CVE-2011-2495

2.1 LOW 0.5% exploit odds Fix listed

What it is

fs/proc/base.c in the Linux kernel before 2.6.39.4 does not properly restrict access to /proc/#####/io files, which allows local users to obtain sensitive I/O statistics by polling a file, as demonstrated by discovering the length of another user's password.

At a glance

Exploitability: Can be exploited locally on the machine without logging in. Limited direct impact.
Exploit odds: 0.5% chance of exploitation in the next 30 days (EPSS).
Fix: A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

2012-06-13 10:24 UTC PublishedDisclosed publicly on CVE.org and NVD
2026-06-16 23:31 UTC Last updatedMost recent change to the record

Why it ranks here

Exploited in the wild: no, CISA does not list it.
Exploit odds: 0.5% in the next 30 days (EPSS).
Severity: 2.1 LOW (CVSS).
Fix: a patch or advisory is linked.

Details

Published: 2012-06-13 10:24 UTC
Last modified: 2026-06-16 23:31 UTC
Exploit probability: 0.5% · EPSS, next 30 days
Weakness: CWE-264
Record status: Modified

Affected

Linux Kernel ≤ 2.6.39.3
Linux Kernel 2.6.39
Linux Kernel 2.6.39.1
Linux Kernel 2.6.39.2

Attack profile CVSS 2.0 · 2.1

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

Raw vector

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

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-2011-2495.md and follow it. Check whether this project is affected by CVE-2011-2495. 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