CVE-2018-20657
CVSS v3
7.5
HIGH
EPSS Score
4.0 %
exploit probability, as of 2026-09-25
CISA KEV
No
known exploited
Exploitation
—
SSVC status
Description
The demangle_template function in cplus-dem.c in GNU libiberty, as distributed in GNU Binutils 2.31.1, has a memory leak via a crafted string, leading to a denial of service (memory consumption), as demonstrated by cxxfilt, a related issue to CVE-2018-12698.
Technical details
- Published
- 2019-01-02
Frequently asked questions
What is CVE-2018-20657?
The demangle_template function in cplus-dem.c in GNU libiberty, as distributed in GNU Binutils 2.31.1, has a memory leak via a crafted string, leading to a denial of service (memory consumption), as demonstrated by cxxfilt, a related issue to CVE-2018-12698.
Is CVE-2018-20657 actively exploited?
Active exploitation of CVE-2018-20657 has not been confirmed. Its EPSS score was 4.0% on 2026-09-25, the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2018-20657?
CVE-2018-20657 has a CVSS v3 base score of 7.5 (HIGH severity).
Is CVE-2018-20657 affecting your environment?
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