Red Hat Product Errata RHBA-2026:19205 - Bug Fix Advisory
Issued:
2026-05-19
Updated:
2026-05-19

RHBA-2026:19205 - Bug Fix Advisory

Synopsis

passt bug fix and enhancement update

Type/Severity

Bug Fix Advisory

Red Hat Lightspeed patch analysis

Identify and remediate systems affected by this advisory.

View affected systems

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) and Enhancement(s):

  • pasta holds on sockets in FIN-WAIT2 state [rhel-9.8.z] (JIRA:RHEL-169637)
  • udp: Split activity timeouts for UDP flows [rhel-9.8.z] (JIRA:RHEL-169639)
  • passt: Substantial regression in TCP throughput for low, non-local RTTs (100-500?s) [rhel-9.8.z] (JIRA:RHEL-169648)

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 9.8 x86_64
  • Red Hat Enterprise Linux for IBM z Systems 9 s390x
  • Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 9.8 s390x
  • Red Hat Enterprise Linux for Power, little endian 9 ppc64le
  • Red Hat Enterprise Linux for Power, little endian - Extended Update Support 9.8 ppc64le
  • Red Hat Enterprise Linux for ARM 64 9 aarch64
  • Red Hat Enterprise Linux for ARM 64 - Extended Update Support 9.8 aarch64
  • Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions 9.8 ppc64le
  • Red Hat Enterprise Linux for x86_64 - Update Services for SAP Solutions 9.8 x86_64
  • Red Hat Enterprise Linux for ARM 64 - 4 years of updates 9.8 aarch64
  • Red Hat Enterprise Linux for IBM z Systems - 4 years of updates 9.8 s390x
  • Red Hat Enterprise Linux for x86_64 - Extended Life Cycle 9.8 x86_64
  • Red Hat Enterprise Linux for ARM 64 - Extended Life Cycle 9.8 aarch64
  • Red Hat Enterprise Linux for Power, little endian - Extended Life Cycle 9.8 ppc64le
  • Red Hat Enterprise Linux for IBM z Systems - Extended Life Cycle 9.8 s390x

Fixes

(none)

CVEs

(none)

References

(none)

Red Hat Enterprise Linux for x86_64 9

SRPM
passt-0^20251210.gd04c480-4.el9_8.src.rpm SHA-256: 5617e7327f5a90cfaceb702ce99c5ceabefad5c3e7253a2c434f791582c543f6
x86_64
passt-0^20251210.gd04c480-4.el9_8.x86_64.rpm SHA-256: 586b2b4f35c77536fd71e8a0d1f74e3feae49a23c900c317e99a465776330410
passt-debuginfo-0^20251210.gd04c480-4.el9_8.x86_64.rpm SHA-256: 33a7d27a5a4728e0e3307f9253521df56bee3c70de49cd1e2256a144e476d1bc
passt-debugsource-0^20251210.gd04c480-4.el9_8.x86_64.rpm SHA-256: 9557e13f1198ac762c8043dd8c0ef55df11980151e4510680f9eeb24f6655dd6
passt-selinux-0^20251210.gd04c480-4.el9_8.noarch.rpm SHA-256: e01918180731dc1714e566f53277ed6ef3ee70f6442ac04306e6883f68431c16

Red Hat Enterprise Linux for x86_64 - Extended Update Support 9.8

SRPM
passt-0^20251210.gd04c480-4.el9_8.src.rpm SHA-256: 5617e7327f5a90cfaceb702ce99c5ceabefad5c3e7253a2c434f791582c543f6
x86_64
passt-0^20251210.gd04c480-4.el9_8.x86_64.rpm SHA-256: 586b2b4f35c77536fd71e8a0d1f74e3feae49a23c900c317e99a465776330410
passt-debuginfo-0^20251210.gd04c480-4.el9_8.x86_64.rpm SHA-256: 33a7d27a5a4728e0e3307f9253521df56bee3c70de49cd1e2256a144e476d1bc
passt-debugsource-0^20251210.gd04c480-4.el9_8.x86_64.rpm SHA-256: 9557e13f1198ac762c8043dd8c0ef55df11980151e4510680f9eeb24f6655dd6
passt-selinux-0^20251210.gd04c480-4.el9_8.noarch.rpm SHA-256: e01918180731dc1714e566f53277ed6ef3ee70f6442ac04306e6883f68431c16

Red Hat Enterprise Linux for IBM z Systems 9

SRPM
passt-0^20251210.gd04c480-4.el9_8.src.rpm SHA-256: 5617e7327f5a90cfaceb702ce99c5ceabefad5c3e7253a2c434f791582c543f6
s390x
passt-0^20251210.gd04c480-4.el9_8.s390x.rpm SHA-256: 3fdb05f5a7bbfa6a84d3274af68b1799d1a855a77d7748b88c3d2dd60289d0ad
passt-debuginfo-0^20251210.gd04c480-4.el9_8.s390x.rpm SHA-256: ee090194e5cd99d3cb06d96d2f13b54e9685608686ac095fa0364274913c8630
passt-debugsource-0^20251210.gd04c480-4.el9_8.s390x.rpm SHA-256: c26b60ce78e80d92ee67c45886f388c1156e4c45c1b6616396082ad211e638da
passt-selinux-0^20251210.gd04c480-4.el9_8.noarch.rpm SHA-256: e01918180731dc1714e566f53277ed6ef3ee70f6442ac04306e6883f68431c16

Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 9.8

SRPM
passt-0^20251210.gd04c480-4.el9_8.src.rpm SHA-256: 5617e7327f5a90cfaceb702ce99c5ceabefad5c3e7253a2c434f791582c543f6
s390x
passt-0^20251210.gd04c480-4.el9_8.s390x.rpm SHA-256: 3fdb05f5a7bbfa6a84d3274af68b1799d1a855a77d7748b88c3d2dd60289d0ad
passt-debuginfo-0^20251210.gd04c480-4.el9_8.s390x.rpm SHA-256: ee090194e5cd99d3cb06d96d2f13b54e9685608686ac095fa0364274913c8630
passt-debugsource-0^20251210.gd04c480-4.el9_8.s390x.rpm SHA-256: c26b60ce78e80d92ee67c45886f388c1156e4c45c1b6616396082ad211e638da
passt-selinux-0^20251210.gd04c480-4.el9_8.noarch.rpm SHA-256: e01918180731dc1714e566f53277ed6ef3ee70f6442ac04306e6883f68431c16

Red Hat Enterprise Linux for Power, little endian 9

SRPM
passt-0^20251210.gd04c480-4.el9_8.src.rpm SHA-256: 5617e7327f5a90cfaceb702ce99c5ceabefad5c3e7253a2c434f791582c543f6
ppc64le
passt-0^20251210.gd04c480-4.el9_8.ppc64le.rpm SHA-256: 8fa4aeef902aa6f6b28bbdf4edbf9780ecd9d36dbbf85f741c79b7278727f576
passt-debuginfo-0^20251210.gd04c480-4.el9_8.ppc64le.rpm SHA-256: d433ac0f4a00032913b554a0667dc7ff6c8cfde4b1ca1cbfe4c432158d7eb71c
passt-debugsource-0^20251210.gd04c480-4.el9_8.ppc64le.rpm SHA-256: e2e7c4661169968de9afa1e230cb208bc3a52aeceb971aa9bd9775a2450ad61a
passt-selinux-0^20251210.gd04c480-4.el9_8.noarch.rpm SHA-256: e01918180731dc1714e566f53277ed6ef3ee70f6442ac04306e6883f68431c16

Red Hat Enterprise Linux for Power, little endian - Extended Update Support 9.8

SRPM
passt-0^20251210.gd04c480-4.el9_8.src.rpm SHA-256: 5617e7327f5a90cfaceb702ce99c5ceabefad5c3e7253a2c434f791582c543f6
ppc64le
passt-0^20251210.gd04c480-4.el9_8.ppc64le.rpm SHA-256: 8fa4aeef902aa6f6b28bbdf4edbf9780ecd9d36dbbf85f741c79b7278727f576
passt-debuginfo-0^20251210.gd04c480-4.el9_8.ppc64le.rpm SHA-256: d433ac0f4a00032913b554a0667dc7ff6c8cfde4b1ca1cbfe4c432158d7eb71c
passt-debugsource-0^20251210.gd04c480-4.el9_8.ppc64le.rpm SHA-256: e2e7c4661169968de9afa1e230cb208bc3a52aeceb971aa9bd9775a2450ad61a
passt-selinux-0^20251210.gd04c480-4.el9_8.noarch.rpm SHA-256: e01918180731dc1714e566f53277ed6ef3ee70f6442ac04306e6883f68431c16

Red Hat Enterprise Linux for ARM 64 9

SRPM
passt-0^20251210.gd04c480-4.el9_8.src.rpm SHA-256: 5617e7327f5a90cfaceb702ce99c5ceabefad5c3e7253a2c434f791582c543f6
aarch64
passt-0^20251210.gd04c480-4.el9_8.aarch64.rpm SHA-256: d40f5f216b01dd69a7ef6c8c83010c81123a9bed27fc6722bcd94a1e10a1b740
passt-debuginfo-0^20251210.gd04c480-4.el9_8.aarch64.rpm SHA-256: 25c26588b78ca84e433e3363143c81e87153db5be8bb53df151e962d82218152
passt-debugsource-0^20251210.gd04c480-4.el9_8.aarch64.rpm SHA-256: fa6ffef8c303d3bd464656d5a3313939b1e463d2f74d3e689513784de31f7c78
passt-selinux-0^20251210.gd04c480-4.el9_8.noarch.rpm SHA-256: e01918180731dc1714e566f53277ed6ef3ee70f6442ac04306e6883f68431c16

Red Hat Enterprise Linux for ARM 64 - Extended Update Support 9.8

SRPM
passt-0^20251210.gd04c480-4.el9_8.src.rpm SHA-256: 5617e7327f5a90cfaceb702ce99c5ceabefad5c3e7253a2c434f791582c543f6
aarch64
passt-0^20251210.gd04c480-4.el9_8.aarch64.rpm SHA-256: d40f5f216b01dd69a7ef6c8c83010c81123a9bed27fc6722bcd94a1e10a1b740
passt-debuginfo-0^20251210.gd04c480-4.el9_8.aarch64.rpm SHA-256: 25c26588b78ca84e433e3363143c81e87153db5be8bb53df151e962d82218152
passt-debugsource-0^20251210.gd04c480-4.el9_8.aarch64.rpm SHA-256: fa6ffef8c303d3bd464656d5a3313939b1e463d2f74d3e689513784de31f7c78
passt-selinux-0^20251210.gd04c480-4.el9_8.noarch.rpm SHA-256: e01918180731dc1714e566f53277ed6ef3ee70f6442ac04306e6883f68431c16

Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions 9.8

SRPM
passt-0^20251210.gd04c480-4.el9_8.src.rpm SHA-256: 5617e7327f5a90cfaceb702ce99c5ceabefad5c3e7253a2c434f791582c543f6
ppc64le
passt-0^20251210.gd04c480-4.el9_8.ppc64le.rpm SHA-256: 8fa4aeef902aa6f6b28bbdf4edbf9780ecd9d36dbbf85f741c79b7278727f576
passt-debuginfo-0^20251210.gd04c480-4.el9_8.ppc64le.rpm SHA-256: d433ac0f4a00032913b554a0667dc7ff6c8cfde4b1ca1cbfe4c432158d7eb71c
passt-debugsource-0^20251210.gd04c480-4.el9_8.ppc64le.rpm SHA-256: e2e7c4661169968de9afa1e230cb208bc3a52aeceb971aa9bd9775a2450ad61a
passt-selinux-0^20251210.gd04c480-4.el9_8.noarch.rpm SHA-256: e01918180731dc1714e566f53277ed6ef3ee70f6442ac04306e6883f68431c16

Red Hat Enterprise Linux for x86_64 - Update Services for SAP Solutions 9.8

SRPM
passt-0^20251210.gd04c480-4.el9_8.src.rpm SHA-256: 5617e7327f5a90cfaceb702ce99c5ceabefad5c3e7253a2c434f791582c543f6
x86_64
passt-0^20251210.gd04c480-4.el9_8.x86_64.rpm SHA-256: 586b2b4f35c77536fd71e8a0d1f74e3feae49a23c900c317e99a465776330410
passt-debuginfo-0^20251210.gd04c480-4.el9_8.x86_64.rpm SHA-256: 33a7d27a5a4728e0e3307f9253521df56bee3c70de49cd1e2256a144e476d1bc
passt-debugsource-0^20251210.gd04c480-4.el9_8.x86_64.rpm SHA-256: 9557e13f1198ac762c8043dd8c0ef55df11980151e4510680f9eeb24f6655dd6
passt-selinux-0^20251210.gd04c480-4.el9_8.noarch.rpm SHA-256: e01918180731dc1714e566f53277ed6ef3ee70f6442ac04306e6883f68431c16

Red Hat Enterprise Linux for ARM 64 - 4 years of updates 9.8

SRPM
passt-0^20251210.gd04c480-4.el9_8.src.rpm SHA-256: 5617e7327f5a90cfaceb702ce99c5ceabefad5c3e7253a2c434f791582c543f6
aarch64
passt-0^20251210.gd04c480-4.el9_8.aarch64.rpm SHA-256: d40f5f216b01dd69a7ef6c8c83010c81123a9bed27fc6722bcd94a1e10a1b740
passt-debuginfo-0^20251210.gd04c480-4.el9_8.aarch64.rpm SHA-256: 25c26588b78ca84e433e3363143c81e87153db5be8bb53df151e962d82218152
passt-debugsource-0^20251210.gd04c480-4.el9_8.aarch64.rpm SHA-256: fa6ffef8c303d3bd464656d5a3313939b1e463d2f74d3e689513784de31f7c78
passt-selinux-0^20251210.gd04c480-4.el9_8.noarch.rpm SHA-256: e01918180731dc1714e566f53277ed6ef3ee70f6442ac04306e6883f68431c16

Red Hat Enterprise Linux for IBM z Systems - 4 years of updates 9.8

SRPM
passt-0^20251210.gd04c480-4.el9_8.src.rpm SHA-256: 5617e7327f5a90cfaceb702ce99c5ceabefad5c3e7253a2c434f791582c543f6
s390x
passt-0^20251210.gd04c480-4.el9_8.s390x.rpm SHA-256: 3fdb05f5a7bbfa6a84d3274af68b1799d1a855a77d7748b88c3d2dd60289d0ad
passt-debuginfo-0^20251210.gd04c480-4.el9_8.s390x.rpm SHA-256: ee090194e5cd99d3cb06d96d2f13b54e9685608686ac095fa0364274913c8630
passt-debugsource-0^20251210.gd04c480-4.el9_8.s390x.rpm SHA-256: c26b60ce78e80d92ee67c45886f388c1156e4c45c1b6616396082ad211e638da
passt-selinux-0^20251210.gd04c480-4.el9_8.noarch.rpm SHA-256: e01918180731dc1714e566f53277ed6ef3ee70f6442ac04306e6883f68431c16

Red Hat Enterprise Linux for x86_64 - Extended Life Cycle 9.8

SRPM
passt-0^20251210.gd04c480-4.el9_8.src.rpm SHA-256: 5617e7327f5a90cfaceb702ce99c5ceabefad5c3e7253a2c434f791582c543f6
x86_64
passt-0^20251210.gd04c480-4.el9_8.x86_64.rpm SHA-256: 586b2b4f35c77536fd71e8a0d1f74e3feae49a23c900c317e99a465776330410
passt-debuginfo-0^20251210.gd04c480-4.el9_8.x86_64.rpm SHA-256: 33a7d27a5a4728e0e3307f9253521df56bee3c70de49cd1e2256a144e476d1bc
passt-debugsource-0^20251210.gd04c480-4.el9_8.x86_64.rpm SHA-256: 9557e13f1198ac762c8043dd8c0ef55df11980151e4510680f9eeb24f6655dd6
passt-selinux-0^20251210.gd04c480-4.el9_8.noarch.rpm SHA-256: e01918180731dc1714e566f53277ed6ef3ee70f6442ac04306e6883f68431c16

Red Hat Enterprise Linux for ARM 64 - Extended Life Cycle 9.8

SRPM
passt-0^20251210.gd04c480-4.el9_8.src.rpm SHA-256: 5617e7327f5a90cfaceb702ce99c5ceabefad5c3e7253a2c434f791582c543f6
aarch64
passt-0^20251210.gd04c480-4.el9_8.aarch64.rpm SHA-256: d40f5f216b01dd69a7ef6c8c83010c81123a9bed27fc6722bcd94a1e10a1b740
passt-debuginfo-0^20251210.gd04c480-4.el9_8.aarch64.rpm SHA-256: 25c26588b78ca84e433e3363143c81e87153db5be8bb53df151e962d82218152
passt-debugsource-0^20251210.gd04c480-4.el9_8.aarch64.rpm SHA-256: fa6ffef8c303d3bd464656d5a3313939b1e463d2f74d3e689513784de31f7c78
passt-selinux-0^20251210.gd04c480-4.el9_8.noarch.rpm SHA-256: e01918180731dc1714e566f53277ed6ef3ee70f6442ac04306e6883f68431c16

Red Hat Enterprise Linux for Power, little endian - Extended Life Cycle 9.8

SRPM
passt-0^20251210.gd04c480-4.el9_8.src.rpm SHA-256: 5617e7327f5a90cfaceb702ce99c5ceabefad5c3e7253a2c434f791582c543f6
ppc64le
passt-0^20251210.gd04c480-4.el9_8.ppc64le.rpm SHA-256: 8fa4aeef902aa6f6b28bbdf4edbf9780ecd9d36dbbf85f741c79b7278727f576
passt-debuginfo-0^20251210.gd04c480-4.el9_8.ppc64le.rpm SHA-256: d433ac0f4a00032913b554a0667dc7ff6c8cfde4b1ca1cbfe4c432158d7eb71c
passt-debugsource-0^20251210.gd04c480-4.el9_8.ppc64le.rpm SHA-256: e2e7c4661169968de9afa1e230cb208bc3a52aeceb971aa9bd9775a2450ad61a
passt-selinux-0^20251210.gd04c480-4.el9_8.noarch.rpm SHA-256: e01918180731dc1714e566f53277ed6ef3ee70f6442ac04306e6883f68431c16

Red Hat Enterprise Linux for IBM z Systems - Extended Life Cycle 9.8

SRPM
passt-0^20251210.gd04c480-4.el9_8.src.rpm SHA-256: 5617e7327f5a90cfaceb702ce99c5ceabefad5c3e7253a2c434f791582c543f6
s390x
passt-0^20251210.gd04c480-4.el9_8.s390x.rpm SHA-256: 3fdb05f5a7bbfa6a84d3274af68b1799d1a855a77d7748b88c3d2dd60289d0ad
passt-debuginfo-0^20251210.gd04c480-4.el9_8.s390x.rpm SHA-256: ee090194e5cd99d3cb06d96d2f13b54e9685608686ac095fa0364274913c8630
passt-debugsource-0^20251210.gd04c480-4.el9_8.s390x.rpm SHA-256: c26b60ce78e80d92ee67c45886f388c1156e4c45c1b6616396082ad211e638da
passt-selinux-0^20251210.gd04c480-4.el9_8.noarch.rpm SHA-256: e01918180731dc1714e566f53277ed6ef3ee70f6442ac04306e6883f68431c16

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