https://vulnerability.circl.lu/rss/recent/all/10 Most recent entries from all 2026-10-10T20:05:57.666010+00:00 Vulnerability-Lookup info@circl.lu python-feedgen Contains only the most 10 recent entries. https://vulnerability.circl.lu/vuln/cve-2021-34813 CVE-2021-34813 2026-10-10T20:05:57.981984+00:00

Matrix libolm before 3.2.3 allows a malicious Matrix homeserver to crash a client (while it is attempting to retrieve an Olm encrypted room key backup from the homeserver) because olm_pk_decrypt has a stack-based buffer overflow. Remote code execution might be possible for some nonstandard build configurations.

 https://vulnerability.circl.lu/vuln/usn-5194-1 USN-5194-1 — olm vulnerability 2026-10-10T20:05:57.982098+00:00

Affected: Ubuntu:Pro:20.04:LTS: olm

Denis Kasak discovered that Olm was not verifying the length of input being processed by the olm_pk_decrypt module, which introduced a stack-based buffer overflow vulnerability to the library. An attacker could use this to cause a denial of service (application crash) or possibly execute arbitrary code.