Skip to main content
Public proof of conceptFix available

CVE-2022-31630

A public proof of concept exists; no exploitation attested.

  • Published2022-11-14
  • Fixed in8.1.12 · 8.0.25 · 7.4.33
  • WeaknessCWE-125 · CWE-131 · CWE-190

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

In PHP versions prior to 7.4.33, 8.0.25 and 8.1.12, when using imageloadfont() function in gd extension, it is possible to supply a specially crafted font file, such as if the loaded font is used with imagechar() function, the read outside allocated buffer will be used. This can lead to crashes or disclosure of confidential information. 

Timeline

dates in UTC
  1. 2022-11-1407:15CVE publishedNVD

Versions per branch

NVD · OSV
PHP
BranchAffectedFixed in
8.1≥ 8.1.0, < 8.1.128.1.12
8.0≥ 8.0.0, < 8.0.258.0.25
7.4≥ 7.4.0, < 7.4.337.4.33

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • libzipRocky Linux:8all versions · fixed in 0:1.6.1-1.module+el8.10.0+1604+6558efc7
  • libzipRocky Linux:8all versions · fixed in 0:1.6.1-1.module+el8.10.0+1912+72767185
  • libzipRocky Linux:8all versions · fixed in 0:1.7.3-1.module+el8.6.0+790+fc63e43f
  • libzipRed Hat:enterprise_linux:8::appstreamall versions · fixed in 0:1.7.3-1.module+el8.6.0+13671+84712317and 5 other packages
  • libzipRed Hat:enterprise_linux:8::appstreamall versions · fixed in 0:1.6.1-1.module+el8.3.0+6678+b09f589eand 5 other packages
  • libzipAlmaLinux:8all versions · fixed in 1.6.1-1.module_el8.6.0+2750+78feabcband 2 other packages
  • libzipAlmaLinux:8all versions · fixed in 1.6.1-1.module_el8.6.0+3239+bedf0508and 2 other packages
  • libzipAlmaLinux:8all versions · fixed in 1.7.3-1.module_el8.6.0+2739+efabdb8fand 2 other packages

116 more package ranges on OSV.dev

Vendor advisories

  • CVE-2022-31630 Red Hat Product Security1,045 products fixed

    php: OOB read due to insufficient input validation in imageloadfont()

  • RHSA-2023:2903 Red Hat Product Security301 products fixed

    Red Hat Security Advisory: php:7.4 security update

  • RHSA-2023:2417 Red Hat Product Security258 products fixed

    Red Hat Security Advisory: php:8.1 security update

  • RHSA-2023:0965 Red Hat Product Security201 products fixed

    Red Hat Security Advisory: php security update

  • RHSA-2023:0848 Red Hat Product Security285 products fixed

    Red Hat Security Advisory: php:8.0 security update

Full record on NVD

Fix

  1. Update PHP to 8.1.12 · 8.0.25 · 7.4.33
  2. Vendor fix Red Hat Product Security RHSA-2023:2903 · 301 productsFor details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 After installing the updated packages, the httpd daemon must be restarted for the update to take effect.

Advisories and patches

Detection

read 2026-11-01 01:02 UTC
Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

  • CNACVSS 3.16.5known since 2026-10-23
  • NVDCVSS 3.17.1read 2026-10-23
  • CNAweakness (CWE)CWE-131, CWE-190known since 2026-10-23
  • NVDweakness (CWE)CWE-125read 2026-10-23
  • FIRST EPSSEPSS score1.5 %2026-11-11
  • PoC-in-GitHubproof of concept2known since 2026-11-01
  • OSVaffected packages—
  • GitHub Advisoriesadvisory—

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H
Published
2022-11-14
Last Modified
2026-06-17
NVD status
Modified
GitHub Advisory
GHSA-jw98-jrc9-mrx5

Frequently asked questions

What is CVE-2022-31630?

In PHP versions prior to 7.4.33, 8.0.25 and 8.1.12, when using imageloadfont() function in gd extension, it is possible to supply a specially crafted font file, such as if the loaded font is used with imagechar() function, the read outside allocated buffer will be used. This can lead to crashes or disclosure of confidential information. 

Is CVE-2022-31630 actively exploited?

Active exploitation of CVE-2022-31630 has not been confirmed. Its EPSS score was 1.5% on 2026-11-11, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2022-31630?

CVE-2022-31630 has a CVSS v3 base score of 7.1 (HIGH severity), with vector string CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H.

Running PHP? Hear about its next vulnerability

Surveillance reads the versions in your stack — a domain, a lockfile or a list — checks each CVE against the ranges its sources publish, and alerts you when one you run is exploited or enters CISA KEV. A version it cannot read stays « version not verified ».

Get alerts for this productCISA KEV additions, November 2026Search CVEs

No credit card required · No monthly cap on website lookups · 250 API requests/month

Go further

Related vulnerabilities

Same product first, then the same vendor advisory and the same publication week.

Back to CVE Database

Sources for this record