CVE catalog

CVE-2025-67896

Exim before 4.99.1, with certain non-default rate-limit configurations, allows a remote heap-based buffer overflow because database records are cast directly to internal structures without validation.

[CVE catalog]

Severity: High · CVSS 8.2CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H
Published: Dec 14, 2025, 4:00:24 AM UTC
Updated: Oct 14, 2026, 1:10:00 PM UTC
Source: [NVD] · [CVE record]
EPSS: 0.47% · Oct 25, 2026

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`	not affected
Debian	exim4	trixie-security	`4.98.2-1+deb13u5`	not affected
Debian	exim4	bookworm	`4.96-15+deb12u10`	not affected
Debian	exim4	bookworm-security	`4.96-15+deb12u10`	not affected
Cpe	exim	Not reported	`4.99.1`	fixed

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	exim4	source	sid	`4.99-7`	not yet assigned	Not reported	Not reported
Debian	exim4	source	forky	`4.99-7`	not yet assigned	Not reported	Not reported
Debian	exim4	source	trixie	`Not affected`	unimportant	Not reported	Not reported
Debian	exim4	source	bookworm	`Not affected`	unimportant	Not reported	Not reported
Cpe	exim	cpe	Not reported	`4.99.1`	Not reported	NVD-CVE-2025-67896	Not reported

OpenFactory catalog packages

[Debian 12 (Bookworm)]

[exim4]Not affected
Details (6)
- 4.96-15+deb12u10 · all · bookworm
  Not affected
  nvd · exim4 · debian · bookworm
- 4.96-15+deb12u10 · all · bookworm
  Not affected
  nvd · exim4 · debian · bookworm
- 4.98.2-1~bpo12+1 · all · bookworm-backports
  Not affected
  nvd · exim4 · debian · bookworm
- 4.98.2-1~bpo12+1 · all · bookworm-backports
  Not affected
  nvd · exim4 · debian · bookworm
- 4.96-15+deb12u10 · all · bookworm-security
  Not affected
  nvd · exim4 · debian · bookworm
- 4.96-15+deb12u10 · all · bookworm-security
  Not affected
  nvd · exim4 · debian · bookworm
[exim4-base]Not affected
Source package: [exim4]
Details (6)
- 4.96-15+deb12u10 · amd64 · bookworm
  Not affected
  nvd · exim4 · debian · bookworm
- 4.96-15+deb12u10 · arm64 · bookworm
  Not affected
  nvd · exim4 · debian · bookworm
- 4.98.2-1~bpo12+1 · amd64 · bookworm-backports
  Not affected
  nvd · exim4 · debian · bookworm
- 4.98.2-1~bpo12+1 · arm64 · bookworm-backports
  Not affected
  nvd · exim4 · debian · bookworm
- 4.96-15+deb12u10 · amd64 · bookworm-security
  Not affected
  nvd · exim4 · debian · bookworm
- 4.96-15+deb12u10 · arm64 · bookworm-security
  Not affected
  nvd · exim4 · debian · bookworm
[exim4-config]Not affected
Source package: [exim4]
Details (6)
- 4.96-15+deb12u10 · all · bookworm
  Not affected
  nvd · exim4 · debian · bookworm
- 4.96-15+deb12u10 · all · bookworm
  Not affected
  nvd · exim4 · debian · bookworm
- 4.98.2-1~bpo12+1 · all · bookworm-backports
  Not affected
  nvd · exim4 · debian · bookworm
- 4.98.2-1~bpo12+1 · all · bookworm-backports
  Not affected
  nvd · exim4 · debian · bookworm
- 4.96-15+deb12u10 · all · bookworm-security
  Not affected
  nvd · exim4 · debian · bookworm
- 4.96-15+deb12u10 · all · bookworm-security
  Not affected
  nvd · exim4 · debian · bookworm
[exim4-daemon-heavy]Not affected
Source package: [exim4]
Details (6)
- 4.96-15+deb12u10 · amd64 · bookworm
  Not affected
  nvd · exim4 · debian · bookworm
- 4.96-15+deb12u10 · arm64 · bookworm
  Not affected
  nvd · exim4 · debian · bookworm
- 4.98.2-1~bpo12+1 · amd64 · bookworm-backports
  Not affected
  nvd · exim4 · debian · bookworm
- 4.98.2-1~bpo12+1 · arm64 · bookworm-backports
  Not affected
  nvd · exim4 · debian · bookworm
- 4.96-15+deb12u10 · amd64 · bookworm-security
  Not affected
  nvd · exim4 · debian · bookworm
- 4.96-15+deb12u10 · arm64 · bookworm-security
  Not affected
  nvd · exim4 · debian · bookworm
[exim4-daemon-light]Not affected
Source package: [exim4]
Details (6)
- 4.96-15+deb12u10 · amd64 · bookworm
  Not affected
  nvd · exim4 · debian · bookworm
- 4.96-15+deb12u10 · arm64 · bookworm
  Not affected
  nvd · exim4 · debian · bookworm
- 4.98.2-1~bpo12+1 · amd64 · bookworm-backports
  Not affected
  nvd · exim4 · debian · bookworm
- 4.98.2-1~bpo12+1 · arm64 · bookworm-backports
  Not affected
  nvd · exim4 · debian · bookworm
- 4.96-15+deb12u10 · amd64 · bookworm-security
  Not affected
  nvd · exim4 · debian · bookworm
- 4.96-15+deb12u10 · arm64 · bookworm-security
  Not affected
  nvd · exim4 · debian · bookworm
[exim4-dev]Not affected
Source package: [exim4]
Details (6)
- 4.96-15+deb12u10 · amd64 · bookworm
  Not affected
  nvd · exim4 · debian · bookworm
- 4.96-15+deb12u10 · arm64 · bookworm
  Not affected
  nvd · exim4 · debian · bookworm
- 4.98.2-1~bpo12+1 · amd64 · bookworm-backports
  Not affected
  nvd · exim4 · debian · bookworm
- 4.98.2-1~bpo12+1 · arm64 · bookworm-backports
  Not affected
  nvd · exim4 · debian · bookworm
- 4.96-15+deb12u10 · amd64 · bookworm-security
  Not affected
  nvd · exim4 · debian · bookworm
- 4.96-15+deb12u10 · arm64 · bookworm-security
  Not affected
  nvd · exim4 · debian · bookworm
[eximon4]Not affected
Source package: [exim4]
Details (6)
- 4.96-15+deb12u10 · amd64 · bookworm
  Not affected
  nvd · exim4 · debian · bookworm
- 4.96-15+deb12u10 · arm64 · bookworm
  Not affected
  nvd · exim4 · debian · bookworm
- 4.98.2-1~bpo12+1 · amd64 · bookworm-backports
  Not affected
  nvd · exim4 · debian · bookworm
- 4.98.2-1~bpo12+1 · arm64 · bookworm-backports
  Not affected
  nvd · exim4 · debian · bookworm
- 4.96-15+deb12u10 · amd64 · bookworm-security
  Not affected
  nvd · exim4 · debian · bookworm
- 4.96-15+deb12u10 · arm64 · bookworm-security
  Not affected
  nvd · exim4 · debian · bookworm

Observed: Oct 27, 2026, 10:47:34 AM UTC

References

[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX]