CVE-2026-48840
exim4: Exim 4.88 before 4.99.4, in some proxy configurations, mishandles certain short payloads, leading to disclosure of un...
CVE-2026-48840 is fixed in 6 products on 1 platform, first by exim4 4.99.1-1ubuntu1.3, released May 29, 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
0.0026
18th percentile
Exim 4.88 before 4.99.4, in some proxy configurations, mishandles certain short payloads, leading to disclosure of uninitialized stack memory values to a client.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| exim4 · Debian 12.15 (bookworm) | 4.96-15+deb12u10 | DEBIAN-CVE-2026-48840 | Jun 24, 2026 |
| exim4 · Debian 13.5 (trixie) | 4.98.2-1+deb13u3 | DEBIAN-CVE-2026-48840 | Jun 24, 2026 |
| exim4 · Debian 14 | 4.99.3-2 | DEBIAN-CVE-2026-48840 | Jun 24, 2026 |
| exim4 · Ubuntu 18.04.6 LTS (bionic) | 4.90.1-1ubuntu1.10+esm6 | exim4 4.90.1-1ubuntu1.10+esm6 | Jun 24, 2026 |
| exim4 · Ubuntu 20.04 LTS (focal) | 4.93-13ubuntu1.12+esm1 | exim4 4.93-13ubuntu1.12+esm1 | Jun 24, 2026 |
| exim4 · Ubuntu 22.04.1 LTS (jammy) | 4.95-4ubuntu2.9 | exim4 4.95-4ubuntu2.9 | Jun 24, 2026 |
| exim4 · Ubuntu 24.04.5 LTS (noble) | 4.97-4ubuntu4.6 | exim4 4.97-4ubuntu4.6 | Jun 24, 2026 |
| exim4 · Ubuntu 25.10 (questing) | 4.98.2-1ubuntu2.3 | exim4 4.98.2-1ubuntu2.3 | Jun 24, 2026 |
| exim4 · Ubuntu 26.04.1 LTS (resolute) | 4.99.1-1ubuntu1.3 | exim4 4.99.1-1ubuntu1.3 | May 29, 2026 |
| exim4-base · Ubuntu 18.04.6 LTS (bionic) | 4.90.1-1ubuntu1.10+esm6 | exim4-base 4.90.1-1ubuntu1.10+esm6 | Jun 24, 2026 |
| exim4-base · Ubuntu 20.04 LTS (focal) | 4.93-13ubuntu1.12+esm1 | exim4-base 4.93-13ubuntu1.12+esm1 | Jun 24, 2026 |
| exim4-base · Ubuntu 22.04.1 LTS (jammy) | 4.95-4ubuntu2.9 | exim4-base 4.95-4ubuntu2.9 | Jun 24, 2026 |
| exim4-base · Ubuntu 24.04.5 LTS (noble) | 4.97-4ubuntu4.6 | exim4-base 4.97-4ubuntu4.6 | Jun 24, 2026 |
| exim4-base · Ubuntu 25.10 (questing) | 4.98.2-1ubuntu2.3 | exim4-base 4.98.2-1ubuntu2.3 | Jun 24, 2026 |
| exim4-base · Ubuntu 26.04.1 LTS (resolute) | 4.99.1-1ubuntu1.3 | exim4-base 4.99.1-1ubuntu1.3 | May 29, 2026 |
| exim4-config · Ubuntu 18.04.6 LTS (bionic) | 4.90.1-1ubuntu1.10+esm6 | exim4-config 4.90.1-1ubuntu1.10+esm6 | Jun 24, 2026 |
| exim4-config · Ubuntu 20.04 LTS (focal) | 4.93-13ubuntu1.12+esm1 | exim4-config 4.93-13ubuntu1.12+esm1 | Jun 24, 2026 |
| exim4-config · Ubuntu 22.04.1 LTS (jammy) | 4.95-4ubuntu2.9 | exim4-config 4.95-4ubuntu2.9 | Jun 24, 2026 |
| exim4-config · Ubuntu 24.04.5 LTS (noble) | 4.97-4ubuntu4.6 | exim4-config 4.97-4ubuntu4.6 | Jun 24, 2026 |
| exim4-config · Ubuntu 25.10 (questing) | 4.98.2-1ubuntu2.3 | exim4-config 4.98.2-1ubuntu2.3 | Jun 24, 2026 |
| exim4-config · Ubuntu 26.04.1 LTS (resolute) | 4.99.1-1ubuntu1.3 | exim4-config 4.99.1-1ubuntu1.3 | May 29, 2026 |
| exim4-daemon-heavy · Ubuntu 18.04.6 LTS (bionic) | 4.90.1-1ubuntu1.10+esm6 | exim4-daemon-heavy 4.90.1-1ubuntu1.10+esm6 | Jun 24, 2026 |
| exim4-daemon-heavy · Ubuntu 20.04 LTS (focal) | 4.93-13ubuntu1.12+esm1 | exim4-daemon-heavy 4.93-13ubuntu1.12+esm1 | Jun 24, 2026 |
| exim4-daemon-heavy · Ubuntu 22.04.1 LTS (jammy) | 4.95-4ubuntu2.9 | exim4-daemon-heavy 4.95-4ubuntu2.9 | Jun 24, 2026 |
| exim4-daemon-heavy · Ubuntu 24.04.5 LTS (noble) | 4.97-4ubuntu4.6 | exim4-daemon-heavy 4.97-4ubuntu4.6 | Jun 24, 2026 |
| exim4-daemon-heavy · Ubuntu 25.10 (questing) | 4.98.2-1ubuntu2.3 | exim4-daemon-heavy 4.98.2-1ubuntu2.3 | Jun 24, 2026 |
| exim4-daemon-heavy · Ubuntu 26.04.1 LTS (resolute) | 4.99.1-1ubuntu1.3 | exim4-daemon-heavy 4.99.1-1ubuntu1.3 | May 29, 2026 |
| exim4-daemon-light · Ubuntu 18.04.6 LTS (bionic) | 4.90.1-1ubuntu1.10+esm6 | exim4-daemon-light 4.90.1-1ubuntu1.10+esm6 | Jun 24, 2026 |
| exim4-daemon-light · Ubuntu 20.04 LTS (focal) | 4.93-13ubuntu1.12+esm1 | exim4-daemon-light 4.93-13ubuntu1.12+esm1 | Jun 24, 2026 |
| exim4-daemon-light · Ubuntu 22.04.1 LTS (jammy) | 4.95-4ubuntu2.9 | exim4-daemon-light 4.95-4ubuntu2.9 | Jun 24, 2026 |
| exim4-daemon-light · Ubuntu 24.04.5 LTS (noble) | 4.97-4ubuntu4.6 | exim4-daemon-light 4.97-4ubuntu4.6 | Jun 24, 2026 |
| exim4-daemon-light · Ubuntu 25.10 (questing) | 4.98.2-1ubuntu2.3 | exim4-daemon-light 4.98.2-1ubuntu2.3 | Jun 24, 2026 |
| exim4-daemon-light · Ubuntu 26.04.1 LTS (resolute) | 4.99.1-1ubuntu1.3 | exim4-daemon-light 4.99.1-1ubuntu1.3 | May 29, 2026 |
| eximon4 · Ubuntu 18.04.6 LTS (bionic) | 4.90.1-1ubuntu1.10+esm6 | eximon4 4.90.1-1ubuntu1.10+esm6 | Jun 24, 2026 |
| eximon4 · Ubuntu 20.04 LTS (focal) | 4.93-13ubuntu1.12+esm1 | eximon4 4.93-13ubuntu1.12+esm1 | Jun 24, 2026 |
| eximon4 · Ubuntu 22.04.1 LTS (jammy) | 4.95-4ubuntu2.9 | eximon4 4.95-4ubuntu2.9 | Jun 24, 2026 |
| eximon4 · Ubuntu 24.04.5 LTS (noble) | 4.97-4ubuntu4.6 | eximon4 4.97-4ubuntu4.6 | Jun 24, 2026 |
| eximon4 · Ubuntu 25.10 (questing) | 4.98.2-1ubuntu2.3 | eximon4 4.98.2-1ubuntu2.3 | Jun 24, 2026 |
| eximon4 · Ubuntu 26.04.1 LTS (resolute) | 4.99.1-1ubuntu1.3 | eximon4 4.99.1-1ubuntu1.3 | May 29, 2026 |
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