Red Hat alert RHSA-2026:0917-01 (kernel)

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.

The kernel packages contain the Linux kernel, the core of any Linux operating
system.

Security Fix(es):

* kernel: Linux kernel: iommufd/iova_bitmap shift-out-of-bounds vulnerability
(CVE-2025-21724)

* kernel: KVM: arm64: Tear down vGIC on failed vCPU creation (CVE-2025-37849)

* kernel: Linux kernel: ALSA: ump buffer overflow via malformed UMP SysEx
message (CVE-2025-37891)

* kernel: ASoC: Intel: bytcr_rt5640: Fix invalid quirk input mapping
(CVE-2025-40154)

* 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.

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Original: https://access.redhat.com/security/data/csaf/v2/advisories/2026/rhsa-2026_0917.json