RHBA-2025:9437 - Bug Fix Advisory

Topic

An update for passt is now available for Red Hat Enterprise Linux 9.

Description

passt implements a translation layer between a Layer-2 network interface and native Layer-4 sockets (TCP, UDP, ICMP/ICMPv6 echo) on a host. It doesn't require any capabilities or privileges, and it can be used as a simple replacement for Slirp. pasta (same binary as passt, different command) offers equivalent functionality, for network namespaces: traffic is forwarded using a tap interface inside the namespace, without the need to create further interfaces on the host, hence not requiring any capabilities or privileges.

Bug Fix(es):

• passt vhostuser interface should mostly keep working or fail gracefully on migration without passt-repair process [rhel-9.6.z] (JIRA:RHEL-82211)
• passt's socket for TCP connection repair helper can't be easily used with libvirt-based migration [rhel-9.6.z] (JIRA:RHEL-83978)
• Migration of TCP connections fails to restore timestamps (if used) and MSS value [rhel-9.6.z] (JIRA:RHEL-84156)
• https://bugs.passt.top/show_bug.cgi?id=114 [rhel-9.6.z] (JIRA:RHEL-84247)
• https://github.com/containers/podman/issues/23686#issuecomment-2780630203 [rhel-9.6.z] (JIRA:RHEL-86759)

Solution

For details on how to apply this update, which includes the changes described in this advisory, refer to:

https://access.redhat.com/articles/11258

Affected Products

• Red Hat Enterprise Linux for x86_64 9 x86_64
• Red Hat Enterprise Linux for x86_64 - Extended Update Support 9.6 x86_64
• Red Hat Enterprise Linux Server - AUS 9.6 x86_64
• Red Hat Enterprise Linux for IBM z Systems 9 s390x
• Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 9.6 s390x
• Red Hat Enterprise Linux for Power, little endian 9 ppc64le
• Red Hat Enterprise Linux for Power, little endian - Extended Update Support 9.6 ppc64le
• Red Hat Enterprise Linux for ARM 64 9 aarch64
• Red Hat Enterprise Linux for ARM 64 - Extended Update Support 9.6 aarch64
• Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions 9.6 ppc64le
• Red Hat Enterprise Linux for x86_64 - Update Services for SAP Solutions 9.6 x86_64
• Red Hat Enterprise Linux for ARM 64 - 4 years of updates 9.6 aarch64
• Red Hat Enterprise Linux for IBM z Systems - 4 years of updates 9.6 s390x

Fixes

CVEs

(none)

References

(none)