CVE detail
CVE-2026-34183
Issue summary: Remote peer may exhaust heap memory of the QUIC server or client by flooding it with packets containing PATH_CHALLENGE frames. Impact summary: A malicious remote peer can cause an unbounded memory allocation which can lead to an abnormal termination of the application acting as a QUIC client or server and a Denial of Service. A remote peer may exhaust heap memory by flooding the local QUIC stack with PATH_CHALLENGE frames. The local QUIC stack allocates a PATH_RESPONSE frame for every PATH_CHALLENGE it receives. The allocated PATH_RESPONSE frame gets freed only when the remote peer acknowledges reception of the PATH_RESPONSE frame which will not be done by a malicious peer. The FIPS modules in 4.0, 3.6, 3.5, 3.4, and 3.0 are not affected by this issue. The QUIC stack is outside of OpenSSL FIPS module boundary.
Buzz score
Why this CVE is surfacing
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 20.8 · diversity 20.0 · KEV 0.0 · OTX 0.0 · PoC 0.0
Why it matters now
Mention timeline
- Total mentions
- 1
- within the 30d window
- Peak daily
- 1
- highest bucket
Evidence
Source links by recency
7 source links · newest first
. This story will be updated with any response. The project's line is finer than it looks. In January, OpenSSL assigned CVE-2025-66199 , rated Low, to a TLS 1.3 certificate-compression bug in which a peer-supplied length grew a heap buffer before validation, worth around 22 MiB per connection. That one needed four things to line up: certificate compres
newsthehackernews.comJul 17, 2026, 8:20 PMInformation published.
vendormsrc.microsoft.comJun 13, 2026, 8:02 AM- https://openssl-library.org/news/secadv/20260609.txtopenssl-library.org
No excerpt available.
Vendor Advisoryopenssl-library.orgJun 9, 2026, 5:17 PM No excerpt available.
Exploitgithub.comJun 9, 2026, 5:17 PMNo excerpt available.
Exploitgithub.comJun 9, 2026, 5:17 PMNo excerpt available.
Exploitgithub.comJun 9, 2026, 5:17 PMNo excerpt available.
Exploitgithub.comJun 9, 2026, 5:17 PM
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
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