional (v. 6) kernel-2.6.32-220.el6, python-perf-2.6.32-220.el6
    • Red Hat Enterprise Linux Server (v. 6) kernel-2.6.32-220.el6, kernel-bootwrapper-2.6.32-220.el6, kernel-debug-2.6.32-220.el6 +8
    • Red Hat Enterprise Linux Server Optional (v. 6) kernel-2.6.32-220.el6, python-perf-2.6.32-220.el6
    • Red Hat Enterprise Linux Workstation (v. 6) kernel-2.6.32-220.el6, kernel-debug-2.6.32-220.el6, kernel-debug-devel-2.6.32-220.el6 +5
    • Red Hat Enterprise Linux Workstation Optional (v. 6) kernel-2.6.32-220.el6, python-perf-2.6.32-220.el6
Show 1 more Red Hat advisories
  • 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

Vendor assessments

Red Hat

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

ProductStatusPlan or fix
Red Hat Enterprise Linux 4AffectedNo fix yet
Red Hat Enterprise MRG 1AffectedNo fix yet
Red Hat Enterprise Linux (v. 5 server)Fixed RHSA-2012:0007
Red Hat Enterprise Linux Desktop (v. 5 client)Fixed RHSA-2012:0007
Red Hat Enterprise Linux Desktop (v. 6)Fixed RHSA-2011:1530
Red Hat Enterprise Linux Desktop Optional (v. 6)Fixed RHSA-2011:1530
Red Hat Enterprise Linux HPC Node (v. 6)Fixed RHSA-2011:1530
Red Hat Enterprise Linux HPC Node Optional (v. 6)Fixed RHSA-2011:1530
Red Hat Enterprise Linux Server (v. 6)Fixed RHSA-2011:1530
Red Hat Enterprise Linux Server EUS (v. 6.1)Fixed RHSA-2012:0116
Red Hat Enterprise Linux Server Optional (v. 6)Fixed RHSA-2011:1530
Red Hat Enterprise Linux Workstation (v. 6)Fixed RHSA-2011:1530
Red Hat Enterprise Linux Workstation Optional (v. 6)Fixed RHSA-2011:1530
Red Hat MRG Realtime for RHEL 6 Server v.2Fixed RHSA-2011:1253

Timeline

  1. 2026-10-02 Threatist record created from CVE-2011-1020
  2. 2026-10-03 Alias added: GHSA-5vjr-66w2-fxv8

References

Exploit 3

Advisory 9

  • 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