Skip to content
OpenAdvisories
Medium ALSA-2026:6572 4 CVEs

Moderate: kernel-rt security update

Published Apr 6, 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: nouveau: fix instmem race condition around ptr stores (CVE-2024-26984)
* kernel: scsi: target: iscsi: Fix use-after-free in iscsit_dec_session_usage_count() (CVE-2026-23193)
* kernel: kernel: Privilege escalation or denial of service via use-after-free in nf_tables_addchain() (CVE-2026-23231)
* kernel: Linux kernel (qla2xxx): Double free vulnerability leads to denial of service and potential privilege escalation. (CVE-2025-71238)

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 4.18.0-553.117.1.rt7.458.el8_10
AlmaLinux · 8 kernel-rt-core 4.18.0-553.117.1.rt7.458.el8_10
AlmaLinux · 8 kernel-rt-debug 4.18.0-553.117.1.rt7.458.el8_10
AlmaLinux · 8 kernel-rt-debug-core 4.18.0-553.117.1.rt7.458.el8_10
AlmaLinux · 8 kernel-rt-debug-devel 4.18.0-553.117.1.rt7.458.el8_10
AlmaLinux · 8 kernel-rt-debug-modules 4.18.0-553.117.1.rt7.458.el8_10
AlmaLinux · 8 kernel-rt-debug-modules-extra 4.18.0-553.117.1.rt7.458.el8_10
AlmaLinux · 8 kernel-rt-devel 4.18.0-553.117.1.rt7.458.el8_10
AlmaLinux · 8 kernel-rt-modules 4.18.0-553.117.1.rt7.458.el8_10
AlmaLinux · 8 kernel-rt-modules-extra 4.18.0-553.117.1.rt7.458.el8_10

Vulnerabilities 4

  • High 8.8
    CVE-2026-23193

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

    In the Linux kernel, the following vulnerability has been resolved: scsi: target: iscsi: Fix use-after-free in iscsit_dec_session_usage_count() In iscsit_dec_session_usage_count(), the function calls complete() while holding the sess->session_usage_lock. Simi…

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  • High 7.8
    CVE-2026-23231 Public exploit

    netfilter: nf_tables: fix use-after-free in nf_tables_addchain()

    In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_tables: fix use-after-free in nf_tables_addchain() nf_tables_addchain() publishes the chain to table->chains via list_add_tail_rcu() (in nft_chain_add()) before registering hook…

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  • Medium 5.5
    CVE-2024-26984

    nouveau: fix instmem race condition around ptr stores

    In the Linux kernel, the following vulnerability has been resolved: nouveau: fix instmem race condition around ptr stores Running a lot of VK CTS in parallel against nouveau, once every few hours you might see something like this crash. BUG: kernel NULL point…

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  • Unscored —
    CVE-2025-71238

    scsi: qla2xxx: Fix bsg_done() causing double free

    In the Linux kernel, the following vulnerability has been resolved: scsi: qla2xxx: Fix bsg_done() causing double free Kernel panic observed on system, [5353358.825191] BUG: unable to handle page fault for address: ff5f5e897b024000 [5353358.825194] #PF: superv…

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

References

  • report
    https://access.redhat.com/security/cve/CVE-2024-26984
  • report
    https://access.redhat.com/security/cve/CVE-2025-71238
  • report
    https://access.redhat.com/security/cve/CVE-2026-23193
  • report
    https://access.redhat.com/security/cve/CVE-2026-23231
  • report
    https://bugzilla.redhat.com/2278333
  • report
    https://bugzilla.redhat.com/2439887
  • report
    https://bugzilla.redhat.com/2444376
  • report
    https://bugzilla.redhat.com/2444398
  • advisory
    https://errata.almalinux.org/8/ALSA-2026-6572.html