CVE-2026-129135
picoquic before 2026.11.05.3e2e3d3 Integer Overflow via TIME_STAMP Frame Decoder
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.
Fixes and workarounds
Fix
The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.
Source: CNA: VulnCheckFix
The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.
Source: CNA: VulnCheckAffected products and versions
| Product | Versions | Authority |
|---|---|---|
| picoquic private-octopus private-octopus/picoquic
github |
≥ 0; < 2026.11.05.3e2e3d3 (affected, custom)
Other versions: unaffected |
CNA: VulnCheck |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
| Version / score | Vector | Authority |
|---|---|---|
| 4.0 / 6.3 medium |
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N | CNA: VulnCheck |
| 3.1 / 3.7 low |
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L | CNA: VulnCheck |
| 4.0 / 6.3 medium |
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/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 | NVD: [email protected] |
| 3.1 / 3.7 low |
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L | NVD: [email protected] |
Exploit evidence
No exploit evidence in collected sources. This is not proof of no exploitation.
References
- https://github.com/private-octopus/picoquic/issues/2365CNA: VulnCheck · issue-tracking
- https://github.com/private-octopus/picoquicCNA: VulnCheck · product
- https://github.com/private-octopus/picoquic/commit/ef21278928771a1ace1c6764cf0e5300d61f7d94CNA: VulnCheck · patch
- https://github.com/private-octopus/picoquic/pull/2343CNA: VulnCheck · issue-tracking, patch
- https://github.com/private-octopus/picoquic/releases/tag/v2026.11.05.3e2e3d3CNA: VulnCheck · release-notes
- https://github.com/private-octopus/picoquic/blob/7966b3f6a5f1dc08a844b3bfa0b22b0f8d424736/picoquic/frames.c#L5651CNA: VulnCheck · technical-description
- https://www.vulncheck.com/advisories/picoquic-before-2026.11.05-3e2e3d3-integer-overflow-via-time-stamp-frame-decoderCNA: VulnCheck · third-party-advisory
- https://github.com/private-octopus/picoquic[email protected]
- https://github.com/private-octopus/picoquic/blob/7966b3f6a5f1dc08a844b3bfa0b22b0f8d424736/picoquic/frames.c#L5651[email protected]
- https://github.com/private-octopus/picoquic/commit/ef21278928771a1ace1c6764cf0e5300d61f7d94[email protected]
- https://github.com/private-octopus/picoquic/issues/2365[email protected]
- https://github.com/private-octopus/picoquic/pull/2343[email protected]
- https://github.com/private-octopus/picoquic/releases/tag/v2026.11.05.3e2e3d3[email protected]
- https://www.vulncheck.com/advisories/picoquic-before-2026.11.05-3e2e3d3-integer-overflow-via-time-stamp-frame-decoder[email protected]
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