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High RLSA-2026:82806 8 CVEs

Important: kernel-rt security update

Published Oct 15, 2026 · Updated Oct 15, 2026

Ecosystem: Rocky Linux

Summary

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: openvswitch: defer tunnel netdev_put to RCU release (CVE-2026-31678)

* kernel: ipv6: validate extension header length before copying to cmsg (CVE-2026-63920)

* kernel: drm/amd/display: set new_stream to NULL after release (CVE-2026-68236)

* kernel: drm/dp/mst: fix buffer overflows in sideband chunk accumulation (CVE-2026-68278)

* kernel: wifi: mac80211: defer link RX stats percpu free to RCU (CVE-2026-68409)

* kernel: drm/amdgpu/vce: fix integer overflow in image size (CVE-2026-68108)

* kernel: drm/vmwgfx: use check_add_overflow for shader size+offset bound (CVE-2026-80887)

* kernel: drm/amdkfd: Add TLB flush after MES queue eviction/suspension (CVE-2026-89811)

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.

Fixed packages 1

ReleasePackageFixed in
Rocky Linux · 8 kernel-rt 0:4.18.0-553.173.1.rt7.514.el8_10

Vulnerabilities 8

  • High 8.8
    CVE-2026-68108

    drm/amdgpu/vce: fix integer overflow in image size

    In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu/vce: fix integer overflow in image size Fix a security vulnerability where malicious VCE command streams with oversized dimensions (e.g. 65536×65536) cause 32-bit integer overflow,…

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  • High 8.8
    CVE-2026-68409

    wifi: mac80211: defer link RX stats percpu free to RCU

    In the Linux kernel, the following vulnerability has been resolved: wifi: mac80211: defer link RX stats percpu free to RCU sta_remove_link() frees a removed MLO link's RX stats percpu buffer right away, but defers only the link container to RCU: sta_info_free…

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  • High 8.8
    CVE-2026-89811

    drm/amdkfd: Add TLB flush after MES queue eviction/suspension

    In the Linux kernel, the following vulnerability has been resolved: drm/amdkfd: Add TLB flush after MES queue eviction/suspension MES (Micro Engine Scheduler) does not perform heavy-weight TLB invalidation after unmapping queues, unlike HWS which does this au…

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  • High 7.8
    CVE-2026-31678

    openvswitch: defer tunnel netdev_put to RCU release

    In the Linux kernel, the following vulnerability has been resolved: openvswitch: defer tunnel netdev_put to RCU release ovs_netdev_tunnel_destroy() may run after NETDEV_UNREGISTER already detached the device. Dropping the netdev reference in destroy can race …

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  • High 7.8
    CVE-2026-68236

    drm/amd/display: set new_stream to NULL after release

    In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: set new_stream to NULL after release In dm_update_crtc_state(), the skip_modeset path releases new_stream via dc_stream_release() but does not set the pointer to NULL. If a l…

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  • High 7.1
    CVE-2026-63920

    ipv6: validate extension header length before copying to cmsg

    In the Linux kernel, the following vulnerability has been resolved: ipv6: validate extension header length before copying to cmsg ip6_datagram_recv_specific_ctl() builds IPV6_{HOPOPTS,DSTOPTS,RTHDR} cmsgs (and their IPV6_2292* legacy counterparts) by trusting…

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  • Unscored —
    CVE-2026-68278

    drm/dp/mst: fix buffer overflows in sideband chunk accumulation

    In the Linux kernel, the following vulnerability has been resolved: drm/dp/mst: fix buffer overflows in sideband chunk accumulation drm_dp_sideband_append_payload() has three related bugs when processing device-provided sideband reply data: 1. Zero-length cur…

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  • Unscored —
    CVE-2026-80887

    drm/vmwgfx: use check_add_overflow for shader size+offset bound

    In the Linux kernel, the following vulnerability has been resolved: drm/vmwgfx: use check_add_overflow for shader size+offset bound vmw_shader_define() validates the user-supplied shader window against its backing buffer with (u64)buffer->tbo.base.size < (u64…

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux

References

  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2461761
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2502330
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2513148
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2513287
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2513299
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2513361
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2528788
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2535309
  • advisory
    https://access.redhat.com/errata/RHSA-2026:82806