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OpenAdvisories
High ALSA-2025:8643 6 CVEs

Important: kernel security update

Published Jun 9, 2025 · Updated Oct 29, 2026

Ecosystem: AlmaLinux

Summary

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

Security Fix(es):

* kernel: net: gso: fix ownership in __udp_gso_segment (CVE-2025-21926)
* kernel: vlan: enforce underlying device type (CVE-2025-21920)
* kernel: xsk: fix an integer overflow in xp_create_and_assign_umem() (CVE-2025-21997)
* kernel: net: fix geneve_opt length integer overflow (CVE-2025-22055)
* kernel: ext4: fix OOB read when checking dotdot dir (CVE-2025-37785)
* kernel: wifi: ath12k: Fix invalid data access in ath12k_dp_rx_h_undecap_nwifi (CVE-2025-37943)

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 76

ReleasePackageFixed in
AlmaLinux · 9 kernel 5.14.0-570.21.1.el9_6
AlmaLinux · 9 kernel-64k 5.14.0-570.21.1.el9_6
AlmaLinux · 9 kernel-64k-core 5.14.0-570.21.1.el9_6
AlmaLinux · 9 kernel-64k-debug 5.14.0-570.21.1.el9_6
AlmaLinux · 9 kernel-64k-debug-core 5.14.0-570.21.1.el9_6
AlmaLinux · 9 kernel-64k-debug-devel 5.14.0-570.21.1.el9_6
AlmaLinux · 9 kernel-64k-debug-devel-matched 5.14.0-570.21.1.el9_6
AlmaLinux · 9 kernel-64k-debug-modules 5.14.0-570.21.1.el9_6
AlmaLinux · 9 kernel-64k-debug-modules-core 5.14.0-570.21.1.el9_6
AlmaLinux · 9 kernel-64k-debug-modules-extra 5.14.0-570.21.1.el9_6
AlmaLinux · 9 kernel-64k-devel 5.14.0-570.21.1.el9_6
AlmaLinux · 9 kernel-64k-devel-matched 5.14.0-570.21.1.el9_6
AlmaLinux · 9 kernel-64k-modules 5.14.0-570.21.1.el9_6
AlmaLinux · 9 kernel-64k-modules-core 5.14.0-570.21.1.el9_6
AlmaLinux · 9 kernel-64k-modules-extra 5.14.0-570.21.1.el9_6
AlmaLinux · 9 kernel-abi-stablelists 5.14.0-570.21.1.el9_6
AlmaLinux · 9 kernel-core 5.14.0-570.21.1.el9_6
AlmaLinux · 9 kernel-cross-headers 5.14.0-570.21.1.el9_6
AlmaLinux · 9 kernel-debug 5.14.0-570.21.1.el9_6
AlmaLinux · 9 kernel-debug-core 5.14.0-570.21.1.el9_6
AlmaLinux · 9 kernel-debug-devel 5.14.0-570.21.1.el9_6
AlmaLinux · 9 kernel-debug-devel-matched 5.14.0-570.21.1.el9_6
AlmaLinux · 9 kernel-debug-modules 5.14.0-570.21.1.el9_6
AlmaLinux · 9 kernel-debug-modules-core 5.14.0-570.21.1.el9_6
AlmaLinux · 9 kernel-debug-modules-extra 5.14.0-570.21.1.el9_6
AlmaLinux · 9 kernel-debug-uki-virt 5.14.0-570.21.1.el9_6
AlmaLinux · 9 kernel-devel 5.14.0-570.21.1.el9_6
AlmaLinux · 9 kernel-devel-matched 5.14.0-570.21.1.el9_6
AlmaLinux · 9 kernel-doc 5.14.0-570.21.1.el9_6
AlmaLinux · 9 kernel-headers 5.14.0-570.21.1.el9_6
AlmaLinux · 9 kernel-modules 5.14.0-570.21.1.el9_6
AlmaLinux · 9 kernel-modules-core 5.14.0-570.21.1.el9_6
AlmaLinux · 9 kernel-modules-extra 5.14.0-570.21.1.el9_6
AlmaLinux · 9 kernel-rt 5.14.0-570.21.1.el9_6
AlmaLinux · 9 kernel-rt-64k 5.14.0-570.21.1.el9_6
AlmaLinux · 9 kernel-rt-64k-core 5.14.0-570.21.1.el9_6
AlmaLinux · 9 kernel-rt-64k-debug 5.14.0-570.21.1.el9_6
AlmaLinux · 9 kernel-rt-64k-debug-core 5.14.0-570.21.1.el9_6
AlmaLinux · 9 kernel-rt-64k-debug-devel 5.14.0-570.21.1.el9_6
AlmaLinux · 9 kernel-rt-64k-debug-modules 5.14.0-570.21.1.el9_6
AlmaLinux · 9 kernel-rt-64k-debug-modules-core 5.14.0-570.21.1.el9_6
AlmaLinux · 9 kernel-rt-64k-debug-modules-extra 5.14.0-570.21.1.el9_6
AlmaLinux · 9 kernel-rt-64k-devel 5.14.0-570.21.1.el9_6
AlmaLinux · 9 kernel-rt-64k-modules 5.14.0-570.21.1.el9_6
AlmaLinux · 9 kernel-rt-64k-modules-core 5.14.0-570.21.1.el9_6
AlmaLinux · 9 kernel-rt-64k-modules-extra 5.14.0-570.21.1.el9_6
AlmaLinux · 9 kernel-rt-core 5.14.0-570.21.1.el9_6
AlmaLinux · 9 kernel-rt-debug 5.14.0-570.21.1.el9_6
AlmaLinux · 9 kernel-rt-debug-core 5.14.0-570.21.1.el9_6
AlmaLinux · 9 kernel-rt-debug-devel 5.14.0-570.21.1.el9_6
AlmaLinux · 9 kernel-rt-debug-kvm 5.14.0-570.21.1.el9_6
AlmaLinux · 9 kernel-rt-debug-modules 5.14.0-570.21.1.el9_6
AlmaLinux · 9 kernel-rt-debug-modules-core 5.14.0-570.21.1.el9_6
AlmaLinux · 9 kernel-rt-debug-modules-extra 5.14.0-570.21.1.el9_6
AlmaLinux · 9 kernel-rt-devel 5.14.0-570.21.1.el9_6
AlmaLinux · 9 kernel-rt-kvm 5.14.0-570.21.1.el9_6
AlmaLinux · 9 kernel-rt-modules 5.14.0-570.21.1.el9_6
AlmaLinux · 9 kernel-rt-modules-core 5.14.0-570.21.1.el9_6
AlmaLinux · 9 kernel-rt-modules-extra 5.14.0-570.21.1.el9_6
AlmaLinux · 9 kernel-tools 5.14.0-570.21.1.el9_6
AlmaLinux · 9 kernel-tools-libs 5.14.0-570.21.1.el9_6
AlmaLinux · 9 kernel-tools-libs-devel 5.14.0-570.21.1.el9_6
AlmaLinux · 9 kernel-uki-virt 5.14.0-570.21.1.el9_6
AlmaLinux · 9 kernel-uki-virt-addons 5.14.0-570.21.1.el9_6
AlmaLinux · 9 kernel-zfcpdump 5.14.0-570.21.1.el9_6
AlmaLinux · 9 kernel-zfcpdump-core 5.14.0-570.21.1.el9_6
AlmaLinux · 9 kernel-zfcpdump-devel 5.14.0-570.21.1.el9_6
AlmaLinux · 9 kernel-zfcpdump-devel-matched 5.14.0-570.21.1.el9_6
AlmaLinux · 9 kernel-zfcpdump-modules 5.14.0-570.21.1.el9_6
AlmaLinux · 9 kernel-zfcpdump-modules-core 5.14.0-570.21.1.el9_6
AlmaLinux · 9 kernel-zfcpdump-modules-extra 5.14.0-570.21.1.el9_6
AlmaLinux · 9 libperf 5.14.0-570.21.1.el9_6
AlmaLinux · 9 perf 5.14.0-570.21.1.el9_6
AlmaLinux · 9 python3-perf 5.14.0-570.21.1.el9_6
AlmaLinux · 9 rtla 5.14.0-570.21.1.el9_6
AlmaLinux · 9 rv 5.14.0-570.21.1.el9_6

Vulnerabilities 6

  • High 8.8
    CVE-2025-37943

    wifi: ath12k: Fix invalid data access in ath12k_dp_rx_h_undecap_nwifi

    In the Linux kernel, the following vulnerability has been resolved: wifi: ath12k: Fix invalid data access in ath12k_dp_rx_h_undecap_nwifi In certain cases, hardware might provide packets with a length greater than the maximum native Wi-Fi header length. This …

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  • High 7.8
    CVE-2025-21926

    net: gso: fix ownership in __udp_gso_segment

    In the Linux kernel, the following vulnerability has been resolved: net: gso: fix ownership in __udp_gso_segment In __udp_gso_segment the skb destructor is removed before segmenting the skb but the socket reference is kept as-is. This is an issue if the origi…

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  • High 7.8
    CVE-2025-37785

    ext4: fix OOB read when checking dotdot dir

    In the Linux kernel, the following vulnerability has been resolved: ext4: fix OOB read when checking dotdot dir Mounting a corrupted filesystem with directory which contains '.' dir entry with rec_len == block size results in out-of-bounds read (later on, whe…

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  • High 7.1
    CVE-2025-21920

    vlan: enforce underlying device type

    In the Linux kernel, the following vulnerability has been resolved: vlan: enforce underlying device type Currently, VLAN devices can be created on top of non-ethernet devices. Besides the fact that it doesn't make much sense, this also causes a bug which leak…

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  • High 7.1
    CVE-2025-22055

    net: fix geneve_opt length integer overflow

    In the Linux kernel, the following vulnerability has been resolved: net: fix geneve_opt length integer overflow struct geneve_opt uses 5 bit length for each single option, which means every vary size option should be smaller than 128 bytes. However, all curre…

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  • Medium 5.5
    CVE-2025-21997

    xsk: fix an integer overflow in xp_create_and_assign_umem()

    In the Linux kernel, the following vulnerability has been resolved: xsk: fix an integer overflow in xp_create_and_assign_umem() Since the i and pool->chunk_size variables are of type 'u32', their product can wrap around and then be cast to 'u64'. This can lea…

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

References

  • report
    https://access.redhat.com/security/cve/CVE-2025-21920
  • report
    https://access.redhat.com/security/cve/CVE-2025-21926
  • report
    https://access.redhat.com/security/cve/CVE-2025-21997
  • report
    https://access.redhat.com/security/cve/CVE-2025-22055
  • report
    https://access.redhat.com/security/cve/CVE-2025-37785
  • report
    https://access.redhat.com/security/cve/CVE-2025-37943
  • report
    https://bugzilla.redhat.com/2356587
  • report
    https://bugzilla.redhat.com/2356639
  • report
    https://bugzilla.redhat.com/2357143
  • report
    https://bugzilla.redhat.com/2360300
  • report
    https://bugzilla.redhat.com/2360921
  • report
    https://bugzilla.redhat.com/2367748
  • advisory
    https://errata.almalinux.org/9/ALSA-2025-8643.html