Bug 2533342 (CVE-2026-54559)

Summary:	CVE-2026-54559 pocketsphinx: PocketSphinx: Memory corruption via malicious model file loading
Product:	[Other] Security Response	Reporter:	OSIDB Bzimport <bzimport>
Component:	vulnerability	Assignee:	Product Security DevOps Team <prodsec-dev>
Status:	NEW ---	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	Keywords:	Security
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Hardware:	All
OS:	Linux
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Doc Text:	A flaw was found in PocketSphinx, a small speech recognizer. Inadequate validation of boundary conditions in language model loaders and unbounded string fields in acoustic model loaders can lead to stack or heap buffer overflows and memory corruption. An attacker with write access to a directory used by PocketSphinx can introduce a malicious model file. When PocketSphinx loads this file, it can result in memory corruption.	Story Points:	---
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	2533597, 2533598
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Description OSIDB Bzimport 2026-09-14 20:21:22 UTC

PocketSphinx is a small speech recognizer. Prior to 5.1.1, the trie language-model loaders in src/lm/ngram_model_trie.c do not adequately validate boundary conditions in ARPA, DMP, and binary format headers, and the acoustic-model loaders in src/mdef.c and src/util/bio.c use sscanf with unbounded string fields. Loading an invalid, corrupted, or malicious language or acoustic model can therefore cause stack or heap buffer overflows and memory corruption. An attacker who can write to a directory selected by POCKETSPHINX_PATH can replace or add a model file that PocketSphinx later loads; users of PocketSphinx 5prealpha have no backported patch and must migrate to the fixed release. This issue is fixed in version 5.1.1.