Important: kernel-rt security and bug fix update

Topic

An update for kernel-rt is now available for Red Hat Enterprise Linux 9.

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-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements.

Security Fix(es):

• kernel: watch queue race condition can lead to privilege escalation (CVE-2022-2959)
• kernel: memory corruption in AX88179_178A based USB ethernet device. (CVE-2022-2964)
• kernel: i915: Incorrect GPU TLB flush can lead to random memory access (CVE-2022-4139)
• kernel: nfsd buffer overflow by RPC message over TCP with garbage data (CVE-2022-43945)
• kernel: i2c: unbounded length leads to buffer overflow in ismt_access() (CVE-2022-3077)
• kernel: Unprivileged users may use PTRACE_SEIZE to set PTRACE_O_SUSPEND_SECCOMP option (CVE-2022-30594)

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.

Bug Fix(es):

• DELL EMC: System is not booting into RT Kernel with perc12 [kernel-rt] (BZ#2139863)
• kernel-rt: update RT source tree to the latest RHEL-9.1.z1 Batch (BZ#2141817)

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 for Real Time 9 x86_64
• Red Hat Enterprise Linux for Real Time for NFV 9 x86_64

Fixes

• BZ - 2067482 - CVE-2022-2964 kernel: memory corruption in AX88179_178A based USB ethernet device.
• BZ - 2085300 - CVE-2022-30594 kernel: Unprivileged users may use PTRACE_SEIZE to set PTRACE_O_SUSPEND_SECCOMP option
• BZ - 2103681 - CVE-2022-2959 kernel: watch queue race condition can lead to privilege escalation
• BZ - 2123309 - CVE-2022-3077 kernel: i2c: unbounded length leads to buffer overflow in ismt_access()
• BZ - 2141752 - CVE-2022-43945 kernel: nfsd buffer overflow by RPC message over TCP with garbage data
• BZ - 2147572 - CVE-2022-4139 kernel: i915: Incorrect GPU TLB flush can lead to random memory access

CVEs

• CVE-2022-2959
• CVE-2022-2964
• CVE-2022-3077
• CVE-2022-4139
• CVE-2022-30594
• CVE-2022-43945

References

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