Description
idn in libidn before 1.33 might allow remote attackers to obtain sensitive memory information by reading a zero byte as input, which triggers an out-of-bounds read, a different vulnerability than CVE-2015-8948.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 16.04 LTS | libidn | 1.32-3ubuntu1.1 | USN-3068-1 |
| Ubuntu 14.04 LTS | libidn | 1.28-1ubuntu2.1 | USN-3068-1 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP1 | libidn | 1.28-4.1 | SUSE-SU-2016:2079-1 |
| SLES 11 SP4 | libidn | 1.10-6.1 | SUSE-SU-2016:2291-1 |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 12 SP1 | libidn | 1.28-4.1 | SUSE-SU-2016:2079-1 |
| SLES for SAP 11 SP4 | libidn | 1.10-6.1 | SUSE-SU-2016:2291-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | libidn | 1.33-r0 | — |
| Alpine v3.23 | libidn | 1.33-r0 | — |
| Alpine v3.22 | libidn | 1.33-r0 | — |
| Alpine v3.21 | libidn | 1.33-r0 | — |
| Alpine v3.20 | libidn | 1.33-r0 | — |
Show 18 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | libidn | 1.33-r0 | — |
| Alpine v3.18 | libidn | 1.33-r0 | — |
| Alpine v3.17 | libidn | 1.33-r0 | — |
| Alpine v3.16 | libidn | 1.33-r0 | — |
| Alpine v3.15 | libidn | 1.33-r0 | — |
| Alpine v3.14 | libidn | 1.33-r0 | — |
| Alpine v3.13 | libidn | 1.33-r0 | — |
| Alpine v3.12 | libidn | 1.33-r0 | — |
| Alpine v3.11 | libidn | 1.33-r0 | — |
| Alpine v3.10 | libidn | 1.33-r0 | — |
| Alpine v3.9 | libidn | 1.33-r0 | — |
| Alpine v3.8 | libidn | 1.33-r0 | — |
| Alpine v3.7 | libidn | 1.33-r0 | — |
| Alpine v3.6 | libidn | 1.33-r0 | — |
| Alpine v3.5 | libidn | 1.33-r0 | — |
| Alpine v3.4 | libidn | 1.33-r0 | — |
| Alpine v3.3 | libidn | 1.33-r0 | — |
| Alpine v3.2 | libidn | 1.33-r0 | — |
Advisories 3
- USN-3068-1 libidn vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- SUSE-SU-2016:2291-1 Security update for libidn SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2016:2079-1 Security update for libidn SUSE / openSUSE Security Updates · Feb 4, 2026
References
- [oss-security] 20160721 Re: CVE request: multiple issues fixed in GNU libidn 1.33 mailing-list
- openSUSE-SU-2016:2135 vendor-advisory
- [oss-security] 20160720 CVE request: multiple issues fixed in GNU libidn 1.33 mailing-list
- openSUSE-SU-2016:1924 vendor-advisory
- 92070 vdb-entry
- [help-libidn] 20160720 Libidn 1.33 released mailing-list
- http://git.savannah.gnu.org/cgit/libidn.git/commit/?id=5e3cb9c7b5bf0ce665b9d68f5ddf095af5c9ba60
- USN-3068-1 vendor-advisory
- [bookkeeper-issues] 20210628 [GitHub] [bookkeeper] padma81 opened a new issue #2746: Security Vulnerabilities in CentOS 7 image, Upgrade image to CentOS 8 mailing-list
- [bookkeeper-issues] 20210629 [GitHub] [bookkeeper] padma81 opened a new issue #2746: Security Vulnerabilities in CentOS 7 image, Upgrade image to CentOS 8 mailing-list