CVE-2021-3518 · cross-distro fix matrix

CVE-2021-3518: There's a flaw in libxml2 in versions before 2.9.11. An attacker who is able to submit a crafted file to be processed by an application linked with libxml2 could trigger a use-after-free. The greatest impact from this flaw is to confidentiality, integrity, and availability.

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

Fix per ecosystem

Each block below is a distro release where CVE-2021-3518 has a known fix. Run the listed command on that distro to remediate.

Debian bullseye

Source: Debian Security Tracker

libxml2→ fixed in2.9.10+dfsg-6.6urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y libxml2
```

Debian bookworm

Source: Debian Security Tracker

libxml2→ fixed in2.9.10+dfsg-6.6urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y libxml2
```

Debian trixie

Source: Debian Security Tracker

libxml2→ fixed in2.9.10+dfsg-6.6urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y libxml2
```

Alpine v3.20

Source: Alpine secdb

libxml2→ fixed in2.9.11-r0
```
apk update && apk add --upgrade libxml2
```

Alpine v3.21

Source: Alpine secdb

libxml2→ fixed in2.9.11-r0
```
apk update && apk add --upgrade libxml2
```

Alpine edge

Source: Alpine secdb

libxml2→ fixed in2.9.11-r0
```
apk update && apk add --upgrade libxml2
```

Alpine v3.18

Source: Alpine secdb

libxml2→ fixed in2.9.11-r0
```
apk update && apk add --upgrade libxml2
```

Alpine v3.19

Source: Alpine secdb

libxml2→ fixed in2.9.11-r0
```
apk update && apk add --upgrade libxml2
```

Are YOU affected by CVE-2021-3518?

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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