Debian 11 — libheif — multiple vulnerabilities (19 CVEs) — patch and remediation guide
🟠 High ⏱ 15–60 min Last verified: 25 May 2026 Affected versions: Debian 11 📖 ~4 min read • Source: Debian Security Tracker Related CVEs: CVE-2019-11471 CVE-2020-19498 CVE-2020-19499 CVE-2020-23109 CVE-2023-0996 CVE-2023-29659 CVE-2023-49463 CVE-2024-25269 +11 more Upstream summary: libheif 1.4.0 has a use-after-free in heif::HeifContext::Image::set_alpha_channel in heif_context.h because heif_context.cc mishandles references to non-existing alpha images. […]