RHSA-2023:1203: Important: kernel-rt security and bug fix update
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: use-after-free caused by l2capreassemblesdu() in net/bluetooth/l2capcore.c (CVE-2022-3564) kernel: stack overflow in doprocdointvec and procskipspaces (CVE-2022-4378) kernel: use-after-free in nfs42sscopen() in fs/nfs/nfs4file.c leading to remote Denial of Service attack (CVE-2022-4379) kernel: Netfilter integer overflow vulnerability in nftpayloadcopyvlan (CVE-2023-0179) ALSA: pcm: Move rwsem lock inside sndctlelemread to prevent UAF (CVE-2023-0266) kernel: net: CPU soft lockup in TC mirred egress-to-ingress action (CVE-2022-4269) 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): kernel-rt: update RT source tree to the latest RHEL-9.0.z7 Batch (BZ#2162424)
Affected Software
Remediation
Event History
Frequently Asked Questions
What is the severity of RHSA-2023:1203?
The severity of RHSA-2023:1203 is considered critical due to the use-after-free vulnerability in the Real Time Linux Kernel.
How do I fix RHSA-2023:1203?
To fix RHSA-2023:1203, upgrade the kernel-rt package to version 5.14.0-70.49.1.rt21.120.el9_0 or later.
What vulnerability is addressed by RHSA-2023:1203?
RHSA-2023:1203 addresses a use-after-free vulnerability caused by the l2cap_reassemble_sdu() function in the Bluetooth stack.
Which packages are affected by RHSA-2023:1203?
Affected packages for RHSA-2023:1203 include kernel-rt, kernel-rt-core, kernel-rt-debug, and related kernel-rt modules.
Is RHSA-2023:1203 related to Bluetooth security?
Yes, RHSA-2023:1203 is related to Bluetooth security, specifically addressing a vulnerability in the Bluetooth implementation in the Real Time Linux Kernel.