CVE-2025-23419 · cross-distro fix matrix

CVE-2025-23419: When multiple server blocks are configured to share the same IP address and port, an attacker can use session resumption to bypass client certificate authentication requirements on these servers. This vulnerability arises when TLS Session Tickets https://nginx.org/en/docs/http/ngx_http_ssl_module.h

Affects 6 Linux releases across 6 (distro × package) combinations.

Fix per ecosystem

Each block below is a distro release where CVE-2025-23419 has a known fix. Run the listed command on that distro to remediate.

Debian bullseye

Source: Debian Security Tracker

nginx→ fixed in1.18.0-6.1+deb11u4urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y nginx
```

Debian bookworm

Source: Debian Security Tracker

nginx→ fixed in1.22.1-9+deb12u1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y nginx
```

Debian trixie

Source: Debian Security Tracker

nginx→ fixed in1.26.3-2urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y nginx
```

Alpine v3.20

Source: Alpine secdb

nginx→ fixed in1.26.3-r0
```
apk update && apk add --upgrade nginx
```

Alpine v3.21

Source: Alpine secdb

nginx→ fixed in1.26.3-r0
```
apk update && apk add --upgrade nginx
```

Alpine edge

Source: Alpine secdb

nginx→ fixed in1.26.3-r0
```
apk update && apk add --upgrade nginx
```

Are YOU affected by CVE-2025-23419?

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

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