What’s Vulnerable › Vulnerabilities

CVE-2026-116732: libdwarf through 2.3.3 Heap Out-of-Bounds Read via dwarf_debug_addr_table

• Severity: medium (CVSS 4.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-26 · updated 2026-10-31
• Weakness: CWE-125

Description

libdwarf through 2.3.3 contains a heap out-of-bounds read vulnerability in dwarf_debug_addr_table() that omits the table starting offset when validating .debug_addr unit length. Attackers can supply a crafted object file with a non-zero offset table, causing dwarf_debug_addr_by_index() to read past the heap buffer, disclosing adjacent heap bytes or crashing consumers.

Affected products

• davea42 libdwarf: through 2.3.3

References

• https://github.com/davea42/libdwarf-code
• https://github.com/davea42/libdwarf-code/blob/v2.3.3/src/lib/libdwarf/dwarf_debugaddr.c#L175-L216
• https://github.com/davea42/libdwarf-code/commit/71f04013ddc2a3c88b9e25a4162ee2824741b593
• https://github.com/davea42/libdwarf-code/issues/336
• https://hackmd.io/@haindpwn/libdwarf-debug-addr-table-section-offset-oob-read
• https://www.vulncheck.com/advisories/libdwarf-through-2.3.3-heap-out-of-bounds-read-via-dwarf-debug-addr-table

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