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CVE-2018-10546

28
FAUCET Score

CVE-2018-10546 describes an infinite loop vulnerability in PHP versions prior to 5.6.36, 7.0.30, 7.1.17, and 7.2.5, specifically within the iconv stream filter's handling of invalid multibyte sequences. This high-severity vulnerability (CVSS 7.5) can be exploited remotely with low attack complexity, leading to a denial of service. While it has a high FAUCET Risk Score, there is no evidence of active exploitation, public exploit code, or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
< 5.6.36CPE matchmatch criteria
cpe:2.3:a:php:php:*:*:*:*:*:*:*:*
>= 7.0.0, < 7.0.30CPE matchmatch criteria
cpe:2.3:a:php:php:*:*:*:*:*:*:*:*
>= 7.1.0, < 7.1.17CPE matchmatch criteria
cpe:2.3:a:php:php:*:*:*:*:*:*:*:*
>= 7.2.0, < 7.2.5CPE matchmatch criteria
cpe:2.3:a:php:php:*:*:*:*:*:*:*:*
14.04CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*

CVSS Data

CVSS version used by this source: 3.0

7.5HIGH

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
10.43%
Probability of exploitation in next 30 days
EPSS Percentile
95.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.1043 is in the 93rd percentile among its peer group of 51,553 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (9)

redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 7Fixed in: rh-php71-php-0:7.1.30-1.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 7.4 EUSFixed in: rh-php71-php-0:7.1.30-1.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 7.5 EUSFixed in: rh-php71-php-0:7.1.30-1.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 7.6 EUSFixed in: rh-php71-php-0:7.1.30-1.el7
View patch
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: php
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: php53
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: php
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: php
redhatend of lifevia redhat_api
Product: Red Hat Software CollectionsFixed in: rh-php70-php

Vendor Advisories (1)

redhatCVE-2018-10546Moderate

php: Infinite loop in ext/iconv/iconv.c when using stream filter with convert.incov on invalid sequence leads to denial-of-service

Apr 26, 2018

References

php.net / ChangeLog-5.php
PatchVendor Advisory
php.net / ChangeLog-7.php
PatchVendor Advisory
access.redhat.com / errata/RHSA-2019:2519
bugs.php.net / bug.php
Issue TrackingPatchVendor Advisory
lists.debian.org / debian-lts-announce/2018/06/msg00005.html
Mailing ListThird Party Advisory
security.gentoo.org / glsa/201812-01
Third Party Advisory
security.netapp.com / advisory/ntap-20180607-0003
Third Party Advisory
usn.ubuntu.com / 3646-1
Third Party Advisory
debian.org / security/2018/dsa-4240
Third Party Advisory
tenable.com / security/tns-2018-12
Third Party Advisory
securityfocus.com / bid/104019
Third Party AdvisoryVDB Entry
securitytracker.com / id/1040807
Third Party AdvisoryVDB Entry