RHSA-2024:2004 - Security Advisory

Topic

An update for kernel is now available for Red Hat Enterprise Linux 7.

Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

Description

The kernel packages contain the Linux kernel, the core of any Linux operating system.

Security fixes:

• kernel: use after free in unix_stream_sendpage (CVE-2023-4622)
• Kernel: bluetooth: Unauthorized management command execution (CVE-2023-2002)
• kernel: irdma: Improper access control (CVE-2023-25775)
• kernel: net/sched: sch_hfsc UAF (CVE-2023-4623)
• kernel: race condition in VT_RESIZEX ioctl when vc_cons[i].d is already NULL leading to NULL pointer dereference (CVE-2020-36558)

This update also fixes the following bugs:

• NFS client closes active connection (RHEL-22193)
• kernel panic at __list_del_entry from smb2_reconnect_server (RHEL-26301)
• kernel: race condition when call to VT_RESIZEX ioctl and vc_cons[i].d is already NULL, causing a NULL pointer dereference. (RHEL-28639)
• kernel: net/sched: sch_hfsc UAF (RHEL-16458)
• kernel: irdma: Improper access control (RHEL-6299)
• The message in RHEL 7 ?stack-protector: Kernel stack is corrupted in:? is triggered because perf_trace_buf_prepare() does not verify that per_cpu array perf_trace_buf has allocated per_cpu buffers in it. (RHEL-18052)
• [rhel7] gfs2: Invalid metadata access in punch_hole (RHEL-28785)
• UDP packets dropped due to SELinux denial (RHEL-27751)
• Boot fails with kernel panic at acpi_device_hid+0x6 (RHEL-8721)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

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

The system must be rebooted for this update to take effect.

Affected Products

• Red Hat Enterprise Linux Server 7 x86_64
• Red Hat Enterprise Linux Server - Extended Life Cycle Support 7 x86_64
• Red Hat Enterprise Linux Workstation 7 x86_64
• Red Hat Enterprise Linux Desktop 7 x86_64
• Red Hat Enterprise Linux for IBM z Systems 7 s390x
• Red Hat Enterprise Linux for Power, big endian 7 ppc64
• Red Hat Enterprise Linux for Scientific Computing 7 x86_64
• Red Hat Enterprise Linux for Power, little endian 7 ppc64le
• Red Hat Enterprise Linux Server - Extended Life Cycle Support (for IBM z Systems) 7 s390x
• Red Hat Enterprise Linux Server - Extended Life Cycle Support for IBM Power, big endian 7 ppc64
• Red Hat Enterprise Linux Server - Extended Life Cycle Support for IBM Power, little endian 7 ppc64le

Fixes

• BZ - 2112693 - CVE-2020-36558 kernel: race condition in VT_RESIZEX ioctl when vc_cons[i].d is already NULL leading to NULL pointer dereference
• BZ - 2187308 - CVE-2023-2002 Kernel: bluetooth: Unauthorized management command execution
• BZ - 2231410 - CVE-2023-25775 kernel: irdma: Improper access control
• BZ - 2237757 - CVE-2023-4623 kernel: net/sched: sch_hfsc UAF
• BZ - 2237760 - CVE-2023-4622 kernel: use after free in unix_stream_sendpage

CVEs

• CVE-2020-36558
• CVE-2023-2002
• CVE-2023-4622
• CVE-2023-4623
• CVE-2023-25775

References

• https://access.redhat.com/security/updates/classification/#important