RHSA-2024:3460 - Security Advisory

Topic

An update for kernel-rt is now available for Red Hat Enterprise Linux 9.2 Extended Update Support.

Red Hat Product Security has rated this update as having a security impact of Moderate. 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: nf_tables: mark set as dead when unbinding anonymous set with timeout (CVE-2024-26643)
• kernel: netfilter: nf_tables: disallow anonymous set with timeout flag (CVE-2024-26642)
• kernel: netfilter: nft_ct: sanitize layer 3 and 4 protocol number in custom expectations (CVE-2024-26673)
• kernel: ipv6: sr: fix possible use-after-free and null-ptr-deref (CVE-2024-26735)
• kernel: net: ip_tunnel: prevent perpetual headroom growth (CVE-2024-26804)
• kernel: cifs: fix underflow in parse_server_interfaces() (CVE-2024-26828)
• kernel: fs: sysfs: Fix reference leak in sysfs_break_active_protection() (CVE-2024-26993)

Bug Fix:

• kernel-rt: update RT source tree to the latest RHEL-9.2 ad hoc schedule build (JIRA:RHEL-36221)

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 9.2 x86_64
• Red Hat Enterprise Linux for Real Time for NFV for x86_64 - 4 years of updates 9.2 x86_64

Fixes

• BZ - 2270879 - CVE-2024-26643 kernel: netfilter: nf_tables: mark set as dead when unbinding anonymous set with timeout
• BZ - 2270881 - CVE-2024-26642 kernel: netfilter: nf_tables: disallow anonymous set with timeout flag
• BZ - 2272816 - CVE-2024-26673 kernel: netfilter: nft_ct: sanitize layer 3 and 4 protocol number in custom expectations
• BZ - 2273278 - CVE-2024-26735 kernel: ipv6: sr: fix possible use-after-free and null-ptr-deref
• BZ - 2273423 - CVE-2024-26804 kernel: net: ip_tunnel: prevent perpetual headroom growth
• BZ - 2275600 - CVE-2024-26828 kernel: cifs: fix underflow in parse_server_interfaces()
• BZ - 2278314 - CVE-2024-26993 kernel: fs: sysfs: Fix reference leak in sysfs_break_active_protection()

CVEs

• CVE-2024-26642
• CVE-2024-26643
• CVE-2024-26673
• CVE-2024-26735
• CVE-2024-26804
• CVE-2024-26828
• CVE-2024-26993

References

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