RHSA-2026:1442 - Security Advisory

Topic

An update for kernel is now available for Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support, Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions, and Red Hat Enterprise Linux 8.6 Telecommunications Update Service.

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

Security Fix(es):

• kernel: mac80211: fix potential double free on mesh join (CVE-2022-49290)
• kernel: media: rc: fix races with imon_disconnect() (CVE-2025-39993)
• kernel: ipv6: Fix out-of-bounds access in ipv6_find_tlv() (CVE-2023-53705)
• kernel: Linux kernel: vsock vulnerability may lead to memory corruption (CVE-2025-40248)
• 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.

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 x86_64 - Extended Life Cycle Long Life 8.6 x86_64
• Red Hat Enterprise Linux Server - AUS 8.6 x86_64
• Red Hat Enterprise Linux Server - TUS 8.6 x86_64
• Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions 8.6 ppc64le
• Red Hat Enterprise Linux for x86_64 - Update Services for SAP Solutions 8.6 x86_64
• Red Hat Enterprise Linux for ARM 64 - Extended Life Cycle Long Life 8.6 aarch64
• Red Hat Enterprise Linux for Power, little endian - Extended Life Cycle Long Life 8.6 ppc64le
• Red Hat Enterprise Linux for IBM z Systems - Extended Life Cycle Long Life 8.6 s390x

Fixes

• BZ - 2347727 - CVE-2022-49290 kernel: mac80211: fix potential double free on mesh join
• BZ - 2404121 - CVE-2025-39993 kernel: media: rc: fix races with imon_disconnect()
• BZ - 2405713 - CVE-2023-53705 kernel: ipv6: Fix out-of-bounds access in ipv6_find_tlv()
• BZ - 2418872 - CVE-2025-40248 kernel: Linux kernel: vsock vulnerability may lead to memory corruption
• BZ - 2419954 - CVE-2025-40277 kernel: drm/vmwgfx: Validate command header size against SVGA_CMD_MAX_DATASIZE

CVEs

• CVE-2022-49290
• CVE-2023-53705
• CVE-2025-39993
• CVE-2025-40248
• CVE-2025-40277

References

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