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CVE-2015-5276

16
FAUCET Score

CVE-2015-5276 describes a vulnerability in the std::random_device class within libstdc++ of GNU GCC versions prior to 4.9.4. This flaw allows for easier prediction of random values due to improper handling of short reads from blocking sources. With a CVSS score of 5.0, this vulnerability has a network attack vector and low attack complexity, potentially leading to information disclosure (C:P) without impacting integrity or availability. There is no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 4.9.4CPE matchmatch criteria
cpe:2.3:a:gnu:gcc:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

5.0MEDIUM

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

Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
2.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
2.94%
Probability of exploitation in next 30 days
EPSS Percentile
85.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0294 is in the 80th percentile among its peer group of 23,723 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Patches (2)

redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: gcc
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: gcc

Vendor Advisories (1)

redhatCVE-2015-5276Low

gcc: Predictable randomness from std::random_device

Feb 20, 2015

References

lists.opensuse.org / opensuse-updates/2015-11/msg00054.html
Mailing ListThird Party Advisory
lists.opensuse.org / opensuse-updates/2016-04/msg00052.html
Mailing ListThird Party Advisory
bugzilla.redhat.com / show_bug.cgi
Issue TrackingThird Party Advisory
gcc.gnu.org / bugzilla/show_bug.cgi
Issue TrackingVendor Advisory
securitytracker.com / id/1034375
Third Party AdvisoryVDB Entry