CVE-2023-27537 · cross-distro fix matrix

CVE-2023-27537: A double free vulnerability exists in libcurl <8.0.0 when sharing HSTS data between separate "handles". This sharing was introduced without considerations for do this sharing across separate threads but there was no indication of this fact in the documentation. Due to missing mutexes or thread locks

Affects 7 Linux releases across 7 (distro × package) combinations.

Fix per ecosystem

Each block below is a distro release where CVE-2023-27537 has a known fix. Run the listed command on that distro to remediate.

Debian bookworm

Source: Debian Security Tracker

curl→ fixed in7.88.1-7urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y curl
```

Debian trixie

Source: Debian Security Tracker

curl→ fixed in7.88.1-7urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y curl
```

Alpine v3.20

Source: Alpine secdb

curl→ fixed in8.0.0-r0
```
apk update && apk add --upgrade curl
```

Alpine v3.21

Source: Alpine secdb

curl→ fixed in8.0.0-r0
```
apk update && apk add --upgrade curl
```

Alpine edge

Source: Alpine secdb

curl→ fixed in8.0.0-r0
```
apk update && apk add --upgrade curl
```

Alpine v3.18

Source: Alpine secdb

curl→ fixed in8.0.0-r0
```
apk update && apk add --upgrade curl
```

Alpine v3.19

Source: Alpine secdb

curl→ fixed in8.0.0-r0
```
apk update && apk add --upgrade curl
```

Are YOU affected by CVE-2023-27537?

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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