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CVE-2011-1021

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

3.6 LowPublic exploit

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.

Exploit likelihood

0.93%Unchanged since Feb 4, 2022
90%50%10%1%

What each source reports

NVD Score used 3.6

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.

Record
CVE-2011-1021
CVSS 2.0
3.6 LowAV:L/AC:L/Au:N/C:N/I:P/A:P
Weakness
CWE-264
Updated
2026-11-02
CVE List No score

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.

Record
CVE-2011-1021
Updated
2026-11-02
EUVDEUVD-2011-1038 No score

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.

Record
EUVD-2011-1038
Updated
2026-11-03
GitHub AdvisoriesGHSA-42f2-xvqw-p5x2 No score

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

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.

Record
GHSA-42f2-xvqw-p5x2
Updated
2026-11-02
OSVUBUNTU-CVE-2011-1021 No score

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.

Record
UBUNTU-CVE-2011-1021
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
kernel-rt
Red Hat:enterprise_mrg:2:server:el6
From an advisory covering 33 CVEs
 before 0:2.6.33.9-rt31.75.el6rt
0:2.6.33.9-rt31.75.el6rt
kernel-rt-debug
Red Hat:enterprise_mrg:2:server:el6
From an advisory covering 33 CVEs
 before 0:2.6.33.9-rt31.75.el6rt
0:2.6.33.9-rt31.75.el6rt
kernel-rt-debug-debuginfo
Red Hat:enterprise_mrg:2:server:el6
From an advisory covering 33 CVEs
 before 0:2.6.33.9-rt31.75.el6rt
0:2.6.33.9-rt31.75.el6rt
kernel-rt-debug-devel
Red Hat:enterprise_mrg:2:server:el6
From an advisory covering 33 CVEs
 before 0:2.6.33.9-rt31.75.el6rt
0:2.6.33.9-rt31.75.el6rt
kernel-rt-debuginfo
Red Hat:enterprise_mrg:2:server:el6
From an advisory covering 33 CVEs
 before 0:2.6.33.9-rt31.75.el6rt
0:2.6.33.9-rt31.75.el6rt
kernel-rt-debuginfo-common-x86_64
Red Hat:enterprise_mrg:2:server:el6
From an advisory covering 33 CVEs
 before 0:2.6.33.9-rt31.75.el6rt
0:2.6.33.9-rt31.75.el6rt
kernel-rt-devel
Red Hat:enterprise_mrg:2:server:el6
From an advisory covering 33 CVEs
 before 0:2.6.33.9-rt31.75.el6rt
0:2.6.33.9-rt31.75.el6rt
kernel-rt-doc
Red Hat:enterprise_mrg:2:server:el6
From an advisory covering 33 CVEs
 before 0:2.6.33.9-rt31.75.el6rt
0:2.6.33.9-rt31.75.el6rt
kernel-rt-firmware
Red Hat:enterprise_mrg:2:server:el6
From an advisory covering 33 CVEs
 before 0:2.6.33.9-rt31.75.el6rt
0:2.6.33.9-rt31.75.el6rt
kernel-rt-trace
Red Hat:enterprise_mrg:2:server:el6
From an advisory covering 33 CVEs
 before 0:2.6.33.9-rt31.75.el6rt
0:2.6.33.9-rt31.75.el6rt
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Affected packages
PackageAffectedFixed
kernel-rt-trace-debuginfo
Red Hat:enterprise_mrg:2:server:el6
From an advisory covering 33 CVEs
 before 0:2.6.33.9-rt31.75.el6rt
0:2.6.33.9-rt31.75.el6rt
kernel-rt-trace-devel
Red Hat:enterprise_mrg:2:server:el6
From an advisory covering 33 CVEs
 before 0:2.6.33.9-rt31.75.el6rt
0:2.6.33.9-rt31.75.el6rt
kernel-rt-vanilla
Red Hat:enterprise_mrg:2:server:el6
From an advisory covering 33 CVEs
 before 0:2.6.33.9-rt31.75.el6rt
0:2.6.33.9-rt31.75.el6rt
kernel-rt-vanilla-debuginfo
Red Hat:enterprise_mrg:2:server:el6
From an advisory covering 33 CVEs
 before 0:2.6.33.9-rt31.75.el6rt
0:2.6.33.9-rt31.75.el6rt
kernel-rt-vanilla-devel
Red Hat:enterprise_mrg:2:server:el6
From an advisory covering 33 CVEs
 before 0:2.6.33.9-rt31.75.el6rt
0:2.6.33.9-rt31.75.el6rt

Public exploits

Links only. Every CVE stores no exploit code.

Public exploits
SourceLinkDate
Exploit-DBLinux Kernel < 2.6.37-rc2 - 'ACPI custom_method' Local Privilege Escalation2010-12-18

History

History
RecordedChangedSources
affected, facts
affected
aliasesEUVD
first indexedCVE List, Exploit-DB, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2011-1021 is a low vulnerability (CVSS 3.6) in Linux Kernel, published June 21, 2012. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 0.93%, the 60th percentile. No source names a fixed version.

References

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