{"id":"UBUNTU-CVE-2026-15712","details":"A heap buffer over-read vulnerability was discovered in libsoup's (versions: libsoup 3.0 to 3.7.0) HTTP/2 connection tracking framework. When the library processes an HTTP/2 GOAWAY frame, it improperly handles the \"Additional Debug Data\" payload by assuming the data stream is a safely NUL-terminated C-string. Because the parser lacks strict length-boundary verification before reading this data, a remote, unauthenticated attacker can intentionally send a malformed GOAWAY frame missing the appropriate null delimiter. This causes the library to read past the end of the allocated buffer, triggering an application crash that results in a denial of service (DoS), or potentially exposing fragments of memory contents.","modified":"2026-09-18T01:00:12.585320483Z","published":"2026-07-14T19:16:00Z","upstream":["CVE-2026-15712"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-15712"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-15712"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2026-15712"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2499939"},{"type":"REPORT","url":"https://gitlab.gnome.org/GNOME/libsoup/-/work_items/540"}],"affected":[{"package":{"name":"libsoup3","ecosystem":"Ubuntu:Pro:22.04:LTS","purl":"pkg:deb/ubuntu/libsoup3?arch=source&distro=esm-apps%2Fjammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.0.4-2","3.0.4-3","3.0.5-1","3.0.7-0ubuntu1","3.0.7-0ubuntu1+esm1","3.0.7-0ubuntu1+esm2","3.0.7-0ubuntu1+esm3","3.0.7-0ubuntu1+esm4","3.0.7-0ubuntu1+esm5","3.0.7-0ubuntu1+esm6","3.0.7-0ubuntu1+esm7","3.0.7-0ubuntu1+esm8"],"ecosystem_specific":{"binaries":[{"binary_name":"gir1.2-soup-3.0","binary_version":"3.0.7-0ubuntu1+esm8"},{"binary_name":"libsoup-3.0-0","binary_version":"3.0.7-0ubuntu1+esm8"},{"binary_version":"3.0.7-0ubuntu1+esm8","binary_name":"libsoup-3.0-common"},{"binary_name":"libsoup-3.0-tests","binary_version":"3.0.7-0ubuntu1+esm8"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-15712.json"}},{"package":{"name":"libsoup3","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/libsoup3?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.4.2-4","3.4.4-1","3.4.4-2","3.4.4-4","3.4.4-5","3.4.4-5build1","3.4.4-5build2","3.4.4-5ubuntu0.1","3.4.4-5ubuntu0.2","3.4.4-5ubuntu0.3","3.4.4-5ubuntu0.4","3.4.4-5ubuntu0.5","3.4.4-5ubuntu0.6","3.4.4-5ubuntu0.7","3.4.4-5ubuntu0.8"],"ecosystem_specific":{"binaries":[{"binary_name":"gir1.2-soup-3.0","binary_version":"3.4.4-5ubuntu0.8"},{"binary_name":"libsoup-3.0-0","binary_version":"3.4.4-5ubuntu0.8"},{"binary_version":"3.4.4-5ubuntu0.8","binary_name":"libsoup-3.0-common"},{"binary_version":"3.4.4-5ubuntu0.8","binary_name":"libsoup-3.0-tests"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-15712.json"}},{"package":{"name":"libsoup3","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/libsoup3?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.6.5-4","3.6.5-5","3.6.5-6","3.6.5-7","3.6.5-9","3.6.6-1"],"ecosystem_specific":{"binaries":[{"binary_name":"gir1.2-soup-3.0","binary_version":"3.6.6-1"},{"binary_version":"3.6.6-1","binary_name":"libsoup-3.0-0"},{"binary_version":"3.6.6-1","binary_name":"libsoup-3.0-common"},{"binary_name":"libsoup-3.0-tests","binary_version":"3.6.6-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-15712.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"medium"}]}