Out-of-bounds Read in Davea42 Libdwarf
CVE-2026-116732
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.
Vulnerability class: Buffer Overflow
Published .
CVSS v3 metric
CVSS v3 base score 4.4 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:L.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/davea42/libdwarf-code/issues/336 (issue-tracking)
- github.com/davea42/libdwarf-code (product)
- github.com/davea42/libdwarf-code/commit/71f04013ddc2a3c88b9e25a4162ee2824741b593 (patch)
- github.com/davea42/libdwarf-code/blob/v2.3.3/src/lib/libdwarf/dwarf_debugaddr.c (technical-description)
- hackmd.io/@haindpwn/libdwarf-debug-addr-table-section-offset-oob-read (third-party-advisory)
- www.vulncheck.com/advisories/libdwarf-through-2.3.3-heap-out-of-bounds-read-via… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-116732?
- CVE-2026-116732 is a medium-severity vulnerability in Davea42 Libdwarf, classified under Out-of-bounds Read. CVSS score: 4.4/10. Published 2026-10-26.
- How severe is CVE-2026-116732?
- Medium severity. CVSS v3 base score is 4.4 out of 10.