AlmaLinux alert ALSA-2026:21745 (kernel-rt)

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[Announce]  [Security Advisory] ALSA-2026:21745: kernel-rt security update (Important)
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Thu, 28 May 2026 21:01:49 +0000
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<0100019e7064b78a-e4bd766a-a40c-4508-b16d-218f55f081b1-000000@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: Important
Release date: 2026-05-28

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: Bluetooth: MGMT: Fix possible UAFs (CVE-2025-39981)
  * kernel: ima: don't clear IMA_DIGSIG flag when setting or removing non-IMA xattr
(CVE-2025-68183)
  * kernel: ALSA: firewire-motu: fix buffer overflow in hwdep read for DSP events
(CVE-2025-68347)
  * kernel: libceph: make decode_pool() more resilient against corrupted osdmaps (CVE-2025-71116)
  * kernel: Linux kernel: Denial of service and memory corruption in RDMA umad (CVE-2026-23243)
  * kernel: Linux kernel: Use-after-free in traffic control (act_ct) may lead to denial of service
or privilege escalation (CVE-2026-23270)
  * kernel: netfilter: nf_conntrack_h323: check for zero length in DecodeQ931() (CVE-2026-23455)
  * kernel: Bluetooth: SCO: Fix use-after-free in sco_recv_frame() due to missing sock_hold
(CVE-2026-31408)
  * kernel: can: raw: fix ro->uniq use-after-free in raw_rcv() (CVE-2026-31532)
  * kernel: net: sched: act_csum: validate nested VLAN headers (CVE-2026-31684)
  * kernel: netfilter: ip6t_eui64: reject invalid MAC header for all packets (CVE-2026-31685)
  * kernel: netfilter: nf_conntrack_helper: pass helper to expect cleanup (CVE-2026-43027)
  * kernel: Bluetooth: MGMT: validate LTK enc_size on load (CVE-2026-43020)
  * kernel: HID: wacom: fix out-of-bounds read in wacom_intuos_bt_irq (CVE-2026-43051)
  * kernel: smb: client: validate the whole DACL before rewriting it in cifsacl (CVE-2026-31709)
  * kernel: md/bitmap: fix GPF in write_page caused by resize race (CVE-2026-43163)
  * kernel: netfilter: xt_tcpmss: check remaining length before reading optlen (CVE-2026-43190)
  * kernel: xfs: fix freemap adjustments when adding xattrs to leaf blocks (CVE-2026-43158)


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-2026-21745.html

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AlmaLinux Team
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