Stay Secure with the Latest Linux Advisories

security advisorycriticaldebian

Debian 11 Exim4 Critical Update DLA-4615-1 CVE-2026-48840

Warisjeet Singh discovered that Exim, a mail transport agent, does not properly handle PROXY frames whose declared payload length is too short for the claimed address family, which may result in information disclosure in configurations with SUPPORT_PROXY and 'host_proxy' set. For Debian 11 bullseye, this problem has been fixed in version. Debian LTS Advisory DLA-4615-1 This email address is being protected from spambots. You need JavaScript enabled to view it. https://www.debian.org/lts/security/ Thorsten Alteholz June 05, 2026 https://wiki.debian.org/LTS Package : exim4 Version : 4.94.2-7+deb11u6 CVE ID : CVE-2026-48840 Warisjeet Singh discovered that Exim, a mail transport agent, does not properly handle PROXY frames whose declared payload length is too short for the claimed address family, which may result in information disclosure in configurations with SUPPORT_PROXY and 'host_proxy' set. For Debian 11 bullseye, this problem has been fixed in version 4.94.2-7+deb11u6. We recommend that you upgrade your exim4 packages. For the detailed security status of exim4 please refer to its security tracker page at: https://security-tracker.debian.org/tracker/exim4 Further information about Debian LTS security advisories, how to apply these updates to your system and frequently asked questions can be found at: https://wiki.debian.org/LTS . Exim4 security update addresses information disclosure risk in Debian 11. Upgrade recommended to mitigate vulnerabilities.. exim4 security update, Debian 11 update, information disclosure risk, mail transport agent, system security. . Severity: Critical. LinuxSecurity.com Team

Jun 05, 2026 •Critical Debian LTS