Description
picoquic before 2026.11.05.3e2e3d3 contains an integer overflow vulnerability in picoquic_decode_time_stamp_frame() that allows remote QUIC peers to corrupt stored timestamps by sending oversized TIME_STAMP values. Attackers on connections negotiating the TIME_STAMP extension can send large values shifted by ack_delay_exponent to wrap the result, corrupting RTT and bandwidth estimation and degrading congestion control.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| private-octopus | picoquic | < 2026.11.05.3e2e3d3 | 2026.11.05.3e2e3d3 |
References
- GitHub Issue #2365 issue-tracking
- https://github.com/private-octopus/picoquic product
- https://github.com/private-octopus/picoquic/commit/ef21278928771a1ace1c6764cf0e5300d61f7d94 patch
- https://github.com/private-octopus/picoquic/pull/2343 issue-tracking patch
- picoquic v2026.11.05.3e2e3d3 Release Notes release-notes
- https://github.com/private-octopus/picoquic/blob/7966b3f6a5f1dc08a844b3bfa0b22b0f8d424736/picoquic/frames.c#L5651 technical-description
- VulnCheck Advisory: picoquic before 2026.11.05.3e2e3d3 Integer Overflow via TIME_STAMP Frame Decoder third-party-advisory