{"id":"MGASA-2026-0380","summary":"Updated python-pyasn1 packages fix security vulnerabilities","details":"The BER decoder (shared by the CER and DER codecs) parses long-form tags\nby accumulating continuation octets in a loop with no upper bound on the\nsize of the tag ID. A crafted input can force the decoder to build an\narbitrarily large integer, with CPU cost growing quadratically in input\nsize — a ~1 MB input consumes over a minute of CPU. On Python 3.11+, the\noversized tag ID can also trigger an unhandled ValueError (integer\nstring conversion limit) while the decoder formats error messages,\nviolating the documented PyAsn1Error contract and potentially bypassing\ncaller error handling.\n","modified":"2026-09-07T19:00:03.286646573Z","published":"2026-09-07T18:46:11Z","upstream":["CVE-2026-59884","CVE-2026-59885","CVE-2026-59886"],"references":[{"type":"ADVISORY","url":"https://advisories.mageia.org/MGASA-2026-0380.html"},{"type":"REPORT","url":"https://bugs.mageia.org/show_bug.cgi?id=36249"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-8712-1"},{"type":"ADVISORY","url":"https://github.com/pyasn1/pyasn1/security/advisories/GHSA-m4p7-r5rc-7g4j"}],"affected":[{"package":{"name":"python-pyasn1","ecosystem":"Mageia:10","purl":"pkg:rpm/mageia/python-pyasn1?arch=source&distro=mageia-10"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.6.4-1.mga10"}]}],"ecosystem_specific":{"section":"core"},"database_specific":{"source":"https://advisories.mageia.org/MGASA-2026-0380.json"}}],"schema_version":"1.9.0","credits":[{"name":"Mageia","contact":["https://wiki.mageia.org/en/Packages_Security_Team"],"type":"COORDINATOR"}]}