DSA-6377-1 php8.4 - security update

unknownCVE-2026-14355

It was discovered that a buffer overflow in the implementation of AES Key Wrap with Padding in the openssl extension of PHP, a widely-used open source general purpose scripting language, could result in memory corruption. https://security-tracker.debian.org/tracker/DSA-6377-1

CSIRTS triage

vendor: PHP product: PHP Memory corruption

What: A buffer overflow in the OpenSSL extension could result in memory corruption.
Who is affected: Deployments of PHP 8.4.
Urgency: Remediation is urgent due to the potential for memory corruption vulnerabilities.
Action: Update to the latest version of PHP.

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

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Details

Source: Debian Security Advisories (INTL · vendor-psirt · site)
Severity: unknown
Published: 2026-07-04
Exploitation: Not in CISA KEV at last sync

Original advisory: https://lists.debian.org/debian-security-announce/2026/msg00288.html

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-2026-143550.31% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 22% of all scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
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.

unknownMultiple vulnerabilities in PHP (July 7, 2026)cert-fr-avis
medium[NEW] [medium] PHP: Multiple vulnerabilities allow denial of servicecert-bund
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
mediumCVE-2026-14355: ext/openssl: Memory corruption in openssl_encrypt with AES-WRAP-PADmsrc