CVE-2026-94054
exim4: Exim before 4.100.1, when Proxy-Protocol is used with an attacker-controlled proxy, has an out-of-bounds write.
CVE-2026-94054 is fixed in 17 products on 1 platform, first by exim4 4.99.1-1ubuntu1.5, released September 19, 2026. It is not reported as exploited. Patch Radar priority: Routine.
Routine
CVSS
5.3
medium
Exploitation
None reported
No vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0027
19th percentile
Exim before 4.100.1, when Proxy-Protocol is used with an attacker-controlled proxy, has an out-of-bounds write.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| exim · Fedora 43 | 4.100.1-1.fc43 | FEDORA-2026-D202B74C6A | Oct 6, 2026 |
| exim-clamav · Fedora 43 | 4.100.1-1.fc43 | FEDORA-2026-D202B74C6A | Oct 6, 2026 |
| exim-debuginfo · Fedora 43 | 4.100.1-1.fc43 | FEDORA-2026-D202B74C6A | Oct 6, 2026 |
| exim-debugsource · Fedora 43 | 4.100.1-1.fc43 | FEDORA-2026-D202B74C6A | Oct 6, 2026 |
| exim-greylist · Fedora 43 | 4.100.1-1.fc43 | FEDORA-2026-D202B74C6A | Oct 6, 2026 |
| exim-mon · Fedora 43 | 4.100.1-1.fc43 | FEDORA-2026-D202B74C6A | Oct 6, 2026 |
| exim-mon-debuginfo · Fedora 43 | 4.100.1-1.fc43 | FEDORA-2026-D202B74C6A | Oct 6, 2026 |
| exim-mysql · Fedora 43 | 4.100.1-1.fc43 | FEDORA-2026-D202B74C6A | Oct 6, 2026 |
| exim-mysql-debuginfo · Fedora 43 | 4.100.1-1.fc43 | FEDORA-2026-D202B74C6A | Oct 6, 2026 |
| exim-pgsql · Fedora 43 | 4.100.1-1.fc43 | FEDORA-2026-D202B74C6A | Oct 6, 2026 |
| exim-pgsql-debuginfo · Fedora 43 | 4.100.1-1.fc43 | FEDORA-2026-D202B74C6A | Oct 6, 2026 |
| exim4 · Debian 13.5 (trixie) | 4.98.2-1+deb13u5 | DEBIAN-CVE-2026-94054 | Sep 25, 2026 |
| exim4 · Debian 14 | 4.100.1-1 | DEBIAN-CVE-2026-94054 | Sep 25, 2026 |
| exim4 · Ubuntu 22.04.1 LTS (jammy) | 4.95-4ubuntu2.12 | exim4 4.95-4ubuntu2.12 | Sep 29, 2026 |
| exim4 · Ubuntu 24.04.5 LTS (noble) | 4.97-4ubuntu4.8 | exim4 4.97-4ubuntu4.8 | Sep 29, 2026 |
| exim4 · Ubuntu 26.04.1 LTS (resolute) | 4.99.1-1ubuntu1.5 | exim4 4.99.1-1ubuntu1.5 | Sep 19, 2026 |
| exim4-base · Ubuntu 22.04.1 LTS (jammy) | 4.95-4ubuntu2.12 | exim4-base 4.95-4ubuntu2.12 | Sep 29, 2026 |
| exim4-base · Ubuntu 24.04.5 LTS (noble) | 4.97-4ubuntu4.8 | exim4-base 4.97-4ubuntu4.8 | Sep 29, 2026 |
| exim4-base · Ubuntu 26.04.1 LTS (resolute) | 4.99.1-1ubuntu1.5 | exim4-base 4.99.1-1ubuntu1.5 | Sep 19, 2026 |
| exim4-config · Ubuntu 22.04.1 LTS (jammy) | 4.95-4ubuntu2.12 | exim4-config 4.95-4ubuntu2.12 | Sep 29, 2026 |
| exim4-config · Ubuntu 24.04.5 LTS (noble) | 4.97-4ubuntu4.8 | exim4-config 4.97-4ubuntu4.8 | Sep 29, 2026 |
| exim4-config · Ubuntu 26.04.1 LTS (resolute) | 4.99.1-1ubuntu1.5 | exim4-config 4.99.1-1ubuntu1.5 | Sep 19, 2026 |
| exim4-daemon-heavy · Ubuntu 22.04.1 LTS (jammy) | 4.95-4ubuntu2.12 | exim4-daemon-heavy 4.95-4ubuntu2.12 | Sep 29, 2026 |
| exim4-daemon-heavy · Ubuntu 24.04.5 LTS (noble) | 4.97-4ubuntu4.8 | exim4-daemon-heavy 4.97-4ubuntu4.8 | Sep 29, 2026 |
| exim4-daemon-heavy · Ubuntu 26.04.1 LTS (resolute) | 4.99.1-1ubuntu1.5 | exim4-daemon-heavy 4.99.1-1ubuntu1.5 | Sep 19, 2026 |
| exim4-daemon-light · Ubuntu 22.04.1 LTS (jammy) | 4.95-4ubuntu2.12 | exim4-daemon-light 4.95-4ubuntu2.12 | Sep 29, 2026 |
| exim4-daemon-light · Ubuntu 24.04.5 LTS (noble) | 4.97-4ubuntu4.8 | exim4-daemon-light 4.97-4ubuntu4.8 | Sep 29, 2026 |
| exim4-daemon-light · Ubuntu 26.04.1 LTS (resolute) | 4.99.1-1ubuntu1.5 | exim4-daemon-light 4.99.1-1ubuntu1.5 | Sep 19, 2026 |
| eximon4 · Ubuntu 22.04.1 LTS (jammy) | 4.95-4ubuntu2.12 | eximon4 4.95-4ubuntu2.12 | Sep 29, 2026 |
| eximon4 · Ubuntu 24.04.5 LTS (noble) | 4.97-4ubuntu4.8 | eximon4 4.97-4ubuntu4.8 | Sep 29, 2026 |
| eximon4 · Ubuntu 26.04.1 LTS (resolute) | 4.99.1-1ubuntu1.5 | eximon4 4.99.1-1ubuntu1.5 | Sep 19, 2026 |
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