How severe is CVE-2020-28163?

CVE-2020-28163 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2020-28163 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (52nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-28163?

CVE-2020-28163 affects Libdwarf Project Libdwarf. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-28163?

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

When was CVE-2020-28163 published?

CVE-2020-28163 was published on 2023-04-16 and last updated on 2026-06-17.

CVE-2020-28163

CVE-2020-28163 is a medium-severity vulnerability in Libdwarf Project Libdwarf with a CVSS 3.x base score of 6.5. 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: Medium (CVSS 3.x base score 6.5)
EPSS exploit prediction: 1% (52nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-476
Affected product: Libdwarf Project Libdwarf
Published: 2023-04-16
Last modified: 2026-06-17

Description

libdwarf before 20201201 allows a dwarf_print_lines.c NULL pointer dereference and application crash via a DWARF5 line-table header that has an invalid FORM for a pathname.

Frequently asked questions

What is CVE-2020-28163?: libdwarf before 20201201 allows a dwarf_print_lines.c NULL pointer dereference and application crash via a DWARF5 line-table header that has an invalid FORM for a pathname.
How severe is CVE-2020-28163?: CVE-2020-28163 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2020-28163 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (52nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-28163?: CVE-2020-28163 affects Libdwarf Project Libdwarf. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-28163?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2020-28163 published?: CVE-2020-28163 was published on 2023-04-16 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:libdwarf_project:libdwarf:*:*:*:*:*:*:*:*

More vulnerabilities in Libdwarf Project Libdwarf

CVE-2017-9055 — Critical (CVSS 9.8): An issue, also known as DW201703-001, was discovered in libdwarf 2017-03-21. In dwarf_formsdata() a few data types were…
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CVE-2017-9052 — Critical (CVSS 9.8): An issue, also known as DW201703-006, was discovered in libdwarf 2017-03-21. A heap-based buffer over-read in…
CVE-2016-9558 — Critical (CVSS 9.8): (1) libdwarf/dwarf_leb.c and (2) dwarfdump/print_frames.c in libdwarf before 20161124 allow remote attackers to have…
CVE-2017-9053 — Critical (CVSS 9.1): An issue, also known as DW201703-005, was discovered in libdwarf 2017-03-21. A heap-based buffer over-read in…
CVE-2016-9480 — Critical (CVSS 9.1): libdwarf 2016-10-21 allows context-dependent attackers to obtain sensitive information or cause a denial of service by…

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