{"id":"UBUNTU-CVE-2026-26967","details":"PJSIP is a free and open source multimedia communication library written in C. In versions 2.16 and below, there is a critical Heap-based Buffer Overflow vulnerability in PJSIP's H.264 unpacketizer. The bug occurs when processing malformed SRTP packets, where the unpacketizer reads a 2-byte NAL unit size field without validating that both bytes are within the payload buffer bounds. The vulnerability affects applications that receive video using H.264. A patch is available at https://github.com/pjsip/pjproject/commit/f821c214e52b11bae11e4cd3c7f0864538fb5491.","modified":"2026-03-25T19:44:36.735987Z","published":"2026-02-20T01:15:00Z","upstream":["CVE-2026-26967"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-26967"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-26967"},{"type":"REPORT","url":"https://github.com/pjsip/pjproject/security/advisories/GHSA-x2hc-6969-g8v6"},{"type":"REPORT","url":"https://github.com/pjsip/pjproject/commit/f821c214e52b11bae11e4cd3c7f0864538fb5491"}],"affected":[{"package":{"name":"pjproject","ecosystem":"Ubuntu:Pro:16.04:LTS","purl":"pkg:deb/ubuntu/pjproject@2.1.0.0.ast20130823-1+deb8u1ubuntu0.1~esm1?arch=source&distro=esm-apps/xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.1.0.0.ast20130823-1","2.1.0.0.ast20130823-1+deb8u1build0.16.04.1","2.1.0.0.ast20130823-1+deb8u1ubuntu0.1~esm1"],"ecosystem_specific":{"binaries":[{"binary_version":"2.1.0.0.ast20130823-1+deb8u1ubuntu0.1~esm1","binary_name":"libpj2"},{"binary_version":"2.1.0.0.ast20130823-1+deb8u1ubuntu0.1~esm1","binary_name":"libpjlib-util2"},{"binary_version":"2.1.0.0.ast20130823-1+deb8u1ubuntu0.1~esm1","binary_name":"libpjmedia-audiodev2"},{"binary_version":"2.1.0.0.ast20130823-1+deb8u1ubuntu0.1~esm1","binary_name":"libpjmedia-codec2"},{"binary_version":"2.1.0.0.ast20130823-1+deb8u1ubuntu0.1~esm1","binary_name":"libpjmedia-videodev2"},{"binary_version":"2.1.0.0.ast20130823-1+deb8u1ubuntu0.1~esm1","binary_name":"libpjmedia2"},{"binary_version":"2.1.0.0.ast20130823-1+deb8u1ubuntu0.1~esm1","binary_name":"libpjnath2"},{"binary_version":"2.1.0.0.ast20130823-1+deb8u1ubuntu0.1~esm1","binary_name":"libpjproject-dev"},{"binary_version":"2.1.0.0.ast20130823-1+deb8u1ubuntu0.1~esm1","binary_name":"libpjsip-simple2"},{"binary_version":"2.1.0.0.ast20130823-1+deb8u1ubuntu0.1~esm1","binary_name":"libpjsip-ua2"},{"binary_version":"2.1.0.0.ast20130823-1+deb8u1ubuntu0.1~esm1","binary_name":"libpjsip2"},{"binary_version":"2.1.0.0.ast20130823-1+deb8u1ubuntu0.1~esm1","binary_name":"libpjsua2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-26967.json"}},{"package":{"name":"pjproject","ecosystem":"Ubuntu:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/pjproject@2.7.2~dfsg-1ubuntu0.1~esm1?arch=source&distro=esm-apps/bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.6~dfsg-2","2.7~dfsg-1","2.7.1~dfsg-1","2.7.1~dfsg-1build1","2.7.2~dfsg-1","2.7.2~dfsg-1ubuntu0.1~esm1"],"ecosystem_specific":{"binaries":[{"binary_version":"2.7.2~dfsg-1ubuntu0.1~esm1","binary_name":"libpj2"},{"binary_version":"2.7.2~dfsg-1ubuntu0.1~esm1","binary_name":"libpjlib-util2"},{"binary_version":"2.7.2~dfsg-1ubuntu0.1~esm1","binary_name":"libpjmedia-audiodev2"},{"binary_version":"2.7.2~dfsg-1ubuntu0.1~esm1","binary_name":"libpjmedia-codec2"},{"binary_version":"2.7.2~dfsg-1ubuntu0.1~esm1","binary_name":"libpjmedia-videodev2"},{"binary_version":"2.7.2~dfsg-1ubuntu0.1~esm1","binary_name":"libpjmedia2"},{"binary_version":"2.7.2~dfsg-1ubuntu0.1~esm1","binary_name":"libpjnath2"},{"binary_version":"2.7.2~dfsg-1ubuntu0.1~esm1","binary_name":"libpjproject-dev"},{"binary_version":"2.7.2~dfsg-1ubuntu0.1~esm1","binary_name":"libpjsip-simple2"},{"binary_version":"2.7.2~dfsg-1ubuntu0.1~esm1","binary_name":"libpjsip-ua2"},{"binary_version":"2.7.2~dfsg-1ubuntu0.1~esm1","binary_name":"libpjsip2"},{"binary_version":"2.7.2~dfsg-1ubuntu0.1~esm1","binary_name":"libpjsua2"},{"binary_version":"2.7.2~dfsg-1ubuntu0.1~esm1","binary_name":"libpjsua2-2v5"},{"binary_version":"2.7.2~dfsg-1ubuntu0.1~esm1","binary_name":"python-pjproject"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-26967.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N"},{"type":"Ubuntu","score":"medium"}]}