How severe is CVE-2018-20673?

CVE-2018-20673 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2018-20673 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (73rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-20673?

CVE-2018-20673 affects Gnu Binutils. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-20673?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2018-20673 published?

CVE-2018-20673 was published on 2019-01-04 and last updated on 2026-06-17.

CVE-2018-20673

CVE-2018-20673 is a medium-severity vulnerability in Gnu Binutils with a CVSS 3.x base score of 5.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-190.

Key facts

Severity: Medium (CVSS 3.x base score 5.5)
CVSS v2: 4.3
EPSS exploit prediction: 2% (73rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-190
Affected product: Gnu Binutils
Published: 2019-01-04
Last modified: 2026-06-17

Description

The demangle_template function in cplus-dem.c in GNU libiberty, as distributed in GNU Binutils 2.31.1, contains an integer overflow vulnerability (for "Create an array for saving the template argument values") that can trigger a heap-based buffer overflow, as demonstrated by nm.

Frequently asked questions

What is CVE-2018-20673?: The demangle_template function in cplus-dem.c in GNU libiberty, as distributed in GNU Binutils 2.31.1, contains an integer overflow vulnerability (for "Create an array for saving the template argument values") that can trigger a heap-based buffer overflow, as demonstrated by nm.
How severe is CVE-2018-20673?: CVE-2018-20673 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2018-20673 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (73rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-20673?: CVE-2018-20673 affects Gnu Binutils. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-20673?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2018-20673 published?: CVE-2018-20673 was published on 2019-01-04 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:gnu:binutils:2.31.1:*:*:*:*:*:*:*

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