CVE-2021-3979 · cross-distro fix matrix

CVE-2021-3979: A key length flaw was found in Red Hat Ceph Storage. An attacker can exploit the fact that the key length is incorrectly passed in an encryption algorithm to create a non random key, which is weaker and can be exploited for loss of confidentiality and integrity on encrypted disks.

Affects 3 Linux releases across 3 (distro × package) combinations.

Fix per ecosystem

Each block below is a distro release where CVE-2021-3979 has a known fix. Run the listed command on that distro to remediate.

Debian bullseye

Source: Debian Security Tracker

ceph→ fixed in14.2.21-1+deb11u1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y ceph
```

Debian bookworm

Source: Debian Security Tracker

ceph→ fixed in16.2.9+ds-1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y ceph
```

Debian trixie

Source: Debian Security Tracker

ceph→ fixed in16.2.9+ds-1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y ceph
```

Are YOU affected by CVE-2021-3979?

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.

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