CVE-2025-21605 · cross-distro fix matrix

CVE-2025-21605: Redis is an open source, in-memory database that persists on disk. In versions starting at 2.6 and prior to 7.4.3, An unauthenticated client can cause unlimited growth of output buffers, until the server runs out of memory or is killed. By default, the Redis configuration does not limit the output b

Affects 8 Linux releases across 15 (distro × package) combinations.

Fix per ecosystem

Each block below is a distro release where CVE-2025-21605 has a known fix. Run the listed command on that distro to remediate.

Debian bullseye

Source: Debian Security Tracker

redis→ fixed in5:6.0.16-1+deb11u6urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y redis
```

Debian bookworm

Source: Debian Security Tracker

redis→ fixed in5:7.0.15-1~deb12u4urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y redis
```

Debian trixie

Source: Debian Security Tracker

redis→ fixed in5:7.0.15-3.1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y redis
```
valkey→ fixed in8.1.1+dfsg1-1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y valkey
```

Alpine v3.20

Source: Alpine secdb

valkey→ fixed in7.2.9-r0
```
apk update && apk add --upgrade valkey
```
redict→ fixed in7.3.3-r0
```
apk update && apk add --upgrade redict
```
redis→ fixed in7.2.8-r0
```
apk update && apk add --upgrade redis
```

Alpine v3.21

Source: Alpine secdb

valkey→ fixed in7.2.9-r0
```
apk update && apk add --upgrade valkey
```
redict→ fixed in7.3.3-r0
```
apk update && apk add --upgrade redict
```
redis→ fixed in7.2.8-r0
```
apk update && apk add --upgrade redis
```

Alpine edge

Source: Alpine secdb

valkey→ fixed in7.2.9-r0
```
apk update && apk add --upgrade valkey
```
redict→ fixed in7.3.3-r0
```
apk update && apk add --upgrade redict
```
redis→ fixed in8.0.0-r0
```
apk update && apk add --upgrade redis
```

Alpine v3.18

Source: Alpine secdb

redis→ fixed in7.0.15-r3
```
apk update && apk add --upgrade redis
```

Alpine v3.19

Source: Alpine secdb

redis→ fixed in7.2.8-r0
```
apk update && apk add --upgrade redis
```

Are YOU affected by CVE-2025-21605?

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

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