جزئیات آسیب‌پذیری

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.

• https://github.com/ngtcp2/ngtcp2/commit/708a7640c1f48fb8ffb540c4b8ea5b4c1dfb8ee5 x_refsource_MISC
• http://www.openwall.com/lists/oss-security/2026/04/17/12
• https://github.com/ngtcp2/ngtcp2/security/advisories/GHSA-f523-465f-8c8f x_refsource_CONFIRM
• https://access.redhat.com/security/cve/CVE-2026-40170 vdb-entryx_refsource_REDHAT
• https://bugzilla.redhat.com/show_bug.cgi?id=2459061 issue-trackingx_refsource_REDHAT
• https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-40170.json x_sadp-csaf-vex
• https://access.redhat.com/errata/RHSA-2026:22963 vendor-advisoryx_refsource_REDHAT
• https://access.redhat.com/errata/RHSA-2026:25049 vendor-advisoryx_refsource_REDHAT
• https://access.redhat.com/errata/RHSA-2026:9113 vendor-advisoryx_refsource_REDHAT