CVE-2018-10546: canonical ubuntu_linux Loop with Unreachable Exit Condition
Vulnerability summary
CVE-2018-10546 is a high (CVSS 7.5) Loop with Unreachable Exit Condition vulnerability in canonical ubuntu_linux. EPSS estimates a 9.78% chance of exploitation in the next 30 days, higher than 95.5% of scored vulnerabilities.
Severe, CVSS 7.5 (NVD); no exploitation reported by the 5 checked sources; EPSS 10% (FIRST, 03-11-2026)
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 8 · Related 4Timeline
- 29-04-2018PublishedVulnerability first disclosed.
- 05-08-2024Last modifiedVulnerability information updated.
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.
CVSS metrics
4 scores · 3 sources · 2 versions- OSV · UbuntuEcosystem advisory · calculated7.5HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- OSV · AlpineEcosystem advisory · calculated7.5HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS trend
Probability
9.78%
Chance of exploitation in the next 30 days
Percentile
96%
Versus all other CVEs
30-day change
Decrease -0.18 pp
From 9.96% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.
Ubuntu3 products
- php5< 5.5.9+dfsg-1ubuntu4.25
- php7.0< 7.0.30-0ubuntu0.16.04.1
- php7.2< 7.2.5-0ubuntu0.18.04.1
Alpine1 product
- php7< 7.2.5-r0 | < 7.1.17-r0
Canonical1 product
- ubuntu_linuxEOL14.04 | 16.04 | 17.10 | 18.04
Debian1 product
- debian_linuxEOL8.0 | 9.0
Netapp1 product
Php1 product
- php< 5.6.36 | ≥ 7.0.0, < 7.0.30 | ≥ 7.1.0, < 7.1.17 | ≥ 7.2.0, < 7.2.5
6 vendors · 8 products
References
16 linksShow all 16 references
lists.debian.org/debian-lts-announce/2018/06/msg00005.htmlMailing ListX Refsource MLISTThird Party Advisory