CVE-2026-45185 · cross-distro fix matrix

CVE-2026-45185: Exim before 4.99.3, in certain GnuTLS configurations, has a remotely reachable use-after-free in the BDAT body parsing path. It is triggered when a client sends a TLS close_notify mid-body during a CHUNKING transfer, followed by a final cleartext byte on the same TCP connection. This can lead to hea

Affects 3 Linux releases across 3 (distro × package) combinations.

Fix per ecosystem

Each block below is a distro release where CVE-2026-45185 has a known fix. Run the listed command on that distro to remediate.

Debian bullseye

Source: Debian Security Tracker

exim4→ fixed in4.94.2-7+deb11u5urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y exim4
```

Debian bookworm

Source: Debian Security Tracker

exim4→ fixed in4.96-15+deb12u9urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y exim4
```

Debian trixie

Source: Debian Security Tracker

exim4→ fixed in4.98.2-1+deb13u2urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y exim4
```

Are YOU affected by CVE-2026-45185?

5-second check on your actual server. Reads /etc/os-release, uname -r, and the distro's package manager; matches against this same cross-source index live.

curl https://mindsparkstack.com/scan.sh | bash

Form-based quickscan View on NVD

Continuous monitoring beats manual checking

CVE-2026-45185dropped silently in your distro's update channel. Every new CVE is the same story. StackPatch runs the matcher hourly against all 5 sources and emails the exact remediation when something new applies to one of your servers. $99 lifetime, 50 founder seats, 30-day refund.

See StackPatch ($99 lifetime)