CVEvulnerability
CVE-2026-88359
6.5 MEDIUM
Official page ↗
- Status
- Deferred
- Published
- 2026-09-24
- Last modified
- 2026-09-25
- Assigner
- [email protected]
- CVSS 3.1 (134c704f-9b21-4f2e-91b3-4a467353bcc0)
- 6.5 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
- Weaknesses
- CWE-770
Description
libfyaml 0.9.6 contains a stack exhaustion vulnerability in fy_atom_iter_format(). When processing a specially crafted YAML document containing a very large literal or folded block scalar, the function repeatedly grows an internal buffer using alloca() inside a loop. The allocated stack memory is not released until the function returns, causing cumulative stack growth that can exceed the process stack limit and result in SIGSEGV and denial of service.
Related
Weakness · CWE (1)
- CWE-770 Allocation of Resources Without Limits or Throttling weakness
References
- https://github.com/pantoniou/libfyaml/commit/20502068902d58c076da873117985798df2c7e74 github.com
- https://github.com/pantoniou/libfyaml/commit/93741a7c9331da9da65ef7a25f2d7d6a817a1c29 github.com
- https://github.com/pantoniou/libfyaml/issues/315 github.com
- https://github.com/pantoniou/libfyaml/issues/315 github.com