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Fencer Intel
medium 5.0

CVE-2015-5276 json

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 b…

published 2015-11-17 10 y ago modified 2026-06-17 4 mo ago also EUVD-2015-5255

cvss
5.0
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
2.9%
EPSS 2.9% chance of exploitation in 30 days, percentile 87%
public exploits
0
none known

Summary

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.

Patch / fix

  • gnu gcc 4.9.4
  • mozilla-nss SLES for SAP 11 SP4, SLES 11 SP4, SLES 11 SP3-TERADATA +3 more 3.29.5-47.3.2
  • firefox-gcc5 SLES for SAP 11 SP4, SLES 11 SP4, SLES 11 SP3-TERADATA +2 more 5.3.1+r233831-7.1
  • MozillaFirefox SLES for SAP 11 SP4, SLES 11 SP4, SLES 11 SP3-TERADATA +3 more 52.2.0esr-72.5.2
  • firefox-libffi-gcc5 SLES for SAP 11 SP4, SLES 11 SP4, SLES 11 SP3-TERADATA +2 more 5.3.1+r233831-7.1
  • MozillaFirefox-branding-SLED SLES for SAP 11 SP4, SLES 11 SP4, SLES 11 SP3-TERADATA +2 more 52-24.3.44
  • gcc48 SLE Software Development Kit 11 SP4 4.8.5-4.2
  • gcc5 SLES for SAP 12 SP1, SLES for SAP 12, SLES 12 SP1 +5 more 5.3.1+r233831-9.1
  • libffi-gcc5 SLES for SAP 12 SP1, SLES for SAP 12, SLES 12 SP1 +4 more 5.3.1+r233831-9.1

suse advisories SUSE-SU-2017:2235-1SUSE-SU-2017:0379-1SUSE-SU-2016:0963-1SUSE-SU-2016:0908-2SUSE-SU-2015:1833-1

  • gcc5 openSUSE Tumbleweed 5.4.1+r240125-1.5

opensuse advisories openSUSE-SU-2024:10542-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2015-5276 updated cvss 3.3

gcc: Predictable randomness from std::random_device

  • Red Hat Enterprise Linux 6 cpp, gcc, libgcc, libgcj, libitm, gcc-c++, +14 more Red Hat Enterprise Linux 7 cpp, gcc, libgo, gcc-go, libgcc, libitm, +15 more
    affected: no fix planned “Will not fix”

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

2.94% chance of exploitation in the next 30 days, higher than 87% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:P/I:N/A:N

Classification

Weakness
  • CWE-200 Exposure of Sensitive Information to an Unauthorized Actor

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.