CVE-2011-1021

3.6 LOW 0.9% exploit odds Fix listed

What it is

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.

At a glance

Exploitability: Can be exploited locally on the machine without logging in. Limited direct impact.
Exploit odds: 0.9% chance of exploitation in the next 30 days (EPSS).
Fix: A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

2012-06-21 23:55 UTC PublishedDisclosed publicly on CVE.org and NVD
2026-06-16 23:28 UTC Last updatedMost recent change to the record

Why it ranks here

Exploited in the wild: no, CISA does not list it.
Exploit odds: 0.9% in the next 30 days (EPSS).
Severity: 3.6 LOW (CVSS).
Fix: a patch or advisory is linked.

Details

Published: 2012-06-21 23:55 UTC
Last modified: 2026-06-16 23:28 UTC
Exploit probability: 0.9% · EPSS, next 30 days
Weakness: CWE-264
Record status: Modified

Affected

Linux Kernel ≤ 2.6.9
Linux Kernel 2.6.9

Attack profile CVSS 2.0 · 3.6

Attack vector: Local
Complexity: Low
Authentication: None
Confidentiality: None
Integrity: Partial
Availability: Partial

Raw vector

AV:L/AC:L/Au:N/C:N/I:P/A:P

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2011-1021.md and follow it. Check whether this project is affected by CVE-2011-1021. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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Fix and advisories

References

NVD record · CVE.org record