AlmaLinux alert ALSA-2026:25120 (kernel-rt)

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[Announce]  [Security Advisory] ALSA-2026:25120: kernel-rt security update (Critical)
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Thu, 11 Jun 2026 16:01:53 +0000
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<0100019eb76b25f8-a680d112-83b4-404f-9be8-48ee6782a4ab-000000@email.amazonses.com>
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Article
Hi,

You are receiving an AlmaLinux Security update email because you subscribed to receive errata
notifications from AlmaLinux.

AlmaLinux: 8
Type: Security
Severity: Critical
Release date: 2026-06-11

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: geneve: Fix use-after-free in geneve_find_dev(). (CVE-2025-21858)
  * kernel: smc: Fix use-after-free in tcp_write_timer_handler() (CVE-2023-53781)
  * kernel: nbd: defer config unlock in nbd_genl_connect (CVE-2025-68366)
  * kernel: libceph: prevent potential out-of-bounds reads in handle_auth_done() (CVE-2026-22984)
  * kernel: libceph: replace overzealous BUG_ON in osdmap_apply_incremental() (CVE-2026-22990)
  * kernel: netfilter: nf_tables: release flowtable after rcu grace period on error
(CVE-2026-23392)
  * kernel: ALSA: 6fire: fix use-after-free on disconnect (CVE-2026-31581)
  * kernel: smb: client: fix OOB reads parsing symlink error response (CVE-2026-31613)
  * kernel: ip6_tunnel: clear skb2->cb[] in ip4ip6_err() (CVE-2026-43037)
  * kernel: ipv6: icmp: clear skb2->cb[] in ip6_err_gen_icmpv6_unreach() (CVE-2026-43038)
  * kernel: dlm: validate length in dlm_search_rsb_tree (CVE-2026-43125)
  * kernel: RDMA/rxe: Fix double free in rxe_srq_from_init (CVE-2026-45852)
  * kernel: RDMA/mlx4: Fix mis-use of RCU in mlx4_srq_event() (CVE-2026-46181)


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.


Full details, updated packages, references, and other related information:
https://errata.almalinux.org/8/ALSA-2026-25120.html

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AlmaLinux Team
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