Vulnerability Description
Integer Overflow or Wraparound vulnerability in ash-project ash lets an attacker corrupt a stored vector and crash later reads of it by submitting a vector with more than 65,535 elements. Ash.Vector.new/1 (lib/ash/vector.ex) encodes a vector as <<dim::unsigned-16, 0::unsigned-16>> followed by the element floats, packing the element count into a 16-bit field without checking its range. A list of more than 65,535 elements wraps the dimension modulo 65,536, so the encoded header records a dimension that disagrees with the number of stored floats. from_binary/1 later reads binary-size(dim)-unit(32) from the wrapped header, so every read of the corrupted value misparses and raises, denying access to the affected record. The fix rejects any vector whose dimension exceeds 65,535. This issue affects ash: from 2.14.13 before 3.32.2.
Related Weaknesses (CWE)
References
- https://cna.erlef.org/cves/CVE-2026-82737.html
- https://github.com/ash-project/ash/commit/cef5eb7b0693f04d1699a36e02a4e09ce1e7bf
- https://github.com/ash-project/ash/security/advisories/GHSA-68q3-w4w3-2gfv
- https://osv.dev/vulnerability/EEF-CVE-2026-82737
- https://github.com/ash-project/ash/security/advisories/GHSA-68q3-w4w3-2gfv
FAQ
What is CVE-2026-82737?
CVE-2026-82737 is a documented vulnerability. Integer Overflow or Wraparound vulnerability in ash-project ash lets an attacker corrupt a stored vector and crash later reads of it by submitting a vector with more than 65,535 elements. Ash.Vector....
How severe is CVE-2026-82737?
CVSS scoring is not yet available for CVE-2026-82737. Check NVD for updates.
Is there a patch for CVE-2026-82737?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.