Summary
Zou Dikai discovered that ngtcp2 serialized peer transport parameters into
a fixed 1024-byte stack buffer without bounds checking. When qlog was
enabled, a remote attacker could possibly use this issue to execute
arbitrary code.
Fixed packages 4
| Release | Package | Fixed in |
|---|---|---|
| Ubuntu · 24.04 LTS 24.04:LTS | ngtcp2 | 0.12.1+dfsg-1+deb12u1build0.24.04.1 |
| Ubuntu · 25.10 | ngtcp2 | 1.11.0-1+deb13u1build0.25.10.1 |
| Ubuntu · 26.04 LTS 26.04:LTS | ngtcp2 | 1.16.0-1ubuntu0.1 |
| Ubuntu · Pro 22.04 LTS Pro:22.04:LTS | ngtcp2 | 0.1.0+dfsg-1ubuntu0.1~esm1 |
References
-
report
https://ubuntu.com/security/CVE-2026-40170