Cloudflare Quiche was affected by 2 use-after-free vulnerabilities in the connection ID iterator FFI functions.
Exact source revision recorded 27 Oct 2026 06:23:27 UTC. It does not establish the source's current position. Latest evidence.
nvd · CVE-2026-11941
PublishedCloudflare Quiche was affected by 2 use-after-free vulnerabilities in the connection ID iterator FFI functions. The “quiche_connection_id_iter_next” and “quiche_conn_retired_scid_next” functions would return a pointer to a “ConnectionId” to the applications via function arguments, but the owned “ConnectionId” would be dropped at the end of those functions' scope. Only applications using those FFI functions are affected. The FFI API is disabled by default by a build-time feature flag. Impact If unpatched, an application calling the affected FFI functions will dereference freed memory. The most likely outcome is undefined behavior leading to a process crash (denial of service). Depending on allocator state, the read may also return adjacent heap contents, resulting in limited information disclosure or incorrect connection identifier handling. Mitigation Users are requested to upgrade to quiche 0.29.2 which is the earliest version containing the fix for this issue.
NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON.
Source analysis status: Awaiting Analysis
Weakness classifications: CWE-416
Original publisher date fields
published: 2026-06-19T12:16:26.137
lastModified: 2026-10-25T23:10:00.167
- Source published
- 19 Jun 2026 12:16:26 UTC
- Source modified
- 25 Oct 2026 23:10:00 UTC
- Observed here
- 27 Oct 2026 06:23:27 UTC
- Source terms
- NIST NVD usage terms; underlying source attribution retained
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CVSS 3.1 · [email protected] · Secondary · 5.6 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L