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NRDAX-T0059 - Duplicate Transport Parameter Memory Leak

Memory amplification · P2P and gossip · no bound · active · first seen 2026-07-11

provenance: Reproduced in NullRabbit's attack-reproduction pipeline

mechanism

msquic duplicate-transport-parameters VersionInfo leak (CVE-2024-26190): flood of QUIC v1 Initial packets (distinct SCID / new connection each), every Initial carrying a CRYPTO frame (type 0x06) whose body is a TLS ClientHello that repeats the quic_transport_parameters extension (0x0039) 32 times, each extension an encoded transport-parameters blob embedding a version_information TP (id 0x11). Pre-fix msquic re-decoded EACH duplicate into the same struct, allocating VersionInfo (QUIC_POOL_VERSION_INFO) per decode and zeroing without freeing -> one leaked heap buffer per duplicate; total leaked ~= connections x 32. The leak is driven during ClientHello extension parsing (pre-handshake-completion), so a loopback mock that cannot finish a real TLS 1.3 handshake still carries the load-bearing artefacts (duplicated 0x0039 extension + embedded 0x11 TP). public-cve-replication - replicated wire signature, not a NullRabbit measurement. Affected msquic < 2.1.12 (2.1.x), < 2.2.7 (2.2.x), < 2.3.5; fixed 2.1.12, 2.2.7, 2.3.5; CWE-401 (Missing Release of Memory) / CWE-400 (Uncontrolled Resource Consumption); CVSS 3.1 7.5 (High); fix commit d364feeda0dd8b729eca6fef149c1ef98630f0cb. https://github.com/microsoft/msquic/security/advisories/GHSA-2x7m-gf85-3745

live exposure

No exposure data. Slashr ↗ has no risk signal mapped to this technique yet — absence of data is not absence of exposure.

instances (1)

chainprimitivefidelityoriginreproducer (bundle)source
quic msquic_dup_tp_versioninfo_leak lab reverse-engineered-cve msquic_dup_tp_versioninfo_leak CVE-2024-26190 ↗

related (Memory amplification)

NRDAX-T0023 - Coalesced Packet Buffer Leak active NRDAX-T0025 - Compact Block Size Integer Overflow active NRDAX-T0038 - Count Underflow Header Serving Amplification active NRDAX-T0042 - Crypto Frame Reassembly Buffer Exhaustion active NRDAX-T0046 - Decompression Bomb Resource Exhaustion active NRDAX-T0061 - Duplicate Tx Mempool Index Desync active NRDAX-T0071 - Ethash Verification Memory Exhaustion active NRDAX-T0095 - GraphQL Alias Query Amplification active

cite

https://nrdax.com/techniques/NRDAX-T0059

plain

NRDAX Registry. Technique NRDAX-T0059.

bibtex
@misc{nrdax_NRDAX_T0059,
  title = {Duplicate Transport Parameter Memory Leak (NRDAX-T0059)},
  howpublished = {NRDAX Registry},
  url = {https://nrdax.com/techniques/NRDAX-T0059},
}
json (csl)
{
  "id": "nrdax-NRDAX-T0059",
  "type": "dataset",
  "title": "Duplicate Transport Parameter Memory Leak (NRDAX-T0059)",
  "URL": "https://nrdax.com/techniques/NRDAX-T0059",
  "publisher": "NRDAX Registry"
}
badge

NRDAX-T0059 in the NRDAX registry

[![NRDAX-T0059 in the NRDAX registry](https://nrdax.com/badge/NRDAX-T0059.svg)](https://nrdax.com/techniques/NRDAX-T0059-duplicate-transport-parameter-memory-leak)

use from the CLI

Retrieve or cite this technique from a script or the terminal with the NRDAX Python library & CLI.

Retrieve this technique 
nrdax get NRDAX-T0059
Cite it (BibTeX) 
nrdax cite NRDAX-T0059 --format bibtex

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