Description
The uloc_acceptLanguageFromHTTP function in common/uloc.cpp in International Components for Unicode (ICU) through 57.1 for C/C++ does not ensure that there is a '\0' character at the end of a certain temporary array, which allows remote attackers to cause a denial of service (out-of-bounds read) or possibly have unspecified other impact via a call with a long httpAcceptLanguage argument.
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.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | icu | 57.1-4 | — |
| Debian 13 | icu | 57.1-4 | — |
| Debian 12 | icu | 57.1-4 | — |
| Debian 8 | icu | 52.1-8+deb8u4 | DSA-3725-1 |
| Debian 7 | icu | 4.8.1.1-12+deb7u5 | DLA-615-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 16.04 LTS | icu | 55.1-7ubuntu0.1 | USN-3227-1 |
| Ubuntu 14.04 LTS | icu | 52.1-3ubuntu0.5 | USN-3227-1 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP3 | icu | 52.1-8.7.1 | SUSE-SU-2018:1401-1 |
| SLES 12 SP2 | icu | 52.1-8.7.1 | SUSE-SU-2018:1401-2, SUSE-SU-2018:1401-1 |
| SLES 12 SP1 | icu | 52.1-8.7.1 | SUSE-SU-2018:1401-1 |
| SLES 12 | icu | 52.1-8.7.1 | SUSE-SU-2018:1401-1 |
| SLES 11 SP4 | icu | 4.0-47.6.1 | SUSE-SU-2018:1602-1 |
Show 6 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 12 SP3 | icu | 52.1-8.7.1 | SUSE-SU-2018:1401-1 |
| SLES for SAP 12 SP2 | icu | 52.1-8.7.1 | SUSE-SU-2018:1401-1 |
| SLES for SAP 12 SP1 | icu | 52.1-8.7.1 | SUSE-SU-2018:1401-1 |
| SLES for SAP 11 SP4 | icu | 4.0-47.6.1 | SUSE-SU-2018:1602-1 |
| SUSE OpenStack Cloud 7 | icu | 52.1-8.7.1 | SUSE-SU-2018:1401-1 |
| SUSE Enterprise Storage 4 | icu | 52.1-8.7.1 | SUSE-SU-2018:1401-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | icu | 57.1-r1 | — |
| Alpine v3.23 | icu | 57.1-r1 | — |
| Alpine v3.22 | icu | 57.1-r1 | — |
| Alpine v3.21 | icu | 57.1-r1 | — |
| Alpine v3.20 | icu | 57.1-r1 | — |
Show 16 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | icu | 57.1-r1 | — |
| Alpine v3.18 | icu | 57.1-r1 | — |
| Alpine v3.17 | icu | 57.1-r1 | — |
| Alpine v3.16 | icu | 57.1-r1 | — |
| Alpine v3.15 | icu | 57.1-r1 | — |
| Alpine v3.14 | icu | 57.1-r1 | — |
| Alpine v3.13 | icu | 57.1-r1 | — |
| Alpine v3.12 | icu | 57.1-r1 | — |
| Alpine v3.11 | icu | 57.1-r1 | — |
| Alpine v3.10 | icu | 57.1-r1 | — |
| Alpine v3.9 | icu | 57.1-r1 | — |
| Alpine v3.8 | icu | 57.1-r1 | — |
| Alpine v3.7 | icu | 57.1-r1 | — |
| Alpine v3.6 | icu | 57.1-r1 | — |
| Alpine v3.5 | icu | 57.1-r1 | — |
| Alpine v3.4 | icu | 57.1-r1 | — |
Advisories 7
- USN-3227-1 icu vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- DLA-615-1 icu - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-3725-1 icu - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2018:1602-1 Security update for icu SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:1401-1 Security update for icu SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:1401-2 Security update for icu SUSE / openSUSE Security Updates · Feb 4, 2026
- WID-SEC-2025-1660 Oracle Utilities: Mehrere Schwachstellen BSI CERT-Bund (WID) · Jul 28, 2025
References
- http://git.php.net/?p=php-src.git%3Ba=commit%3Bh=aa82e99ed8003c01f1ef4f0940e56b85c5b032d4
- https://bugs.php.net/72533
- GLSA-201701-58 vendor-advisory
- [oss-security] 20160724 Re: Fwd: CVE for PHP 5.5.38 issues mailing-list
- 92127 vdb-entry
- https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html