Source: libfyaml Version: 0.9.4-1 Severity: important Tags: security upstream Forwarded: https://github.com/pantoniou/libfyaml/issues/315 X-Debbugs-Cc: [email protected], Debian Security Team <[email protected]>
Hi, The following vulnerability was published for libfyaml. CVE-2026-88359[0]: | 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. If you fix the vulnerability please also make sure to include the CVE (Common Vulnerabilities & Exposures) id in your changelog entry. For further information see: [0] https://security-tracker.debian.org/tracker/CVE-2026-88359 https://www.cve.org/CVERecord?id=CVE-2026-88359 [1] https://github.com/pantoniou/libfyaml/issues/315 [2] https://github.com/pantoniou/libfyaml/commit/12d903a5c9163d15edf2ef9d7311bd0d1505d902 Please adjust the affected versions in the BTS as needed. Regards, Salvatore
