CVE-2018-19935 Null dereference in n/a

What is CVE-2018-19935?

CVE-2018-19935 is a high-severity vulnerability in Debian Debian Linux, published on 7 Dec 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

ext/imap/php_imap.c in PHP 5.x and 7.x before 7.3.0 allows remote attackers to cause a denial of service (NULL pointer dereference and application crash) via an empty string in the message argument to the imap_mail function.

Weakness: CWE-476

Which versions are affected by CVE-2018-19935?

It affects 2 products.

Products include Debian Debian Linux, Php Php.

How do I fix CVE-2018-19935?

Upgrade to a fixed version.

Is CVE-2018-19935 being exploited?

There is no known exploitation of CVE-2018-19935 in the wild and no public exploit code.

Other vulnerabilities in Debian Debian Linux

• CVE-2015-3306 ProFTPD Improper Access Control Exploited Critical 10.0
• CVE-2025-49113 RoundCube Webmail Deserialization of Untrusted Data Exploited Critical 9.9
• CVE-2026-24061 GNU InetUtils Argument Injection Exploited Critical 9.8
• CVE-2025-39682 Linux Kernel Improper Check for Unusual or Exceptional Conditions Exploited Critical 9.8
• CVE-2024-9680 Mozilla Firefox Use-After-Free Exploited Critical 9.8

All Debian Debian Linux vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as ALPINE-CVE-2018-19935, GHSA-66w4-34qw-x386, UBUNTU-CVE-2018-19935.