{"id":"DEBIAN-CVE-2021-47793","details":"Telegram Desktop 2.9.2 contains a denial of service vulnerability that allows attackers to crash the application by sending an oversized message payload. Attackers can generate a 9 million byte buffer and paste it into the messaging interface to trigger an application crash.","modified":"2026-07-06T14:00:42.572209428Z","published":"2026-01-16T00:16:23.207Z","withdrawn":"2026-07-06T14:00:42.572209209Z","upstream":["CVE-2021-47793"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2021-47793"}],"affected":[{"package":{"name":"telegram-desktop","ecosystem":"Debian:11","purl":"pkg:deb/debian/telegram-desktop?arch=source&distro=bullseye"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.6.1+ds-1","2.6.1+ds-1+deb11u1","2.9.0+ds-1","2.9.0+ds1-2","2.9.2+ds-1","2.9.2+ds-1~bpo10+1","2.9.2+ds-1~bpo11+1","3.1.1+ds-1","3.1.1+ds-1~bpo10+1","3.1.1+ds-1~bpo11+1","3.1.1+ds-1~deb11u2","3.1.8+ds-1","3.3.0+ds-1","3.3.0+ds-2","3.4.2+ds-1","3.4.3+ds-1","3.4.3+ds-1~bpo11+1","3.4.8+ds-1","3.5.2+ds-1","3.5.2+ds-1~bpo11+1","3.6.0+ds-1","3.6.1+ds-1","3.6.1+ds-2","3.6.1+ds-3","3.7.1+ds-1","3.7.3+ds-1","3.7.3+ds-2","4.0.2+ds-1","4.0.2+ds-2","4.1.0+ds-1","4.1.1+ds-1","4.10.3+ds-1","4.10.3+ds-2","4.11.5+ds-1","4.11.8+ds-1","4.13.1+ds-1","4.14.3+ds-1","4.14.4+ds-1","4.14.9+ds-1","4.14.9+ds-1.1","4.2.0+ds-1","4.2.4+ds-1","4.2.4+ds-1~bpo11+1","4.3.1+ds-1","4.3.1+ds-1~bpo11+1","4.3.4+ds-1","4.3.4+ds-2","4.4.1+ds-1","4.4.1+ds-1~bpo11+1","4.5.3+ds-1","4.5.3+ds-1~bpo11+1","4.6.0+ds-1","4.6.2+ds-1","4.6.5+ds-1","4.6.5+ds-1~bpo11+1","4.6.5+ds-2","4.8.1+ds-1","4.8.1+ds-2","4.8.1+ds-2~bpo11+1","4.8.1+ds-2~bpo12+1","4.9.3+ds-1","4.9.7+ds-1","5.7.2+ds-2","5.7.2+ds-2~bpo13+1","5.7.2+ds-3","5.7.2+ds-4","5.7.2+ds-5"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2021-47793.json"}},{"package":{"name":"telegram-desktop","ecosystem":"Debian:12","purl":"pkg:deb/debian/telegram-desktop?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.10.3+ds-1","4.10.3+ds-2","4.11.5+ds-1","4.11.8+ds-1","4.13.1+ds-1","4.14.3+ds-1","4.14.4+ds-1","4.14.9+ds-1","4.14.9+ds-1.1","4.6.5+ds-2","4.8.1+ds-1","4.8.1+ds-2","4.8.1+ds-2~bpo11+1","4.8.1+ds-2~bpo12+1","4.9.3+ds-1","4.9.7+ds-1","5.7.2+ds-2","5.7.2+ds-2~bpo13+1","5.7.2+ds-3","5.7.2+ds-4","5.7.2+ds-5"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2021-47793.json"}},{"package":{"name":"telegram-desktop","ecosystem":"Debian:14","purl":"pkg:deb/debian/telegram-desktop?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.0.14-1","1.0.29-1","1.1.0-1","1.1.10-1","1.1.18-1","1.1.19-1","1.1.19-2","1.1.23-1","1.1.23-1~bpo9+1","1.1.23-2","1.1.23-3","1.2.1-1","1.2.1-2","1.2.15-1","1.2.17-1","1.2.6-1","1.2.6-2","1.3.10-1","1.3.10-2","1.3.14-1","1.3.7-1","1.4.0-1","1.5.11-1","1.5.2-1","1.5.4-1","1.5.8-1","1.7.0-1","1.7.14-1","1.8.15-1","1.8.15-2","1.8.15-2~bpo10+1","1.8.2-1","1.8.2-2","1.8.4-1","1.8.8-1","1.9.14+ds-1","1.9.14+ds-2","1.9.21+ds-1","1.9.8~slim-1","2.0.1+ds-1","2.1.0+ds-1","2.1.4+ds-1","2.1.5+ds-1","2.1.7+ds-1","2.1.7+ds-2","2.2.0+ds-1","2.2.0+ds-2","2.2.0+ds-2~bpo10+1","2.2.0+ds-3","2.2.0+ds-4","2.2.0+ds-5","2.5.8+ds-1","2.5.8+ds-2","2.6.1+ds-1","2.6.1+ds-1~bpo10+1","2.9.0+ds-1","2.9.0+ds1-2","2.9.2+ds-1","2.9.2+ds-1~bpo10+1","2.9.2+ds-1~bpo11+1","3.1.1+ds-1","3.1.1+ds-1~bpo10+1","3.1.1+ds-1~bpo11+1","3.1.1+ds-1~deb11u2","3.1.8+ds-1","3.3.0+ds-1","3.3.0+ds-2","3.4.2+ds-1","3.4.3+ds-1","3.4.3+ds-1~bpo11+1","3.4.8+ds-1","3.5.2+ds-1","3.5.2+ds-1~bpo11+1","3.6.0+ds-1","3.6.1+ds-1","3.6.1+ds-2","3.6.1+ds-3","3.7.1+ds-1","3.7.3+ds-1","3.7.3+ds-2","4.0.2+ds-1","4.0.2+ds-2","4.1.0+ds-1","4.1.1+ds-1","4.10.3+ds-1","4.10.3+ds-2","4.11.5+ds-1","4.11.8+ds-1","4.13.1+ds-1","4.14.3+ds-1","4.14.4+ds-1","4.14.9+ds-1","4.14.9+ds-1.1","4.2.0+ds-1","4.2.4+ds-1","4.2.4+ds-1~bpo11+1","4.3.1+ds-1","4.3.1+ds-1~bpo11+1","4.3.4+ds-1","4.3.4+ds-2","4.4.1+ds-1","4.4.1+ds-1~bpo11+1","4.5.3+ds-1","4.5.3+ds-1~bpo11+1","4.6.0+ds-1","4.6.2+ds-1","4.6.5+ds-1","4.6.5+ds-1~bpo11+1","4.6.5+ds-2","4.8.1+ds-1","4.8.1+ds-2","4.8.1+ds-2~bpo11+1","4.8.1+ds-2~bpo12+1","4.9.3+ds-1","4.9.7+ds-1","5.7.2+ds-2","5.7.2+ds-2~bpo13+1","5.7.2+ds-3","5.7.2+ds-4","5.7.2+ds-5"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2021-47793.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X"}]}