Picotls is a TLS protocol library that allows users select different crypto backends based on their use case. In affected revisions through 44bc503, when picotls is used as a `client-side TLS stack`, a peer can send a `HelloRetryRequest` followed by a `spoofed Hello message` that causes a null-pointer dereference. This can terminate the consuming process, including a process performing other work, resulting in denial of service. This issue is fixed in commit a06ca41.
Fix
Nothing published yet: no patch, vendor advisory or mitigation reference on NVD, no vendor advisory in the News for this CVE, not in CISA's KEV, no fixed package version. BaselineWatch does not guess at one.
Change history 1
- First seenCVSS 6.5 · h2oNVD modified 2026-10-30 21:01
Affected (CPE criteria) 0
NVD has not attached CPE configurations yet.
References 3
- https://github.com/h2o/picotls/security/advisories/GHSA-2xcv-h2pg-m99c x_refsource_confirm
- https://github.com/h2o/picotls/pull/608 x_refsource_misc
- https://github.com/h2o/picotls/commit/a06ca417a16f9126808bf5cabe6c5e6e0f16ecae x_refsource_misc