Skip to content
OpenAdvisories
High ALSA-2026:36049 3 CVEs

Important: kernel-rt security, bug fix, and enhancement update

Published Jul 7, 2026 · Updated Oct 29, 2026

Ecosystem: AlmaLinux

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: scsi: target: iscsi: Fix use-after-free in iscsit_dec_conn_usage_count() (CVE-2026-23216)
* kernel: gfs2: Fix use-after-free in iomap inline data write path (CVE-2026-45984)
* kernel: RDMA/vmw_pvrdma: Fix double free on pvrdma_alloc_ucontext() error path (CVE-2026-46189)

Bug Fix(es) and Enhancement(s):

* [AlmaLinux 8.10.z] Add an .sbat section to the x86 kernel (JIRA:AlmaLinux-182788)
* Incorrect message "NFS: Server wrote zero bytes" is shown in the logs (JIRA:AlmaLinux-147665)

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 10

ReleasePackageFixed in
AlmaLinux · 8 kernel-rt 4.18.0-553.139.1.rt7.480.el8_10
AlmaLinux · 8 kernel-rt-core 4.18.0-553.139.1.rt7.480.el8_10
AlmaLinux · 8 kernel-rt-debug 4.18.0-553.139.1.rt7.480.el8_10
AlmaLinux · 8 kernel-rt-debug-core 4.18.0-553.139.1.rt7.480.el8_10
AlmaLinux · 8 kernel-rt-debug-devel 4.18.0-553.139.1.rt7.480.el8_10
AlmaLinux · 8 kernel-rt-debug-modules 4.18.0-553.139.1.rt7.480.el8_10
AlmaLinux · 8 kernel-rt-debug-modules-extra 4.18.0-553.139.1.rt7.480.el8_10
AlmaLinux · 8 kernel-rt-devel 4.18.0-553.139.1.rt7.480.el8_10
AlmaLinux · 8 kernel-rt-modules 4.18.0-553.139.1.rt7.480.el8_10
AlmaLinux · 8 kernel-rt-modules-extra 4.18.0-553.139.1.rt7.480.el8_10

Vulnerabilities 3

  • High 7.8
    CVE-2026-45984

    gfs2: Fix use-after-free in iomap inline data write path

    In the Linux kernel, the following vulnerability has been resolved: gfs2: Fix use-after-free in iomap inline data write path The inline data buffer head (dibh) is being released prematurely in gfs2_iomap_begin() via release_metapath() while iomap->inline_data…

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  • High 7.0
    CVE-2026-46189

    RDMA/vmw_pvrdma: Fix double free on pvrdma_alloc_ucontext() error path

    In the Linux kernel, the following vulnerability has been resolved: RDMA/vmw_pvrdma: Fix double free on pvrdma_alloc_ucontext() error path Sashiko points out that pvrdma_uar_free() is already called within pvrdma_dealloc_ucontext(), so calling it before trigg…

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  • Unscored —
    CVE-2026-23216

    scsi: target: iscsi: Fix use-after-free in iscsit_dec_conn_usage_count()

    In the Linux kernel, the following vulnerability has been resolved: scsi: target: iscsi: Fix use-after-free in iscsit_dec_conn_usage_count() In iscsit_dec_conn_usage_count(), the function calls complete() while holding the conn->conn_usage_lock. As soon as co…

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

References

  • report
    https://access.redhat.com/security/cve/CVE-2026-23216
  • report
    https://access.redhat.com/security/cve/CVE-2026-45984
  • report
    https://access.redhat.com/security/cve/CVE-2026-46189
  • report
    https://bugzilla.redhat.com/2440630
  • report
    https://bugzilla.redhat.com/2481922
  • report
    https://bugzilla.redhat.com/2482588
  • advisory
    https://errata.almalinux.org/8/ALSA-2026-36049.html