Description
An issue was discovered in PHP before 5.6.36, 7.0.x before 7.0.30, 7.1.x before 7.1.17, and 7.2.x before 7.2.5. An infinite loop exists in ext/iconv/iconv.c because the iconv stream filter does not reject invalid multibyte sequences.
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 9 | php7.0 | 7.0.30-0+deb9u1 | DSA-4240-1 |
| Debian 8 | php5 | 5.6.36+dfsg-0+deb8u1 | DLA-1397-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 18.04 LTS | php7.2 | 7.2.5-0ubuntu0.18.04.1 | USN-3646-1 |
| Ubuntu 16.04 LTS | php7.0 | 7.0.30-0ubuntu0.16.04.1 | USN-3646-1 |
| Ubuntu 14.04 LTS | php5 | 5.5.9+dfsg-1ubuntu4.25 | USN-3646-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 3 | rh-php71-php +27 | 7.1.30-1.el7 | RHSA-2019:2519 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP3 | php5 | 5.5.14-109.27.2 | SUSE-SU-2018:1291-1 |
| SLES 12 SP3 | php7 | 7.0.7-50.38.2 | SUSE-SU-2018:1176-1 |
| SLES 12 | php5 | 5.5.14-109.27.2 | SUSE-SU-2018:1291-1 |
| SLES 12 | php7 | 7.0.7-50.38.2 | SUSE-SU-2018:1176-1 |
| SLES 11 SP4 | php53 | 5.3.17-112.23.1 | SUSE-SU-2018:1294-1 |
| SLES 11 SP3 | php53 | 5.3.17-112.23.1 | SUSE-SU-2018:1294-1 |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 11 SP4 | php53 | 5.3.17-112.23.1 | SUSE-SU-2018:1294-1 |
| SUSE Linux Enterprise Point of Sale 11 SP3 | php53 | 5.3.17-112.23.1 | SUSE-SU-2018:1294-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.15 | php7 | 7.2.5-r0 | — |
| Alpine v3.14 | php7 | 7.2.5-r0 | — |
| Alpine v3.13 | php7 | 7.2.5-r0 | — |
| Alpine v3.12 | php7 | 7.2.5-r0 | — |
| Alpine v3.11 | php7 | 7.2.5-r0 | — |
Show 4 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.10 | php7 | 7.2.5-r0 | — |
| Alpine v3.9 | php7 | 7.2.5-r0 | — |
| Alpine v3.8 | php7 | 7.2.5-r0 | — |
| Alpine v3.7 | php7 | 7.1.17-r0 | — |
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.
GitHub 1 repository
-
dsfau/CVE-2018-10546 ★ 0 · May 3, 2018
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
Advisories 7
- RHSA-2019:2519 Red Hat Security Advisory: rh-php71-php security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- USN-3646-1 php5, php7.0, php7.1, php7.2 vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- DSA-4240-1 php7.0 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-1397-1 php5 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2018:1294-1 Security update for php53 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:1291-1 Security update for php5 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:1176-1 Security update for php7 SUSE / openSUSE Security Updates · May 2, 2025
References
- 104019 vdb-entry
- 1040807 vdb-entry
- https://bugs.php.net/bug.php?id=76249
- DSA-4240 vendor-advisory
- https://www.tenable.com/security/tns-2018-12
- USN-3646-1 vendor-advisory
- http://php.net/ChangeLog-5.php
- http://php.net/ChangeLog-7.php
- GLSA-201812-01 vendor-advisory
- https://security.netapp.com/advisory/ntap-20180607-0003/
- [debian-lts-announce] 20180626 [SECURITY] [DLA 1397-1] php5 security update mailing-list
- RHSA-2019:2519 vendor-advisory