RHSA-2024:4412 - Security Advisory

Topic

An update for kernel-rt is now available for Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions.

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: netfilter: use-after-free in nft_trans_gc_catchall_sync leads to privilege escalation (CVE-2024-0193)
• kernel: smb: client: fix potential OOBs in smb2_parse_contexts() (CVE-2023-52434)
• kernel: netfilter: nft_ct: sanitize layer 3 and 4 protocol number in custom expectations (CVE-2024-26673)

Bug Fix(es):

• kernel-rt: update RT source tree to the latest RHEL-9.0.z Batch 18 (JIRA:RHEL-36756)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer 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 for Real Time for x86_64 - 4 years of updates 9.0 x86_64
• Red Hat Enterprise Linux for Real Time for NFV for x86_64 - 4 years of updates 9.0 x86_64

Fixes

• BZ - 2255653 - CVE-2024-0193 kernel: netfilter: use-after-free in nft_trans_gc_catchall_sync leads to privilege escalation
• BZ - 2265285 - CVE-2023-52434 kernel: smb: client: fix potential OOBs in smb2_parse_contexts()
• BZ - 2272816 - CVE-2024-26673 kernel: netfilter: nft_ct: sanitize layer 3 and 4 protocol number in custom expectations

CVEs

• CVE-2023-52434
• CVE-2024-0193
• CVE-2024-26673

References

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