The stringprep_utf8_nfkc_normalize function in lib/nfkc.c in libidn before 1.33 allows context-dependent attackers to cause a denial of service (out-of-bounds read and crash) via crafted UTF-8 data.
CVSS Details
- CVSS 3.1 Base Score: 7.5
- CVSS 3.0 Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alpine Linux | — | Upgrade libidn | Aug 30, 2017 | Sep 7, 2016 |
| Debian | — | Upgrade libidn | Sep 2, 2016 | Sep 1, 2016 |
| Freebsd | — | Upgrade libidn | Dec 10, 2025 | Jul 31, 2016 |
| Gentoo Linux | — | Upgrade sys-libs/glibc. | Aug 16, 2019 | Sep 7, 2016 |
| Huawei Euleros 2_0_sp2 | — | Upgrade libidn | Dec 4, 2019 | Sep 7, 2016 |
| Huawei Euleros 2_0_sp3 | — | Upgrade libidn | Sep 25, 2019 | Sep 7, 2016 |
| Huawei Euleros 2_0_sp5 | — | Upgrade libidn | Nov 19, 2019 | Sep 7, 2016 |
| Oracle Solaris | — | Upgrade library/libidn to version 1.33-0.175.3.12.0.2.0 on Solaris 11.3 | May 29, 2017 | Sep 7, 2016 |
| Redhat_linux | — | No solution exists | Jul 9, 2025 | Jan 14, 2016 |
| Suse | — | Upgrade libidn-x86Upgrade libidn11-32bitUpgrade libidn-develUpgrade libidn2-develUpgrade libidnUpgrade libidn-32bitUpgrade libidn2-0Upgrade libidn-toolsUpgrade sles12-docker-imageUpgrade libidn11Upgrade sles12sp1-docker-imageUpgrade libidn2-0-32bit | Sep 7, 2016 | Sep 7, 2016 |
| Ubuntu | — | Upgrade libidn11 | Aug 24, 2016 | Aug 24, 2016 |
Prioritise with Active Threat Intelligence
With curated Threat Intelligence, you can see which vulnerabilities truly put you at risk, prioritize what matters most, and act before attackers do.
Explore Intelligence Hub