RHSA-2024:4106 - 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 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: nf_tables: use timestamp to check for set element timeout (CVE-2024-27397)
• kernel: xen-netfront: Add missing skb_mark_for_recycle (CVE-2024-27393)
• kernel: netfilter: nft_flow_offload: reset dst in route object after setting up flow (CVE-2024-27403)
• kernel: smb: client: fix UAF in smb2_reconnect_server() (CVE-2024-35870)
• kernel: net/mlx5: Properly link new fs rules into the tree (CVE-2024-35960)
• kernel: net: ena: Fix incorrect descriptor free behavior (CVE-2024-35958)
• kernel: net: hns3: do not allow call hns3_nic_net_open repeatedly (CVE-2021-47400)
• kernel: octeontx2-af: avoid off-by-one read from userspace (CVE-2024-36957)

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

Fixes

• BZ - 2280434 - CVE-2024-27397 kernel: netfilter: nf_tables: use timestamp to check for set element timeout
• BZ - 2280745 - CVE-2024-27393 kernel: xen-netfront: Add missing skb_mark_for_recycle
• BZ - 2281127 - CVE-2024-27403 kernel: netfilter: nft_flow_offload: reset dst in route object after setting up flow
• BZ - 2281740 - CVE-2024-35870 kernel: smb: client: fix UAF in smb2_reconnect_server()
• BZ - 2281920 - CVE-2024-35960 kernel: net/mlx5: Properly link new fs rules into the tree
• BZ - 2281925 - CVE-2024-35958 kernel: net: ena: Fix incorrect descriptor free behavior
• BZ - 2282336 - CVE-2021-47400 kernel: net: hns3: do not allow call hns3_nic_net_open repeatedly
• BZ - 2284581 - CVE-2024-36957 kernel: octeontx2-af: avoid off-by-one read from userspace

CVEs

• CVE-2021-47400
• CVE-2024-27393
• CVE-2024-27397
• CVE-2024-27403
• CVE-2024-35870
• CVE-2024-35958
• CVE-2024-35960
• CVE-2024-36957

References

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