Home / mailings

PDF

[USN-8564-1] PHP vulnerabilities

Posted on 20 July 2026
Ubuntu Security

==========================================================================Ubuntu Security Notice USN-8564-1
July 20, 2026

php8.1, php8.3, php8.5 vulnerabilities
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 26.04 LTS
- Ubuntu 24.04 LTS
- Ubuntu 22.04 LTS

Summary:

Several security issues were fixed in PHP.

Software Description:
- php8.5: HTML-embedded scripting language interpreter
- php8.3: HTML-embedded scripting language interpreter
- php8.1: HTML-embedded scripting language interpreter

Details:

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)

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 26.04 LTS
php8.5 8.5.4-0ubuntu1.2

Ubuntu 24.04 LTS
php8.3 8.3.6-0ubuntu0.24.04.10

Ubuntu 22.04 LTS
php8.1 8.1.2-1ubuntu2.25

In general, a standard system update will make all the necessary changes.

References:
https://ubuntu.com/security/notices/USN-8564-1
CVE-2026-12184, CVE-2026-14355

Package Information:
https://launchpad.net/ubuntu/+source/php8.5/8.5.4-0ubuntu1.2
https://launchpad.net/ubuntu/+source/php8.3/8.3.6-0ubuntu0.24.04.10
https://launchpad.net/ubuntu/+source/php8.1/8.1.2-1ubuntu2.25

--===============8680113306631770083==Content-Type: application/pgp-signature; name="signature.asc"
Content-Description: OpenPGP digital signature

 

TOP