Description
Telegram Android <7.1.0 (2090), Telegram iOS <7.1, and Telegram macOS <7.1 are affected by a Type Confusion in the VDasher constructor of their custom fork of the rlottie library. A remote attacker might be able to access Telegram's heap memory out-of-bounds on a victim device via a malicious animated sticker.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | rlottie | 0.1+dfsg-2 | — |
| Debian 13 | rlottie | 0.1+dfsg-2 | — |
| Debian 12 | rlottie | 0.1+dfsg-2 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 22.04 LTS | rlottie | 0.1+dfsg-2ubuntu0.1 | USN-7198-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 20.04 LTS | rlottie | 0~git20200305.a717479+dfsg-1ubuntu0.1~esm1 | USN-7198-1 |
Advisories 1
- USN-7198-1 rlottie vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026