PT-2026-60899 · Pypi · Pocketsphinx
CVE-2026-54559
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Published
2026-07-17
·
Updated
2026-07-17
CVSS v4.0
6.9
Medium
| Vector | AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N |
Impact
The trie language model code introduced in PocketSphinx 5prealpha failed to check various boundary conditions when reading the headers of ARPA, DMP, and binary format language model files. In the case of invalid, corrupted or malicious input files, this could lead to stack and heap buffer overflows.
In addition, the acoustic model loading code (which is over 30 years old...) contains numerous instances of
sscanf with an unbounded string field which could also lead to stack overflows in the case of corrupt or malicious inputs.Because PocketSphinx will search the directory given by the
POCKETSPHINX PATH environment variable for acoustic and language model files, if this directory is writable by untrusted users, an attacker could corrupt an existing file or write a malicious one to this directory in order to trigger the vulnerability.Patches
The problem has been corrected in PocketSphinx 5.1.1.
There is no patch currently available for users of Pocketsphinx 5prealpha, who are encouraged to migrate as soon as possible to PocketSphinx 5.1.1.
Workarounds
Ensure that the
POCKETSPHINX PATH environment variable is either unset, or set to a directory whose contents are trusted and which cannot be written by untrusted users.Exploit
Fix
Stack Overflow
Buffer Overflow
Heap Based Buffer Overflow
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Related Identifiers
Affected Products
Pocketsphinx