How severe is CVE-2019-20909?

CVE-2019-20909 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2019-20909 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-2019-20909?

CVE-2019-20909 affects Gnu Libredwg. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2019-20909?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2019-20909 published?

CVE-2019-20909 was published on 2020-07-16 and last updated on 2026-06-17.

CVE-2019-20909

CVE-2019-20909 is a high-severity vulnerability in Gnu Libredwg with a CVSS 3.x base score of 7.5. 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-476.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 2% (73rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-476
Affected product: Gnu Libredwg
Published: 2020-07-16
Last modified: 2026-06-17

Description

An issue was discovered in GNU LibreDWG through 0.9.3. There is a NULL pointer dereference in the function dwg_encode_LWPOLYLINE in dwg.spec.

Frequently asked questions

What is CVE-2019-20909?: An issue was discovered in GNU LibreDWG through 0.9.3. There is a NULL pointer dereference in the function dwg_encode_LWPOLYLINE in dwg.spec.
How severe is CVE-2019-20909?: CVE-2019-20909 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2019-20909 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-2019-20909?: CVE-2019-20909 affects Gnu Libredwg. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2019-20909?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2019-20909 published?: CVE-2019-20909 was published on 2020-07-16 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:gnu:libredwg:*:*:*:*:*:*:*:*

More vulnerabilities in Gnu Libredwg

CVE-2022-35164 — Critical (CVSS 9.8): LibreDWG v0.12.4.4608 & commit f2dea29 was discovered to contain a heap use-after-free via bit_copy_chain.
CVE-2021-28237 — Critical (CVSS 9.8): LibreDWG v0.12.3 was discovered to contain a heap-buffer overflow via decode_preR13.
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CVE-2019-9775 — Critical (CVSS 9.1): An issue was discovered in GNU LibreDWG 0.7 and 0.7.1645. There is an out-of-bounds read in the function…
CVE-2019-9774 — Critical (CVSS 9.1): An issue was discovered in GNU LibreDWG 0.7 and 0.7.1645. There is an out-of-bounds read in the function bit_read_B at…
CVE-2023-36274 — High (CVSS 8.8): LibreDWG v0.11 to v0.12.5 was discovered to contain a heap buffer overflow via the function bit_write_TF at bits.c.

All CVEs affecting Gnu Libredwg →

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Browse all CWE-476 (NULL Pointer Dereference) vulnerabilities →