CVE-2025-49844 · cross-distro fix matrix

CVE-2025-49844: It was discovered that the Lua parser incorrectly handled garbage collection

Affects 7 Linux releases across 14 (distro × package) combinations. First disclosed: 2026-05-08.

Elevated exploitation risk

FIRST EPSS puts CVE-2025-49844's probability of exploitation in the next 30 days at 86% (100th percentile of all CVEs)— well above the noise floor. Prioritize it.

EPSS:86% · 30-day exploit probability100th percentile

Fix per ecosystem

Each block below is a distro release where CVE-2025-49844 has a known fix. Run the listed command on that distro to remediate.

Ubuntu xenial

Source: Ubuntu USN

lua5.1→ fixed in5.1.5-8ubuntu1+esm1USN-8262-1
```
sudo apt-get install --only-upgrade -y lua5.1
```
liblua5.1-0→ fixed in5.1.5-8ubuntu1+esm1USN-8262-1
```
sudo apt-get install --only-upgrade -y liblua5.1-0
```
liblua5.1-0-dev→ fixed in5.1.5-8ubuntu1+esm1USN-8262-1
```
sudo apt-get install --only-upgrade -y liblua5.1-0-dev
```
lua5.1-doc→ fixed in5.1.5-8ubuntu1+esm1USN-8262-1
```
sudo apt-get install --only-upgrade -y lua5.1-doc
```

Debian bullseye

Source: Debian Security Tracker

redis→ fixed in5:6.0.16-1+deb11u8urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y redis
```

Debian bookworm

Source: Debian Security Tracker

redis→ fixed in5:7.0.15-1~deb12u6urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y redis
```

Debian trixie

Source: Debian Security Tracker

redis→ fixed in5:8.0.2-3+deb13u1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y redis
```
valkey→ fixed in8.1.1+dfsg1-3+deb13u1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y valkey
```

Alpine v3.20

Source: Alpine secdb

valkey→ fixed in7.2.11-r0
```
apk update && apk add --upgrade valkey
```

Alpine v3.21

Source: Alpine secdb

valkey→ fixed in7.2.11-r0
```
apk update && apk add --upgrade valkey
```
redis→ fixed in7.2.11-r0
```
apk update && apk add --upgrade redis
```

Alpine edge

Source: Alpine secdb

valkey→ fixed in8.1.4-r0
```
apk update && apk add --upgrade valkey
```
redict→ fixed in7.3.6-r0
```
apk update && apk add --upgrade redict
```
redis→ fixed in8.2.2-r0
```
apk update && apk add --upgrade redis
```

Are YOU affected by CVE-2025-49844?

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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