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Debian Exim4 Important Information Disclosure Fix DSA-6309-1

debian
Calendar Grey May 29, 2026
Debian Logo
Debian Security Advisory DSA-6309-1 fixes Exim4 security issue causing information disclosure for users with SUPPORT_PROXY.
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...
Topics%20covered

Topics Covered

security advisory debian important information disclosure mail agent proxy frames

Summary

For the oldstable distribution (bookworm), this problem has been fixed
in version 4.96-15+deb12u10.

For the stable distribution (trixie), this problem has been fixed in
version 4.98.2-1+deb13u3.

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 Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://www.debian.org/security/



Severity
important
Lowest
Low
Medium
High
Critical

Package: exim4
CVE ID: CVE-2026-48840

Topics%20covered

Topics Covered

security advisory debian important information disclosure mail agent proxy frames

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