{"url":"http://public2.vulnerablecode.io/api/packages/1056721?format=json","purl":"pkg:deb/debian/olm@3.2.13~dfsg-1","type":"deb","namespace":"debian","name":"olm","version":"3.2.13~dfsg-1","qualifiers":{},"subpath":"","is_vulnerable":false,"next_non_vulnerable_version":null,"latest_non_vulnerable_version":null,"affected_by_vulnerabilities":[],"fixing_vulnerabilities":[{"url":"http://public2.vulnerablecode.io/api/vulnerabilities/11799?format=json","vulnerability_id":"VCID-1mm2-4b1k-afat","summary":"Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')\nThe olm_session_describe function in Matrix libolm is vulnerable to a buffer overflow. The Olm session object represents a cryptographic channel between two parties. Therefore, its state is partially controllable by the remote party of the channel. Attackers can construct a crafted sequence of messages to manipulate the state of the receiver's session in such a way that, for some buffer sizes, a buffer overflow happens on a call to olm_session_describe. Furthermore, safe buffer sizes were undocumented. The overflow content is partially controllable by the attacker and limited to ASCII spaces and digits. The known affected products are Element Web And SchildiChat Web.","references":[{"reference_url":"https://api.first.org/data/v1/epss?cve=CVE-2021-44538","reference_id":"","reference_type":"","scores":[{"value":"0.01416","scoring_system":"epss","scoring_elements":"0.80652","published_at":"2026-05-05T12:55:00Z"},{"value":"0.01416","scoring_system":"epss","scoring_elements":"0.80503","published_at":"2026-04-01T12:55:00Z"},{"value":"0.01416","scoring_system":"epss","scoring_elements":"0.80589","published_at":"2026-04-21T12:55:00Z"},{"value":"0.01416","scoring_system":"epss","scoring_elements":"0.80615","published_at":"2026-04-24T12:55:00Z"},{"value":"0.01416","scoring_system":"epss","scoring_elements":"0.80619","published_at":"2026-04-26T12:55:00Z"},{"value":"0.01416","scoring_system":"epss","scoring_elements":"0.80635","published_at":"2026-04-29T12:55:00Z"},{"value":"0.01416","scoring_system":"epss","scoring_elements":"0.80509","published_at":"2026-04-02T12:55:00Z"},{"value":"0.01416","scoring_system":"epss","scoring_elements":"0.80531","published_at":"2026-04-04T12:55:00Z"},{"value":"0.01416","scoring_system":"epss","scoring_elements":"0.80521","published_at":"2026-04-07T12:55:00Z"},{"value":"0.01416","scoring_system":"epss","scoring_elements":"0.8055","published_at":"2026-04-08T12:55:00Z"},{"value":"0.01416","scoring_system":"epss","scoring_elements":"0.8056","published_at":"2026-04-09T12:55:00Z"},{"value":"0.01416","scoring_system":"epss","scoring_elements":"0.80578","published_at":"2026-04-11T12:55:00Z"},{"value":"0.01416","scoring_system":"epss","scoring_elements":"0.80564","published_at":"2026-04-12T12:55:00Z"},{"value":"0.01416","scoring_system":"epss","scoring_elements":"0.80556","published_at":"2026-04-13T12:55:00Z"},{"value":"0.01416","scoring_system":"epss","scoring_elements":"0.80585","published_at":"2026-04-16T12:55:00Z"},{"value":"0.01416","scoring_system":"epss","scoring_elements":"0.80586","published_at":"2026-04-18T12:55:00Z"}],"url":"https://api.first.org/data/v1/epss?cve=CVE-2021-44538"},{"reference_url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-38496","reference_id":"","reference_type":"","scores":[],"url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-38496"},{"reference_url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-38500","reference_id":"","reference_type":"","scores":[],"url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-38500"},{"reference_url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-38502","reference_id":"","reference_type":"","scores":[],"url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-38502"},{"reference_url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-38503","reference_id":"","reference_type":"","scores":[],"url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-38503"},{"reference_url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-38504","reference_id":"","reference_type":"","scores":[],"url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-38504"},{"reference_url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-38506","reference_id":"","reference_type":"","scores":[],"url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-38506"},{"reference_url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-38507","reference_id":"","reference_type":"","scores":[],"url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-38507"},{"reference_url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-38508","reference_id":"","reference_type":"","scores":[],"url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-38508"},{"reference_url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-38509","reference_id":"","reference_type":"","scores":[],"url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-38509"},{"reference_url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-4126","reference_id":"","reference_type":"","scores":[],"url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-4126"},{"reference_url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-4129","reference_id":"","reference_type":"","scores":[],"url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-4129"},{"reference_url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-43528","reference_id":"","reference_type":"","scores":[],"url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-43528"},{"reference_url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-43529","reference_id":"","reference_type":"","scores":[],"url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-43529"},{"reference_url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-43534","reference_id":"","reference_type":"","scores":[],"url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-43534"},{"reference_url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-43535","reference_id":"","reference_type":"","scores":[],"url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-435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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.","references":[{"reference_url":"https://api.first.org/data/v1/epss?cve=CVE-2021-34813","reference_id":"","reference_type":"","scores":[{"value":"0.04458","scoring_system":"epss","scoring_elements":"0.89118","published_at":"2026-05-05T12:55:00Z"},{"value":"0.04458","scoring_system":"epss","scoring_elements":"0.8902","published_at":"2026-04-01T12:55:00Z"},{"value":"0.04458","scoring_system":"epss","scoring_elements":"0.89028","published_at":"2026-04-02T12:55:00Z"},{"value":"0.04458","scoring_system":"epss","scoring_elements":"0.89043","published_at":"2026-04-04T12:55:00Z"},{"value":"0.04458","scoring_system":"epss","scoring_elements":"0.89045","published_at":"2026-04-07T12:55:00Z"},{"value":"0.04458","scoring_system":"epss","scoring_elements":"0.89062","published_at":"2026-04-08T12:55:00Z"},{"value":"0.04458","scoring_system":"epss","scoring_elements":"0.89067","published_at":"2026-04-09T12:55:00Z"},{"value":"0.04458","scoring_system":"epss","scoring_elements":"0.89079","published_at":"2026-04-11T12:55:00Z"},{"value":"0.04458","scoring_system":"epss","scoring_elements":"0.89075","published_at":"2026-04-12T12:55:00Z"},{"value":"0.04458","scoring_system":"epss","scoring_elements":"0.89072","published_at":"2026-04-13T12:55:00Z"},{"value":"0.04458","scoring_system":"epss","scoring_elements":"0.89087","published_at":"2026-04-18T12:55:00Z"},{"value":"0.04458","scoring_system":"epss","scoring_elements":"0.89083","published_at":"2026-04-21T12:55:00Z"},{"value":"0.04458","scoring_system":"epss","scoring_elements":"0.89101","published_at":"2026-04-24T12:55:00Z"},{"value":"0.04458","scoring_system":"epss","scoring_elements":"0.89108","published_at":"2026-04-26T12:55:00Z"},{"value":"0.04458","scoring_system":"epss","scoring_elements":"0.89111","published_at":"2026-04-29T12:55:00Z"}],"url":"https://api.first.org/data/v1/epss?cve=CVE-2021-34813"},{"reference_url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-34813","reference_id":"","reference_type":"","scores":[],"url":"https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-34813"},{"reference_url":"https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=989997","reference_id":"989997","reference_type":"","scores":[],"url":"https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=989997"},{"reference_url":"https://security.archlinux.org/AVG-2077","reference_id":"AVG-2077","reference_type":"","scores":[{"value":"Low","scoring_system":"archlinux","scoring_elements":""}],"url":"https://security.archlinux.org/AVG-2077"},{"reference_url":"https://usn.ubuntu.com/USN-5194-1/","reference_id":"USN-USN-5194-1","reference_type":"","scores":[],"url":"https://usn.ubuntu.com/USN-5194-1/"}],"fixed_packages":[{"url":"http://public2.vulnerablecode.io/api/packages/1056721?format=json","purl":"pkg:deb/debian/olm@3.2.13~dfsg-1","is_vulnerable":false,"affected_by_vulnerabilities":[],"resource_url":"http://public2.vulnerablecode.io/packages/pkg:deb/debian/olm@3.2.13~dfsg-1"}],"aliases":["CVE-2021-34813"],"risk_score":1.4,"exploitability":"0.5","weighted_severity":"2.7","resource_url":"http://public2.vulnerablecode.io/vulnerabilities/VCID-eejx-9f6j-9qej"}],"risk_score":null,"resource_url":"http://public2.vulnerablecode.io/packages/pkg:deb/debian/olm@3.2.13~dfsg-1"}