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PHP: PHP: Denial of Service via improper handling of signed characters in ctype functions

🗓️ 06 May 2026 12:25:50Reported by RedHatType 
redhat
 redhat
🔗 access.redhat.com👁 19 Views

PHP flaw passes signed chars to ctype functions, risking negative memory access and denial of service.

Related
Packages
Refs
OSOS VersionArchitecturePackagePackage VersionFilename
Red Hat Hardened Imagesanyaarch64php8.5.6-1.hum1php-8.5.6-1.hum1.aarch64.rpm
Red Hat Hardened Imagesanyx86_64php8.5.6-1.hum1php-8.5.6-1.hum1.x86_64.rpm
Red Hat Hardened Imagesanyaarch64php-bcmath8.5.6-1.hum1php-bcmath-8.5.6-1.hum1.aarch64.rpm
Red Hat Hardened Imagesanyx86_64php-bcmath8.5.6-1.hum1php-bcmath-8.5.6-1.hum1.x86_64.rpm
Red Hat Hardened Imagesanyaarch64php-cli8.5.6-1.hum1php-cli-8.5.6-1.hum1.aarch64.rpm
Red Hat Hardened Imagesanyx86_64php-cli8.5.6-1.hum1php-cli-8.5.6-1.hum1.x86_64.rpm
Red Hat Hardened Imagesanyaarch64php-common8.5.6-1.hum1php-common-8.5.6-1.hum1.aarch64.rpm
Red Hat Hardened Imagesanyx86_64php-common8.5.6-1.hum1php-common-8.5.6-1.hum1.x86_64.rpm
Red Hat Hardened Imagesanyaarch64php-dba8.5.6-1.hum1php-dba-8.5.6-1.hum1.aarch64.rpm
Red Hat Hardened Imagesanyx86_64php-dba8.5.6-1.hum1php-dba-8.5.6-1.hum1.x86_64.rpm
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05 Oct 2026 17:57Current
7High risk
Vulners AI Score7
CVSS 3.17.5
CVSS 46.3
EPSS0.00405
SSVC
19