CVE-2026-129135

EUVD-2026-125544
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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
3.7 LOW
NETWORK
HIGH
NONE
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
Awaiting analysis
This vulnerability is currently awaiting analysis.
Base Score
CVSS 3.x
EPSS Score
Percentile: Unknown
Common Weakness Enumeration
References
https://github.com/private-octopus/picoquic
https://github.com/private-octopus/picoquic/blob/7966b3f6a5f1dc08a844b3bfa0b22b0f8d424736/picoquic/frames.c#L5651
https://github.com/private-octopus/picoquic/commit/ef21278928771a1ace1c6764cf0e5300d61f7d94
https://github.com/private-octopus/picoquic/issues/2365
https://github.com/private-octopus/picoquic/pull/2343
https://github.com/private-octopus/picoquic/releases/tag/v2026.11.05.3e2e3d3
https://www.vulncheck.com/advisories/picoquic-before-2026.11.05-3e2e3d3-integer-overflow-via-time-stamp-frame-decoder