AlmaLinux alert ALSA-2026:21556 (kernel)

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[Announce]  [Security Advisory] ALSA-2026:21556: kernel security update (Important)
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Mon, 08 Jun 2026 00:05:04 +0000
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<0100019ea48c165a-bac1b13d-1775-45de-97bd-0ab5454914d6-000000@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: 9
Type: Security
Severity: Important
Release date: 2026-06-07

Summary:

The kernel packages contain the Linux kernel, the core of any Linux operating system.  

Security Fix(es):  

  * kernel: proc: use the same treatment to check proc_lseek as ones for proc_read_iter et.al
(CVE-2025-38653)
  * kernel: ima: don't clear IMA_DIGSIG flag when setting or removing non-IMA xattr
(CVE-2025-68183)
  * kernel: nbd: defer config unlock in nbd_genl_connect (CVE-2025-68366)
  * kernel: crypto: asymmetric_keys - prevent overflow in asymmetric_key_generate_id
(CVE-2025-68724)
  * kernel: iommu: disable SVA when CONFIG_X86 is set (CVE-2025-71089)
  * kernel: netfilter: nf_tables: release flowtable after rcu grace period on error
(CVE-2026-23392)
  * 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: 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: Bluetooth: SCO: fix race conditions in sco_sock_connect() (CVE-2026-43023)
  * kernel: wifi: brcmfmac: validate bsscfg indices in IF events (CVE-2026-43110)
  * 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)
  * kernel: mm/page_alloc: clear page->private in free_pages_prepare() (CVE-2026-43303)


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/9/ALSA-2026-21556.html

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AlmaLinux Team
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