Skip to main content
cvebuzz

CVE mentions, exploit signals, and PoC evidence in one fast public view.

CVE detail

CVE-2026-40170

ngtcp2 is a C implementation of the IETF QUIC protocol. In versions prior to 1.22.1, ngtcp2_qlog_parameters_set_transport_params() serializes peer transport parameters into a fixed 1024-byte stack buffer without bounds checking. When qlog is enabled, a remote peer can send sufficiently large transport parameters during the QUIC handshake to cause writes beyond the buffer boundary, resulting in a stack buffer overflow. This affects deployments that enable the qlog callback and process untrusted peer transport parameters. This issue has been fixed in version 1.22.1. If developers are unable to immediately upgrade, they can disable the qlog on client.

CVSS 7.5 · HighBuzz score 43.5

Buzz score

Why this CVE is surfacing

Buzz score total 43.5

This all-time snapshot uses the same composite formula as Trending across a 30-year evidence window, rather than a current rolling window.

Buzz score components · mention 24.0 · diversity 19.5 · KEV 0.0 · OTX 0.0 · PoC 0.0
Mention score
24.0
10 evidence mentions in the snapshot
Diversity score
19.5
6 sources across 3 categories
KEV score
0.0
No KEV entry observed
OTX score
0.0
0 OTX pulses
PoC score
0.0
0 repos · best confidence N/A
Best PoC traction
0
Maximum stars on a matched PoC repo

Why it matters now

Mention timeline

Total mentions
0
within the 30d window
Peak daily
0
highest bucket

Evidence

Source links by recency

Newest mentions first
10 source links · newest first

Exploit code

Public exploit repository references

Public PoC repositories are third-party, potentially unsafe artifacts. Treat their code as untrusted and use it only on authorized systems in an isolated, least-privilege environment. cvebuzz does not execute the code or verify that an exploit works.

0 repository references · best confidence N/A · max 0 stars
No public PoC repositories have been matched yet.

Related records

Similar CVEs

6 related CVEs with shared weakness or product evidence
  • CVE-2026-49759

    Stack-based Buffer Overflow vulnerability in Erlang OTP erts (inet_drv) allows an unauthenticated remote attacker to crash the BEAM VM by sending a crafted SCTP ERROR chunk. The…

    CVSS 8.8 · High
    8 mentions
  • CVE-2024-48519

    Buffer Overflow vulnerability in Ardupilot rover commit v.c56439b045162058df0ff136afea3081fcd06d38 allows a local attacker to cause a denial of service via the AP_InertialSensor_A…

    CVSS 6.2 · Medium
  • CVE-2025-69720

    The infocmp command-line tool in ncurses before 6.5-20251213 has a stack-based buffer overflow in analyze_string in progs/infocmp.c.

    CVSS 7.3 · High
    Public PoC observed1 mention
  • CVE-2026-3081

    GStreamer H.266 Codec Parser Stack-based Buffer Overflow Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected inst…

    CVSS 7.8 · High
    5 mentions
  • CVE-2026-31795

    iccDEV provides a set of libraries and tools for working with ICC color management profiles. Prior to 2.3.1.5, there is a stack buffer overflow write in CIccXform3DLut::Apply() co…

    CVSS 7.8 · High
    4 mentions
  • CVE-2026-30987

    iccDEV provides a set of libraries and tools for working with ICC color management profiles. Prior to 2.3.1.5, there is a stack buffer overflow in CIccTagNum<>::GetValues() causin…

    CVSS 7.8 · High
    4 mentions