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expat: libexpat: Denial of Service due to incorrect Unicode surrogate handling

🗓️ 14 Aug 2026 14:53:25Reported by RedHatType 
redhat
 redhat
🔗 access.redhat.com👁 14 Views

libexpat _toUtf16 mishandles Unicode surrogates causing DoS via infinite loop.

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OSOS VersionArchitecturePackagePackage VersionFilename
Red Hat Hardened Imagesanyaarch64expat2.8.3-0.1.hum1expat-2.8.3-0.1.hum1.aarch64.rpm
Red Hat Hardened Imagesanyx86_64expat2.8.3-0.1.hum1expat-2.8.3-0.1.hum1.x86_64.rpm

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17 Aug 2026 15:29Current
5.3Medium risk
Vulners AI Score5.3
CVSS 3.16.2
EPSS0.00176
SSVC
14