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TI-2011-00880 Aliases CVE-2011-1021GHSA-42f2-xvqw-p5x2

drivers/acpi/debugfs.c in the Linux kernel before 3.0 allows local users to modify…

Priority LOW 19CWE-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
None · Partial · Partial
Fix status
Fixed

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

Summary

drivers/acpi/debugfs.c in the Linux kernel before 3.0 allows local users to modify arbitrary kernel memory locations by leveraging root privileges to write to the /sys/kernel/debug/acpi/custom_method file. NOTE: this vulnerability exists because of an incomplete fix for CVE-2010-4347.

Why it matters now

EPSS 0.00928 60th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed Red Hat: 1 advisory

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 · 5

CPEVersionsRoleVendor
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*up to 2.6.9VulnerableLinux
cpe:2.3:o:linux:linux_kernel:2.6.9:rc1:*:*:*:*:*:*2.6.9 rc1VulnerableLinux
cpe:2.3:o:linux:linux_kernel:2.6.9:rc2:*:*:*:*:*:*2.6.9 rc2VulnerableLinux
cpe:2.3:o:linux:linux_kernel:2.6.9:rc3:*:*:*:*:*:*2.6.9 rc3VulnerableLinux
cpe:2.3:o:linux:linux_kernel:2.6.9:rc4:*:*:*:*:*:*2.6.9 rc4VulnerableLinux
  • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions up to 2.6.9 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:2.6.9:rc1:*:*:*:*:*:* Versions 2.6.9 rc1 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:2.6.9:rc2:*:*:*:*:*:* Versions 2.6.9 rc2 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:2.6.9:rc3:*:*:*:*:*:* Versions 2.6.9 rc3 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:2.6.9:rc4:*:*:*:*:*:* Versions 2.6.9 rc4 Vulnerable ·Linux

Remediation

Red Hat 1 advisory

  • 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 MRG Realtime for RHEL 6 Server v.2Fixed RHSA-2011:1253
Not affected: 3 products
  • Red Hat Enterprise Linux 4
  • Red Hat Enterprise Linux 5
  • Red Hat Enterprise Linux 6

Timeline

  1. 2026-10-02 Threatist record created from CVE-2011-1021
  2. 2026-10-03 Alias added: GHSA-42f2-xvqw-p5x2

References

Exploit 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