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USN-5323-1: NBD vulnerabilities

14 March 2022

Several security issues were fixed in NBD.



  • nbd - Network Block Device protocol


It was discovered that NBD incorrectly handled name length fields. A remote
attacker could use this issue to cause NBD to crash, resulting in a denial
of service, or possibly execute arbitrary code.

Update instructions

The problem can be corrected by updating your system to the following package versions:

Ubuntu 21.10
Ubuntu 20.04
Ubuntu 18.04

In general, a standard system update will make all the necessary changes.