CVE-2011-3149

CVE-2011-3149 is a low-severity vulnerability in Linux-pam with a CVSS 2.0 base score of 2.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-119.

Key facts

Description

The _expand_arg function in the pam_env module (modules/pam_env/pam_env.c) in Linux-PAM (aka pam) before 1.1.5 does not properly handle when environment variable expansion can overflow, which allows local users to cause a denial of service (CPU consumption).

Frequently asked questions

What is CVE-2011-3149?
The _expand_arg function in the pam_env module (modules/pam_env/pam_env.c) in Linux-PAM (aka pam) before 1.1.5 does not properly handle when environment variable expansion can overflow, which allows local users to cause a denial of service (CPU consumption).
How severe is CVE-2011-3149?
CVE-2011-3149 has a CVSS 2.0 base score of 2.1, rated low severity.
Is CVE-2011-3149 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (41st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2011-3149?
CVE-2011-3149 primarily affects Linux-pam. In total, 26 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2011-3149?
Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2011-3149 published?
CVE-2011-3149 was published on 2012-07-22 and last updated on 2026-06-16.

References

Affected products (26)

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