CVE catalog

CVE-2022-37452

exim4: CVE-2022-37452

Severity: Medium
Published: Aug 7, 2022, 6:15:00 PM UTC
Source: [NVD] · [CVE record]
EPSS: 3.77% · Oct 25, 2026

Exim before 4.95 has a heap-based buffer overflow for the alias list in host_name_lookup in host.c when sender_host_name is set.

Vulnerable and fixed packages

Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.

Distribution	Package	Release	Version	Status
Debian	exim4	sid	`4.100.1-4`	fixed
Debian	exim4	forky	`4.100.1-4`	fixed
Debian	exim4	trixie	`4.98.2-1+deb13u4`	fixed
Debian	exim4	trixie-security	`4.98.2-1+deb13u5`	fixed
Debian	exim4	bookworm	`4.96-15+deb12u10`	fixed
Debian	exim4	bookworm-security	`4.96-15+deb12u10`	fixed
Ubuntu	exim4	pro	`4.86-3ubuntu1`	vulnerable
Ubuntu	exim4	pro	`4.86-7ubuntu1`	vulnerable
Ubuntu	exim4	pro	`4.86-7ubuntu2`	vulnerable
Ubuntu	exim4	pro	`4.86-7ubuntu3`	vulnerable
Ubuntu	exim4	pro	`4.86.2-2ubuntu1`	vulnerable
Ubuntu	exim4	pro	`4.86.2-2ubuntu2`	vulnerable
Ubuntu	exim4	pro	`4.86.2-2ubuntu2.1`	vulnerable
Ubuntu	exim4	pro	`4.86.2-2ubuntu2.2`	vulnerable
Ubuntu	exim4	pro	`4.86.2-2ubuntu2.3`	vulnerable
Ubuntu	exim4	pro	`4.86.2-2ubuntu2.4`	vulnerable
Ubuntu	exim4	pro	`4.86.2-2ubuntu2.5`	vulnerable
Ubuntu	exim4	pro	`4.86.2-2ubuntu2.6`	vulnerable
Ubuntu	exim4	pro	`4.86.2-2ubuntu2.6+esm1`	vulnerable
Ubuntu	exim4	pro	`4.86.2-2ubuntu2.6+esm2`	fixed
Ubuntu	exim4	18.04	`4.89-5ubuntu1`	vulnerable
Ubuntu	exim4	18.04	`4.89-9ubuntu1`	vulnerable
Ubuntu	exim4	18.04	`4.89-9ubuntu2`	vulnerable
Ubuntu	exim4	18.04	`4.89-9ubuntu3`	vulnerable
Ubuntu	exim4	18.04	`4.89-9ubuntu4`	vulnerable
Ubuntu	exim4	18.04	`4.90.1-1ubuntu1`	vulnerable
Ubuntu	exim4	18.04	`4.90.1-1ubuntu1.1`	vulnerable
Ubuntu	exim4	18.04	`4.90.1-1ubuntu1.2`	vulnerable
Ubuntu	exim4	18.04	`4.90.1-1ubuntu1.3`	vulnerable
Ubuntu	exim4	18.04	`4.90.1-1ubuntu1.4`	vulnerable
Ubuntu	exim4	18.04	`4.90.1-1ubuntu1.5`	vulnerable
Ubuntu	exim4	18.04	`4.90.1-1ubuntu1.8`	vulnerable
Ubuntu	exim4	18.04	`4.90.1-1ubuntu1.9`	fixed
Ubuntu	exim4	20.04	`4.92.1-1ubuntu3`	vulnerable
Ubuntu	exim4	20.04	`4.92.1-1ubuntu4`	vulnerable
Ubuntu	exim4	20.04	`4.93~RC2-1ubuntu1`	vulnerable
Ubuntu	exim4	20.04	`4.93-9ubuntu1`	vulnerable
Ubuntu	exim4	20.04	`4.93-11ubuntu1`	vulnerable
Ubuntu	exim4	20.04	`4.93-12ubuntu1`	vulnerable
Ubuntu	exim4	20.04	`4.93-13ubuntu1`	vulnerable
Ubuntu	exim4	20.04	`4.93-13ubuntu1.1`	vulnerable
Ubuntu	exim4	20.04	`4.93-13ubuntu1.5`	vulnerable
Ubuntu	exim4	20.04	`4.93-13ubuntu1.6`	fixed
Ubuntu	exim4	pro	`4.86-3ubuntu1`	vulnerable
Ubuntu	exim4	pro	`4.86-7ubuntu1`	vulnerable
Ubuntu	exim4	pro	`4.86-7ubuntu2`	vulnerable
Ubuntu	exim4	pro	`4.86-7ubuntu3`	vulnerable
Ubuntu	exim4	pro	`4.86.2-2ubuntu1`	vulnerable
Ubuntu	exim4	pro	`4.86.2-2ubuntu2`	vulnerable
Ubuntu	exim4	pro	`4.86.2-2ubuntu2.1`	vulnerable
Ubuntu	exim4	pro	`4.86.2-2ubuntu2.2`	vulnerable
Ubuntu	exim4	pro	`4.86.2-2ubuntu2.3`	vulnerable
Ubuntu	exim4	pro	`4.86.2-2ubuntu2.4`	vulnerable
Ubuntu	exim4	pro	`4.86.2-2ubuntu2.5`	vulnerable
Ubuntu	exim4	pro	`4.86.2-2ubuntu2.6`	vulnerable
Ubuntu	exim4	pro	`4.86.2-2ubuntu2.6+esm1`	vulnerable
Ubuntu	exim4	pro	`4.86.2-2ubuntu2.6+esm2`	fixed
Ubuntu	exim4	18.04	`4.89-5ubuntu1`	vulnerable
Ubuntu	exim4	18.04	`4.89-9ubuntu1`	vulnerable
Ubuntu	exim4	18.04	`4.89-9ubuntu2`	vulnerable
Ubuntu	exim4	18.04	`4.89-9ubuntu3`	vulnerable
Ubuntu	exim4	18.04	`4.89-9ubuntu4`	vulnerable
Ubuntu	exim4	18.04	`4.90.1-1ubuntu1`	vulnerable
Ubuntu	exim4	18.04	`4.90.1-1ubuntu1.1`	vulnerable
Ubuntu	exim4	18.04	`4.90.1-1ubuntu1.2`	vulnerable
Ubuntu	exim4	18.04	`4.90.1-1ubuntu1.3`	vulnerable
Ubuntu	exim4	18.04	`4.90.1-1ubuntu1.4`	vulnerable
Ubuntu	exim4	18.04	`4.90.1-1ubuntu1.5`	vulnerable
Ubuntu	exim4	18.04	`4.90.1-1ubuntu1.8`	vulnerable
Ubuntu	exim4	18.04	`4.90.1-1ubuntu1.9`	fixed
Ubuntu	exim4	20.04	`4.92.1-1ubuntu3`	vulnerable
Ubuntu	exim4	20.04	`4.92.1-1ubuntu4`	vulnerable
Ubuntu	exim4	20.04	`4.93~RC2-1ubuntu1`	vulnerable
Ubuntu	exim4	20.04	`4.93-9ubuntu1`	vulnerable
Ubuntu	exim4	20.04	`4.93-11ubuntu1`	vulnerable
Ubuntu	exim4	20.04	`4.93-12ubuntu1`	vulnerable
Ubuntu	exim4	20.04	`4.93-13ubuntu1`	vulnerable
Ubuntu	exim4	20.04	`4.93-13ubuntu1.1`	vulnerable
Ubuntu	exim4	20.04	`4.93-13ubuntu1.5`	vulnerable
Ubuntu	exim4	20.04	`4.93-13ubuntu1.6`	fixed

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	exim4	source	sid	`4.94.2-5`	not yet assigned	Not reported	Not reported
Debian	exim4	source	forky	`4.94.2-5`	not yet assigned	Not reported	Not reported
Debian	exim4	source	trixie	`4.94.2-5`	not yet assigned	Not reported	Not reported
Debian	exim4	source	bookworm	`4.94.2-5`	not yet assigned	Not reported	Not reported
Ubuntu	exim4	deb	pro	`4.86.2-2ubuntu2.6+esm2`	Not reported	USN-5574-1	Not reported
Ubuntu	exim4	deb	18.04	`4.90.1-1ubuntu1.9`	Not reported	USN-5574-1	Not reported
Ubuntu	exim4	deb	20.04	`4.93-13ubuntu1.6`	Not reported	USN-5574-1	Not reported
Ubuntu	exim4	deb	pro	`4.86.2-2ubuntu2.6+esm2`	Not reported	UBUNTU-CVE-2022-37452	Not reported
Ubuntu	exim4	deb	18.04	`4.90.1-1ubuntu1.9`	Not reported	UBUNTU-CVE-2022-37452	Not reported
Ubuntu	exim4	deb	20.04	`4.93-13ubuntu1.6`	Not reported	UBUNTU-CVE-2022-37452	Not reported

OpenFactory catalog packages

Matching against OpenFactory catalog package versions is in progress.

[Debian 12 (Bookworm)]

[exim4]Unknown
Details (6)
- 4.96-15+deb12u10 · all · bookworm
  Fixed · Fixed: 4.94.2-5
  dsa · exim4 · debian · bookworm
- 4.96-15+deb12u10 · all · bookworm
  Fixed · Fixed: 4.94.2-5
  dsa · exim4 · debian · bookworm
- 4.98.2-1~bpo12+1 · all · bookworm-backports
  Fixed · Fixed: 4.94.2-5
  dsa · exim4 · debian · bookworm
- 4.98.2-1~bpo12+1 · all · bookworm-backports
  Fixed · Fixed: 4.94.2-5
  dsa · exim4 · debian · bookworm
- 4.96-15+deb12u10 · all · bookworm-security
  Fixed · Fixed: 4.94.2-5
  dsa · exim4 · debian · bookworm
- 4.96-15+deb12u10 · all · bookworm-security
  Fixed · Fixed: 4.94.2-5
  dsa · exim4 · debian · bookworm
[exim4-base]Unknown
Source package: [exim4]
Details (6)
- 4.96-15+deb12u10 · amd64 · bookworm
  Fixed · Fixed: 4.94.2-5
  dsa · exim4 · debian · bookworm
- 4.96-15+deb12u10 · arm64 · bookworm
  Fixed · Fixed: 4.94.2-5
  dsa · exim4 · debian · bookworm
- 4.98.2-1~bpo12+1 · amd64 · bookworm-backports
  Fixed · Fixed: 4.94.2-5
  dsa · exim4 · debian · bookworm
- 4.98.2-1~bpo12+1 · arm64 · bookworm-backports
  Fixed · Fixed: 4.94.2-5
  dsa · exim4 · debian · bookworm
- 4.96-15+deb12u10 · amd64 · bookworm-security
  Fixed · Fixed: 4.94.2-5
  dsa · exim4 · debian · bookworm
- 4.96-15+deb12u10 · arm64 · bookworm-security
  Fixed · Fixed: 4.94.2-5
  dsa · exim4 · debian · bookworm
[exim4-config]Unknown
Source package: [exim4]
Details (6)
- 4.96-15+deb12u10 · all · bookworm
  Fixed · Fixed: 4.94.2-5
  dsa · exim4 · debian · bookworm
- 4.96-15+deb12u10 · all · bookworm
  Fixed · Fixed: 4.94.2-5
  dsa · exim4 · debian · bookworm
- 4.98.2-1~bpo12+1 · all · bookworm-backports
  Fixed · Fixed: 4.94.2-5
  dsa · exim4 · debian · bookworm
- 4.98.2-1~bpo12+1 · all · bookworm-backports
  Fixed · Fixed: 4.94.2-5
  dsa · exim4 · debian · bookworm
- 4.96-15+deb12u10 · all · bookworm-security
  Fixed · Fixed: 4.94.2-5
  dsa · exim4 · debian · bookworm
- 4.96-15+deb12u10 · all · bookworm-security
  Fixed · Fixed: 4.94.2-5
  dsa · exim4 · debian · bookworm
[exim4-daemon-heavy]Unknown
Source package: [exim4]
Details (6)
- 4.96-15+deb12u10 · amd64 · bookworm
  Fixed · Fixed: 4.94.2-5
  dsa · exim4 · debian · bookworm
- 4.96-15+deb12u10 · arm64 · bookworm
  Fixed · Fixed: 4.94.2-5
  dsa · exim4 · debian · bookworm
- 4.98.2-1~bpo12+1 · amd64 · bookworm-backports
  Fixed · Fixed: 4.94.2-5
  dsa · exim4 · debian · bookworm
- 4.98.2-1~bpo12+1 · arm64 · bookworm-backports
  Fixed · Fixed: 4.94.2-5
  dsa · exim4 · debian · bookworm
- 4.96-15+deb12u10 · amd64 · bookworm-security
  Fixed · Fixed: 4.94.2-5
  dsa · exim4 · debian · bookworm
- 4.96-15+deb12u10 · arm64 · bookworm-security
  Fixed · Fixed: 4.94.2-5
  dsa · exim4 · debian · bookworm
[exim4-daemon-light]Unknown
Source package: [exim4]
Details (6)
- 4.96-15+deb12u10 · amd64 · bookworm
  Fixed · Fixed: 4.94.2-5
  dsa · exim4 · debian · bookworm
- 4.96-15+deb12u10 · arm64 · bookworm
  Fixed · Fixed: 4.94.2-5
  dsa · exim4 · debian · bookworm
- 4.98.2-1~bpo12+1 · amd64 · bookworm-backports
  Fixed · Fixed: 4.94.2-5
  dsa · exim4 · debian · bookworm
- 4.98.2-1~bpo12+1 · arm64 · bookworm-backports
  Fixed · Fixed: 4.94.2-5
  dsa · exim4 · debian · bookworm
- 4.96-15+deb12u10 · amd64 · bookworm-security
  Fixed · Fixed: 4.94.2-5
  dsa · exim4 · debian · bookworm
- 4.96-15+deb12u10 · arm64 · bookworm-security
  Fixed · Fixed: 4.94.2-5
  dsa · exim4 · debian · bookworm
[exim4-dev]Unknown
Source package: [exim4]
Details (6)
- 4.96-15+deb12u10 · amd64 · bookworm
  Fixed · Fixed: 4.94.2-5
  dsa · exim4 · debian · bookworm
- 4.96-15+deb12u10 · arm64 · bookworm
  Fixed · Fixed: 4.94.2-5
  dsa · exim4 · debian · bookworm
- 4.98.2-1~bpo12+1 · amd64 · bookworm-backports
  Fixed · Fixed: 4.94.2-5
  dsa · exim4 · debian · bookworm
- 4.98.2-1~bpo12+1 · arm64 · bookworm-backports
  Fixed · Fixed: 4.94.2-5
  dsa · exim4 · debian · bookworm
- 4.96-15+deb12u10 · amd64 · bookworm-security
  Fixed · Fixed: 4.94.2-5
  dsa · exim4 · debian · bookworm
- 4.96-15+deb12u10 · arm64 · bookworm-security
  Fixed · Fixed: 4.94.2-5
  dsa · exim4 · debian · bookworm
[eximon4]Unknown
Source package: [exim4]
Details (6)
- 4.96-15+deb12u10 · amd64 · bookworm
  Fixed · Fixed: 4.94.2-5
  dsa · exim4 · debian · bookworm
- 4.96-15+deb12u10 · arm64 · bookworm
  Fixed · Fixed: 4.94.2-5
  dsa · exim4 · debian · bookworm
- 4.98.2-1~bpo12+1 · amd64 · bookworm-backports
  Fixed · Fixed: 4.94.2-5
  dsa · exim4 · debian · bookworm
- 4.98.2-1~bpo12+1 · arm64 · bookworm-backports
  Fixed · Fixed: 4.94.2-5
  dsa · exim4 · debian · bookworm
- 4.96-15+deb12u10 · amd64 · bookworm-security
  Fixed · Fixed: 4.94.2-5
  dsa · exim4 · debian · bookworm
- 4.96-15+deb12u10 · arm64 · bookworm-security
  Fixed · Fixed: 4.94.2-5
  dsa · exim4 · debian · bookworm

Observed: Oct 23, 2026, 6:29:03 PM UTC

References

[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [OSV Package Vulnerability Database]