RHSA-2026:1886 - Security Advisory

Topic

An update for kernel is now available for Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support and Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On.

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: cifs: fix oops during encryption (CVE-2022-50341)
• kernel: i40e: fix idx validation in config queues msg (CVE-2025-39971)
• kernel: ASoC: Intel: bytcr_rt5640: Fix invalid quirk input mapping (CVE-2025-40154)
• kernel: Linux kernel: vsock vulnerability may lead to memory corruption (CVE-2025-40248)
• kernel: Linux kernel Bluetooth L2CAP: Kernel crash due to use-after-free via race condition (CVE-2023-53751)
• kernel: drm/vmwgfx: Validate command header size against SVGA_CMD_MAX_DATASIZE (CVE-2025-40277)
• kernel: net: atlantic: fix fragment overflow handling in RX path (CVE-2025-68301)

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 Update Support Extension 8.4 x86_64
• Red Hat Enterprise Linux Server - AUS 8.4 x86_64

Fixes

• BZ - 2347727 - CVE-2022-49290 kernel: mac80211: fix potential double free on mesh join
• BZ - 2395879 - CVE-2022-50341 kernel: cifs: fix oops during encryption
• BZ - 2404108 - CVE-2025-39971 kernel: i40e: fix idx validation in config queues msg
• BZ - 2414494 - CVE-2025-40154 kernel: ASoC: Intel: bytcr_rt5640: Fix invalid quirk input mapping
• BZ - 2418872 - CVE-2025-40248 kernel: Linux kernel: vsock vulnerability may lead to memory corruption
• BZ - 2419858 - CVE-2023-53751 kernel: Linux kernel Bluetooth L2CAP: Kernel crash due to use-after-free via race condition
• BZ - 2419954 - CVE-2025-40277 kernel: drm/vmwgfx: Validate command header size against SVGA_CMD_MAX_DATASIZE
• BZ - 2422836 - CVE-2025-68301 kernel: net: atlantic: fix fragment overflow handling in RX path

CVEs

• CVE-2022-49290
• CVE-2022-50341
• CVE-2023-53751
• CVE-2025-39971
• CVE-2025-40154
• CVE-2025-40248
• CVE-2025-40277
• CVE-2025-68301

References

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