Critical PHP Vulnerabilities in Ubuntu 26.04 LTS Lead to Denial of Service Risks

Critical PHP Vulnerabilities in Ubuntu 26.04 LTS Lead to Denial of Service Risks

First seen 20 Jul 2026, 23:09 UTC •UbuntuLinuxsecurity •79% similarity •72.0

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On July 20, 2026, multiple vulnerabilities in PHP were disclosed, affecting Ubuntu 26.04 LTS. The vulnerabilities include a NULL pointer dereference (CVE-2026-12184) and a buffer allocation flaw in the OpenSSL extension (CVE-2026-14355). Both issues could lead to denial of service attacks or potentially allow arbitrary code execution. The vulnerabilities were confirmed to impact various PHP versions, including 8.5, 8.3, and 8.1. Users are advised to update their systems to mitigate these risks. The vulnerabilities were published on July 3, 2026. The PHP issues have been addressed in recent security updates. Administrators are encouraged to apply the patches immediately to ensure system security.

Key Points: • PHP vulnerabilities could lead to denial of service or arbitrary code execution. • Affected systems include Ubuntu 26.04 LTS with PHP versions 8.5, 8.3, and 8.1. • Immediate system updates are recommended to mitigate the identified risks.

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Timeline

2026-07-03
CVE-2026-12184 and CVE-2026-14355 published
Two critical vulnerabilities in PHP were published, affecting multiple versions and leading to potential denial of service.
Ubuntu
2026-07-20
Security advisory released for PHP vulnerabilities
Ubuntu issued a security notice detailing vulnerabilities in PHP that could lead to denial of service and arbitrary code execution.
Linuxsecurity
2026-07-20
Patch released for affected PHP versions
Updates were made available for PHP versions 8.5, 8.3, and 8.1 to address the vulnerabilities.
Linuxsecurity

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