USN-8564-1: PHP vulnerabilities

unknownCVE-2026-12184 CVE-2026-14355

It was discovered that PHP incorrectly handled certain TLS setup failures, resulting in a NULL pointer dereference. An attacker could possibly use this issue to cause PHP to crash, resulting in a denial of service. This issue only affected Ubuntu 26.04 LTS. (CVE-2026-12184) It was discovered that PHP contained a buffer allocation flaw in the OpenSSL extension when using the AES-WRAP-PAD algorithm. An attacker could use this issue to cause PHP to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2026-14355)

CSIRTS triage

vendor: PHP product: PHP Denial of service Remote code executionaffected: only affected Ubuntu 26.04 LTS

What: PHP has vulnerabilities that can cause crashes and potentially allow arbitrary code execution.
Who is affected: Users running PHP on Ubuntu 26.04 LTS.
Urgency: Immediate action is recommended due to the potential for denial of service and code execution.
Action: Users should update PHP to the latest version.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source: Ubuntu Security Notices (INTL · vendor-psirt · site)
Severity: unknown
Published: 2026-07-20
Exploitation: Not in CISA KEV at last sync

Original advisory: https://ubuntu.com/security/notices/USN-8564-1

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Low exploitation riskCVE-2026-143550.28% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 20% of all scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-12184	coverage & exploitation status	NVD · CVE.org
CVE-2026-14355	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

medium[NEW] [medium] PHP: Multiple vulnerabilities allow denial of servicecert-bund
mediumCVE-2026-14355: ext/openssl: Memory corruption in openssl_encrypt with AES-WRAP-PADmsrc
unknownMultiple vulnerabilities in PHP (July 7, 2026)cert-fr-avis
unknownDSA-6377-1 php8.4 - security updatedebian
mediumCVE-2026-14355: In PHP versions 8.2.* before 8.2.32, 8.3.* before 8.3.32, 8.4.* before 8.4.23, 8.5.* before 8.…nvd