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Medium ALSA-2025:22800 3 CVEs

Moderate: kernel-rt security update

Published Dec 8, 2025 · 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: mm: kmem: fix a NULL pointer dereference in obj_stock_flush_required() (CVE-2023-53401)
* kernel: RDMA/rxe: Fix incomplete state save in rxe_requester (CVE-2023-53539)
* kernel: RDMA/rxe: Fix mr->map double free (CVE-2022-50543)

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 4.18.0-553.89.1.rt7.430.el8_10
AlmaLinux · 8 kernel-rt-core 4.18.0-553.89.1.rt7.430.el8_10
AlmaLinux · 8 kernel-rt-debug 4.18.0-553.89.1.rt7.430.el8_10
AlmaLinux · 8 kernel-rt-debug-core 4.18.0-553.89.1.rt7.430.el8_10
AlmaLinux · 8 kernel-rt-debug-devel 4.18.0-553.89.1.rt7.430.el8_10
AlmaLinux · 8 kernel-rt-debug-modules 4.18.0-553.89.1.rt7.430.el8_10
AlmaLinux · 8 kernel-rt-debug-modules-extra 4.18.0-553.89.1.rt7.430.el8_10
AlmaLinux · 8 kernel-rt-devel 4.18.0-553.89.1.rt7.430.el8_10
AlmaLinux · 8 kernel-rt-modules 4.18.0-553.89.1.rt7.430.el8_10
AlmaLinux · 8 kernel-rt-modules-extra 4.18.0-553.89.1.rt7.430.el8_10

Vulnerabilities 3

  • High 7.8
    CVE-2022-50543

    RDMA/rxe: Fix mr->map double free

    In the Linux kernel, the following vulnerability has been resolved: RDMA/rxe: Fix mr->map double free rxe_mr_cleanup() which tries to free mr->map again will be called when rxe_mr_init_user() fails: CPU: 0 PID: 4917 Comm: rdma_flush_serv Kdump: loaded Not tai…

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  • High 7.8
    CVE-2023-53539

    RDMA/rxe: Fix incomplete state save in rxe_requester

    In the Linux kernel, the following vulnerability has been resolved: RDMA/rxe: Fix incomplete state save in rxe_requester If a send packet is dropped by the IP layer in rxe_requester() the call to rxe_xmit_packet() can fail with err == -EAGAIN. To recover, the…

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  • Medium 4.7
    CVE-2023-53401

    mm: kmem: fix a NULL pointer dereference in obj_stock_flush_required()

    In the Linux kernel, the following vulnerability has been resolved: mm: kmem: fix a NULL pointer dereference in obj_stock_flush_required() KCSAN found an issue in obj_stock_flush_required(): stock->cached_objcg can be reset between the check and dereference: …

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

References

  • report
    https://access.redhat.com/security/cve/CVE-2022-50543
  • report
    https://access.redhat.com/security/cve/CVE-2023-53401
  • report
    https://access.redhat.com/security/cve/CVE-2023-53539
  • report
    https://bugzilla.redhat.com/2396417
  • report
    https://bugzilla.redhat.com/2401510
  • report
    https://bugzilla.redhat.com/2402222
  • advisory
    https://errata.almalinux.org/8/ALSA-2025-22800.html