RHBA-2015:1358 - Bug Fix Advisory

Topic

Updated libxcb and libX11 packages that fix several bugs are now available for
Red Hat Enterprise Linux 6.

Description

The libxcb packages provide the X protocol C-language Binding (XCB) library. XCB
is a replacement for Xlib featuring a small footprint, latency hiding, direct
access to the protocol, improved threading support, and extensibility. The
libX11 packages contain the core X11 protocol client library.

This update fixes the following bugs:

• Previously, the "mute microphone" key in some cases did not work when using

Red Hat Enterprise Linux 6. With this update, libX11 properly resolves the key
symbol assigned to the "mute microphone" key by the xkeyboard-config keyboard
layout files, and the "mute microphone" key now works as expected. (BZ#667789)

• On 32-bit architectures, an X11 protocol client was under certain

circumstances disconnected after processing a large number of X11 requests. With
this update, the libxcb library exposes the request sequence number as a 64-bit
integer so that libX11 can make use of 64-bit sequence number even on 32-bit
systems. As a result, the described failure of the X11 client no longer occurs.
(BZ#1206240, BZ#1046410, BZ#1164296)

Users of libxcb and libX11 are advised to upgrade to these updated packages,
which fix these bugs.

Solution

Before applying this update, make sure all previously released errata
relevant to your system have been applied.

For details on how to apply this update, refer to:

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

Affected Products

• Red Hat Enterprise Linux Server 6 x86_64
• Red Hat Enterprise Linux Server 6 i386
• Red Hat Enterprise Linux Workstation 6 x86_64
• Red Hat Enterprise Linux Workstation 6 i386
• Red Hat Enterprise Linux Desktop 6 x86_64
• Red Hat Enterprise Linux for IBM z Systems 6 s390x
• Red Hat Enterprise Linux for Power, big endian 6 ppc64
• Red Hat Enterprise Linux Server from RHUI 6 x86_64
• Red Hat Enterprise Linux Server from RHUI 6 i386
• Red Hat Enterprise Linux Server - Extended Life Cycle Support 6 x86_64
• Red Hat Enterprise Linux Server - Extended Life Cycle Support 6 i386
• Red Hat Enterprise Linux Desktop 6 i386
• Red Hat Enterprise Linux for Scientific Computing 6 x86_64
• Red Hat Enterprise Linux Server - Extended Life Cycle Support (for IBM z Systems) 6 s390x
• Red Hat Enterprise Linux Server - Extended Life Cycle Support Extension 6 x86_64
• Red Hat Enterprise Linux Server - Extended Life Cycle Support Extension 6 i386
• Red Hat Enterprise Linux Server - Extended Life Cycle Support Extension (for IBM z Systems) 6 s390x

Fixes

• BZ - 1046410 - X APPLICATION CRASHES AFTER SOME TIME ON RHEL6 X86 WITH LIBXCB 1.8.1
• BZ - 1164296 - Application crashes after many hours of drawing

CVEs

(none)

References

(none)