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USN-4001-1: libseccomp vulnerability

30 May 2019

libseccomp could allow unintended access to system calls.



  • libseccomp - library for working with the Linux seccomp filter


Jann Horn discovered that libseccomp did not correctly generate 64-bit
syscall argument comparisons with arithmetic operators (LT, GT, LE, GE).
An attacker could use this to bypass intended access restrictions for
argument-filtered system calls.

Update instructions

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

Ubuntu 19.04
Ubuntu 18.10
Ubuntu 18.04
Ubuntu 16.04

This update uses a new upstream release which includes additional bug
fixes. In general, a standard system update will make all the necessary


Related notices

  • USN-4001-2: libseccomp, seccomp, libseccomp-dev, libseccomp2