RHSA-2026:0917 — Security Advisory
Red Hat Security Advisory: kernel security update
Severity
ModerateRed Hat Product Security
Products
Official CSAF product identity
Published · January 21, 2026
Updated · October 30, 2026
Topic
An update for kernel is now available for Red Hat Enterprise Linux 9.4 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 packages contain the Linux kernel, the core of any Linux operating system.
Security Fix(es):
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kernel: Linux kernel: iommufd/iova_bitmap shift-out-of-bounds vulnerability (CVE-2025-21724)
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kernel: KVM: arm64: Tear down vGIC on failed vCPU creation (CVE-2025-37849)
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kernel: Linux kernel: ALSA: ump buffer overflow via malformed UMP SysEx message (CVE-2025-37891)
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kernel: ASoC: Intel: bytcr_rt5640: Fix invalid quirk input mapping (CVE-2025-40154)
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kernel: drm/vmwgfx: Validate command header size against SVGA_CMD_MAX_DATASIZE (CVE-2025-40277)
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.