Cette page suit l'état du correctif pour Debian. La vulnérabilité elle-même est décrite sur la page CVE principale.
Voir CVE-2026-81722 →
DEBIAN-CVE-2026-81722
nltk PorterStemmer in versions
Description d'origine
La description telle que publiée par la source (souvent en anglais).
nltk PorterStemmer in versions <= 3.10.2 (fixed in 3.10.3) contains an inefficient-algorithmic-complexity denial of service in PorterStemmer.stem(). The _is_consonant() helper walks backward over the entire run of trailing 'y' characters on every call, and _measure() invokes it for each stem position, causing O(n^2) behavior. A single ~20-50 KB untrusted token consisting of a long run of the letter 'y' followed by a matching suffix (e.g., 'ness') can pin a CPU core for seconds to minutes, causing availability impact.
Source: OSV.dev (Open Source Vulnerabilities) OSV
Paquets affectés
Debian:12
nltk
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Debian:13
nltk
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Debian:14
nltk
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.10.3-1"}]}]
Références
- advisory security-tracker.debian.org