What’s Vulnerable › Vulnerabilities

CVE-2015-5276

• Severity: medium (CVSS 5.0 v2.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.9% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2015-11-17 · updated 2026-06-17
• Weakness: CWE-200

Description

The std::random_device class in libstdc++ in the GNU Compiler Collection (aka GCC) before 4.9.4 does not properly handle short reads from blocking sources, which makes it easier for context-dependent attackers to predict the random values via unspecified vectors.

Affected products

• GNU GCC: before 4.9.4 — fixed in 4.9.4

How to fix

Upgrade to a fixed version: GNU GCC 4.9.4. Check the vendor advisory for mitigations.

References

• http://lists.opensuse.org/opensuse-updates/2015-11/msg00054.html
• http://lists.opensuse.org/opensuse-updates/2016-04/msg00052.html
• http://www.securitytracker.com/id/1034375
• https://bugzilla.redhat.com/show_bug.cgi?id=1262846
• https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65142
• http://lists.opensuse.org/opensuse-updates/2015-11/msg00054.html
• http://lists.opensuse.org/opensuse-updates/2016-04/msg00052.html
• http://www.securitytracker.com/id/1034375
• https://bugzilla.redhat.com/show_bug.cgi?id=1262846
• https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65142

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