CVE & CISA-KEV Catalog

CVE-2017-11671

MEDIUM
4.0
CVSS v3
NVD

Description

Under certain circumstances, the ix86_expand_builtin function in i386.c in GNU Compiler Collection (GCC) version 4.6, 4.7, 4.8, 4.9, 5 before 5.5, and 6 before 6.4 will generate instruction sequences that clobber the status flag of the RDRAND and RDSEED intrinsics before it can be read, potentially causing failures of these instructions to go unreported. This could potentially lead to less randomness in random number generation.

CWE-338

How to fix

Remediation Available
g++-5Ubuntu
Fixed in:5.4.0-6ubuntu1~16.04.12+esm2USN-5770-1
gcc-5Ubuntu
Fixed in:5.4.0-6ubuntu1~16.04.12+esm2USN-5770-1
gccgo-5Ubuntu
Fixed in:5.4.0-6ubuntu1~16.04.12+esm2USN-5770-1
gccgo-6Ubuntu
Fixed in:6.0.1-0ubuntu1+esm1USN-5770-1
gcj-5Ubuntu
Fixed in:5.4.0-6ubuntu1~16.04.12+esm2USN-5770-1
gcj-5-jdkUbuntu
Fixed in:5.4.0-6ubuntu1~16.04.12+esm2USN-5770-1
gcj-5-jre-headlessUbuntu
Fixed in:5.4.0-6ubuntu1~16.04.12+esm2USN-5770-1
gdc-5Ubuntu
Fixed in:5.4.0-6ubuntu1~16.04.12+esm2USN-5770-1
gfortran-5Ubuntu
Fixed in:5.4.0-6ubuntu1~16.04.12+esm2USN-5770-1
gnat-5Ubuntu
Fixed in:5.4.0-6ubuntu1~16.04.12+esm2USN-5770-1

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorLocal
Attack ComplexityLow
Privileges RequiredNone
User InteractionNone
ScopeUnchanged

Impact

ConfidentialityLow
IntegrityNone
AvailabilityNone

CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Exploit Intelligence

0.44%probability of exploitation in 30 days
36thpercentile

Low risk: more likely to be exploited than 36% of all known CVEs.

References

Vendor Advisory1
Third-Party Advisory2
Mailing List1
Other references1

Related Vulnerabilities

Other CWE-338 vulnerabilities, ordered by exploit likelihood. View all

CVESeverityCVSSEPSSExploitedFix
CVE-2008-0166High7.571%-Fix
CVE-2009-2367Critical9.823%--
CVE-2024-29868Critical9.16.0%--
CVE-2024-31497Medium5.95.8%-Fix
CVE-2021-43799High8.65.4%-Fix
CVE-2008-3280Medium5.94.0%--
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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-05-13.