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oniguruma: Out-of-bounds stack write in onigenc_unicode_get_case_fold_codes_by_str() during regular expression compilation

🗓️ 10 Apr 2026 21:56:16Reported by RedHatType 
redhat
 redhat
🔗 access.redhat.com👁 2 Views

Oniguruma 6.2.0 causes a stack out-of-bounds write during regex compilation due to code point 0xFFFFFFFF handling.

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Packages
Refs
OSOS VersionArchitecturePackagePackage VersionFilename
Red Hat Hardened Imagesanyaarch64oniguruma6.9.10-4.1.hum1oniguruma-6.9.10-4.1.hum1.aarch64.rpm
Red Hat Hardened Imagesanyx86_64oniguruma6.9.10-4.1.hum1oniguruma-6.9.10-4.1.hum1.x86_64.rpm

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19 Jul 2026 21:44Current
7.1High risk
Vulners AI Score7.1
CVSS 27.5
CVSS 39.8
EPSS0.0308
2