RHSA-2024:3414 - Security Advisory

Topic

An update for kernel-rt is now available for Red Hat Enterprise Linux 9.0 Extended Update Support.

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: Marvin vulnerability side-channel leakage in the RSA decryption operation (CVE-2023-6240)
• kernel: nf_tables: use-after-free vulnerability in the nft_verdict_init() function (CVE-2024-1086)
• kernel: mlxsw: spectrum_acl_tcam: Fix stack corruption (CVE-2024-26586)
• kernel: netfilter: nftables: exthdr: fix 4-byte stack OOB write (CVE-2023-52628)
• kernel: Use-after-free in nft_verdict_dump due to a race between set GC and transaction (CVE-2023-4244)
• kernel: inactive elements in nft_pipapo_walk (CVE-2023-6817)

Bug Fix(es):

• kernel-rt: update RT source tree to the latest RHEL-9.0.z Batch 17 (JIRA:RHEL-32673)

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 - 2235306 - CVE-2023-4244 kernel: Use-after-free in nft_verdict_dump due to a race between set GC and transaction
• BZ - 2250843 - CVE-2023-6240 kernel: Marvin vulnerability side-channel leakage in the RSA decryption operation
• BZ - 2255139 - CVE-2023-6817 kernel: inactive elements in nft_pipapo_walk
• BZ - 2262126 - CVE-2024-1086 kernel: nf_tables: use-after-free vulnerability in the nft_verdict_init() function
• BZ - 2265645 - CVE-2024-26586 kernel: mlxsw: spectrum_acl_tcam: Fix stack corruption
• BZ - 2272041 - CVE-2023-52628 kernel: netfilter: nftables: exthdr: fix 4-byte stack OOB write

CVEs

• CVE-2023-4244
• CVE-2023-6240
• CVE-2023-6817
• CVE-2023-52628
• CVE-2024-1086
• CVE-2024-26586

References

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