CVE-2020-28163

Severity: medium (CVSS 6.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.8% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2023-04-16 · updated 2026-06-17
Weakness: CWE-476

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.

Affected products

Libdwarf Project Libdwarf: before 2020-12-01 — fixed in 2020-12-01

How to fix

Upgrade to a fixed version: Libdwarf Project Libdwarf 2020-12-01. Check the vendor advisory for mitigations.

References

http://web.archive.org/web/20190601140703/https://sourceforge.net/projects/libdwarf/
https://bugzilla.redhat.com/show_bug.cgi?id=2026000
https://github.com/davea42/libdwarf-code/commit/faf99408e3f9f706fc3809dd400e831f989778d3
https://www.prevanders.net/dwarfbug.html#DW202010-003
http://web.archive.org/web/20190601140703/https://sourceforge.net/projects/libdwarf/
https://bugzilla.redhat.com/show_bug.cgi?id=2026000
https://github.com/davea42/libdwarf-code/commit/faf99408e3f9f706fc3809dd400e831f989778d3
https://www.prevanders.net/dwarfbug.html#DW202010-003

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