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TI-2012-00055 Aliases CVE-2012-0056GHSA-h6ww-x4xv-2vj2

The mem_write function in the Linux kernel before 3.2.2, when ASLR is disabled, does not…

Priority MEDIUM 43CWE-264Published · Updated

Key facts

Attack vector
Local
Privileges required
None
User interaction
— Not recorded in CVSS 2.0
Attack complexity
Medium
Impact type
Security bypass
Confidentiality · integrity · availability
Complete · Complete · Complete
Fix status
Partial Red Hat: 9 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

The mem_write function in the Linux kernel before 3.2.2, when ASLR is disabled, does not properly check permissions when writing to /proc/<pid>/mem, which allows local users to gain privileges by modifying process memory, as demonstrated by Mempodipper.

Why it matters now

EPSS 0.1084 95th percentileScored 2026-11-07
Fix Partial Red Hat: 2 advisoriesRed Hat: 9 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 · 1

CPEVersionsRoleVendor
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*2.6.39 to before 3.0.18; 3.1 to before 3.2.2VulnerableLinux
  • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions 2.6.39 to before 3.0.18; 3.1 to before 3.2.2 Vulnerable ·Linux

Remediation

Red Hat 2 advisories

  • RHSA-2012:0061 Released 2012-01-24 · Red Hat rating Important
    kernel-rt security update
    • Red Hat MRG Realtime for RHEL 6 Server v.2 kernel-rt-3.0.9-rt26.46.el6rt, kernel-rt-debug-3.0.9-rt26.46.el6rt, kernel-rt-debug-devel-3.0.9-rt26.46.el6rt +7
  • RHSA-2012:0052 Released 2012-01-23 · Red Hat rating Important
    kernel security and bug fix update
    • Red Hat Enterprise Linux Desktop (v. 6) kernel-2.6.32-220.4.1.el6, kernel-debug-2.6.32-220.4.1.el6, kernel-debug-devel-2.6.32-220.4.1.el6 +5
    • Red Hat Enterprise Linux Desktop Optional (v. 6) kernel-2.6.32-220.4.1.el6, python-perf-2.6.32-220.4.1.el6
    • Red Hat Enterprise Linux HPC Node (v. 6) kernel-2.6.32-220.4.1.el6, kernel-debug-2.6.32-220.4.1.el6, kernel-debug-devel-2.6.32-220.4.1.el6 +5
    • Red Hat Enterprise Linux HPC Node Optional (v. 6) kernel-2.6.32-220.4.1.el6, python-perf-2.6.32-220.4.1.el6
    • Red Hat Enterprise Linux Server (v. 6) kernel-2.6.32-220.4.1.el6, kernel-bootwrapper-2.6.32-220.4.1.el6, kernel-debug-2.6.32-220.4.1.el6 +8
    • Red Hat Enterprise Linux Server Optional (v. 6) kernel-2.6.32-220.4.1.el6, python-perf-2.6.32-220.4.1.el6
    • Red Hat Enterprise Linux Workstation (v. 6) kernel-2.6.32-220.4.1.el6, kernel-debug-2.6.32-220.4.1.el6, kernel-debug-devel-2.6.32-220.4.1.el6 +5
    • Red Hat Enterprise Linux Workstation Optional (v. 6) kernel-2.6.32-220.4.1.el6, python-perf-2.6.32-220.4.1.el6

Vendor assessments

Red Hat

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

ProductStatusPlan or fix
Red Hat Enterprise Linux 5AffectedNo fix planned: Will not fix
Red Hat Enterprise Linux Desktop (v. 6)Fixed RHSA-2012:0052
Red Hat Enterprise Linux Desktop Optional (v. 6)Fixed RHSA-2012:0052
Red Hat Enterprise Linux HPC Node (v. 6)Fixed RHSA-2012:0052
Red Hat Enterprise Linux HPC Node Optional (v. 6)Fixed RHSA-2012:0052
Red Hat Enterprise Linux Server (v. 6)Fixed RHSA-2012:0052
Red Hat Enterprise Linux Server Optional (v. 6)Fixed RHSA-2012:0052
Red Hat Enterprise Linux Workstation (v. 6)Fixed RHSA-2012:0052
Red Hat Enterprise Linux Workstation Optional (v. 6)Fixed RHSA-2012:0052
Red Hat MRG Realtime for RHEL 6 Server v.2Fixed RHSA-2012:0061
Not affected: 1 product
  • Red Hat Enterprise Linux 4

Timeline

  1. 2026-10-02 Threatist record created from CVE-2012-0056
  2. 2026-10-03 Alias added: GHSA-h6ww-x4xv-2vj2

References

Advisory 12

  • 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