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High ALSA-2026:63128 6 CVEs

Important: kernel security update

Published Sep 3, 2026 · 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: Bluetooth: hci_ldisc: Clear HCI_UART_PROTO_INIT on error (CVE-2026-53073)
* kernel: exfat: fix potential use-after-free in exfat_find_dir_entry() (CVE-2026-63808)
* kernel: KEYS: fix overflow in keyctl_pkey_params_get_2() (CVE-2026-63824)
* kernel: smb: client: fix query directory replay double-free (CVE-2026-64387)
* kernel: iomap: fix out-of-bounds bitmap_set() with zero-length range (CVE-2026-68145)
* kernel: net: ipv6: use-after-free in fib6_rule_suppress due to stale res->rt6 pointer (CVE-2026-74581)

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 75

ReleasePackageFixed in
AlmaLinux · 10 kernel 6.12.0-211.51.1.el10_2
AlmaLinux · 10 kernel-64k 6.12.0-211.51.1.el10_2
AlmaLinux · 10 kernel-64k-core 6.12.0-211.51.1.el10_2
AlmaLinux · 10 kernel-64k-debug 6.12.0-211.51.1.el10_2
AlmaLinux · 10 kernel-64k-debug-core 6.12.0-211.51.1.el10_2
AlmaLinux · 10 kernel-64k-debug-devel 6.12.0-211.51.1.el10_2
AlmaLinux · 10 kernel-64k-debug-devel-matched 6.12.0-211.51.1.el10_2
AlmaLinux · 10 kernel-64k-debug-modules 6.12.0-211.51.1.el10_2
AlmaLinux · 10 kernel-64k-debug-modules-core 6.12.0-211.51.1.el10_2
AlmaLinux · 10 kernel-64k-debug-modules-extra 6.12.0-211.51.1.el10_2
AlmaLinux · 10 kernel-64k-devel 6.12.0-211.51.1.el10_2
AlmaLinux · 10 kernel-64k-devel-matched 6.12.0-211.51.1.el10_2
AlmaLinux · 10 kernel-64k-modules 6.12.0-211.51.1.el10_2
AlmaLinux · 10 kernel-64k-modules-core 6.12.0-211.51.1.el10_2
AlmaLinux · 10 kernel-64k-modules-extra 6.12.0-211.51.1.el10_2
AlmaLinux · 10 kernel-abi-stablelists 6.12.0-211.51.1.el10_2
AlmaLinux · 10 kernel-core 6.12.0-211.51.1.el10_2
AlmaLinux · 10 kernel-cross-headers 6.12.0-211.51.1.el10_2
AlmaLinux · 10 kernel-debug 6.12.0-211.51.1.el10_2
AlmaLinux · 10 kernel-debug-core 6.12.0-211.51.1.el10_2
AlmaLinux · 10 kernel-debug-devel 6.12.0-211.51.1.el10_2
AlmaLinux · 10 kernel-debug-devel-matched 6.12.0-211.51.1.el10_2
AlmaLinux · 10 kernel-debug-modules 6.12.0-211.51.1.el10_2
AlmaLinux · 10 kernel-debug-modules-core 6.12.0-211.51.1.el10_2
AlmaLinux · 10 kernel-debug-modules-extra 6.12.0-211.51.1.el10_2
AlmaLinux · 10 kernel-debug-uki-virt 6.12.0-211.51.1.el10_2
AlmaLinux · 10 kernel-devel 6.12.0-211.51.1.el10_2
AlmaLinux · 10 kernel-devel-matched 6.12.0-211.51.1.el10_2
AlmaLinux · 10 kernel-doc 6.12.0-211.51.1.el10_2
AlmaLinux · 10 kernel-headers 6.12.0-211.51.1.el10_2
AlmaLinux · 10 kernel-modules 6.12.0-211.51.1.el10_2
AlmaLinux · 10 kernel-modules-core 6.12.0-211.51.1.el10_2
AlmaLinux · 10 kernel-modules-extra 6.12.0-211.51.1.el10_2
AlmaLinux · 10 kernel-modules-extra-matched 6.12.0-211.51.1.el10_2
AlmaLinux · 10 kernel-rt 6.12.0-211.51.1.el10_2
AlmaLinux · 10 kernel-rt-64k 6.12.0-211.51.1.el10_2
AlmaLinux · 10 kernel-rt-64k-core 6.12.0-211.51.1.el10_2
AlmaLinux · 10 kernel-rt-64k-debug 6.12.0-211.51.1.el10_2
AlmaLinux · 10 kernel-rt-64k-debug-core 6.12.0-211.51.1.el10_2
AlmaLinux · 10 kernel-rt-64k-debug-devel 6.12.0-211.51.1.el10_2
AlmaLinux · 10 kernel-rt-64k-debug-modules 6.12.0-211.51.1.el10_2
AlmaLinux · 10 kernel-rt-64k-debug-modules-core 6.12.0-211.51.1.el10_2
AlmaLinux · 10 kernel-rt-64k-debug-modules-extra 6.12.0-211.51.1.el10_2
AlmaLinux · 10 kernel-rt-64k-devel 6.12.0-211.51.1.el10_2
AlmaLinux · 10 kernel-rt-64k-modules 6.12.0-211.51.1.el10_2
AlmaLinux · 10 kernel-rt-64k-modules-core 6.12.0-211.51.1.el10_2
AlmaLinux · 10 kernel-rt-64k-modules-extra 6.12.0-211.51.1.el10_2
AlmaLinux · 10 kernel-rt-core 6.12.0-211.51.1.el10_2
AlmaLinux · 10 kernel-rt-debug 6.12.0-211.51.1.el10_2
AlmaLinux · 10 kernel-rt-debug-core 6.12.0-211.51.1.el10_2
AlmaLinux · 10 kernel-rt-debug-devel 6.12.0-211.51.1.el10_2
AlmaLinux · 10 kernel-rt-debug-modules 6.12.0-211.51.1.el10_2
AlmaLinux · 10 kernel-rt-debug-modules-core 6.12.0-211.51.1.el10_2
AlmaLinux · 10 kernel-rt-debug-modules-extra 6.12.0-211.51.1.el10_2
AlmaLinux · 10 kernel-rt-devel 6.12.0-211.51.1.el10_2
AlmaLinux · 10 kernel-rt-modules 6.12.0-211.51.1.el10_2
AlmaLinux · 10 kernel-rt-modules-core 6.12.0-211.51.1.el10_2
AlmaLinux · 10 kernel-rt-modules-extra 6.12.0-211.51.1.el10_2
AlmaLinux · 10 kernel-tools 6.12.0-211.51.1.el10_2
AlmaLinux · 10 kernel-tools-libs 6.12.0-211.51.1.el10_2
AlmaLinux · 10 kernel-tools-libs-devel 6.12.0-211.51.1.el10_2
AlmaLinux · 10 kernel-uki-virt 6.12.0-211.51.1.el10_2
AlmaLinux · 10 kernel-uki-virt-addons 6.12.0-211.51.1.el10_2
AlmaLinux · 10 kernel-zfcpdump 6.12.0-211.51.1.el10_2
AlmaLinux · 10 kernel-zfcpdump-core 6.12.0-211.51.1.el10_2
AlmaLinux · 10 kernel-zfcpdump-devel 6.12.0-211.51.1.el10_2
AlmaLinux · 10 kernel-zfcpdump-devel-matched 6.12.0-211.51.1.el10_2
AlmaLinux · 10 kernel-zfcpdump-modules 6.12.0-211.51.1.el10_2
AlmaLinux · 10 kernel-zfcpdump-modules-core 6.12.0-211.51.1.el10_2
AlmaLinux · 10 kernel-zfcpdump-modules-extra 6.12.0-211.51.1.el10_2
AlmaLinux · 10 libperf 6.12.0-211.51.1.el10_2
AlmaLinux · 10 perf 6.12.0-211.51.1.el10_2
AlmaLinux · 10 python3-perf 6.12.0-211.51.1.el10_2
AlmaLinux · 10 rtla 6.12.0-211.51.1.el10_2
AlmaLinux · 10 rv 6.12.0-211.51.1.el10_2

Vulnerabilities 6

  • Critical 9.8
    CVE-2026-63808

    exfat: fix potential use-after-free in exfat_find_dir_entry()

    In the Linux kernel, the following vulnerability has been resolved: exfat: fix potential use-after-free in exfat_find_dir_entry() In exfat_find_dir_entry(), the buffer_head obtained from exfat_get_dentry() is released with brelse(bh) before the fall-through T…

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  • Critical 9.8
    CVE-2026-64387

    smb: client: fix query directory replay double-free

    In the Linux kernel, the following vulnerability has been resolved: smb: client: fix query directory replay double-free A response-bearing attempt can return a replayable error and free its response buffer. If SMB2_query_directory_init() fails before the next…

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  • Critical 9.8
    CVE-2026-74581

    net: ipv6: clear suppressed fib6 rule result

    In the Linux kernel, the following vulnerability has been resolved: net: ipv6: clear suppressed fib6 rule result fib6_rule_suppress() drops a suppressed route with ip6_rt_put_flags(), but leaves res->rt6 pointing at the released rt6_info. If no later rule sup…

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  • High 7.8
    CVE-2026-63824

    KEYS: fix overflow in keyctl_pkey_params_get_2()

    In the Linux kernel, the following vulnerability has been resolved: KEYS: fix overflow in keyctl_pkey_params_get_2() The length for the internal output buffer is calculated incorrectly, which can result overflow when a too small buffer is provided. Fix the bu…

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  • High 7.8
    CVE-2026-68145

    iomap: fix out-of-bounds bitmap_set() with zero-length range

    In the Linux kernel, the following vulnerability has been resolved: iomap: fix out-of-bounds bitmap_set() with zero-length range ifs_set_range_dirty() and ifs_set_range_uptodate() compute last_blk as (off + len - 1) >> i_blkbits. When off is 0 and len is 0, t…

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  • Unscored —
    CVE-2026-53073

    Bluetooth: hci_ldisc: Clear HCI_UART_PROTO_INIT on error

    In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_ldisc: Clear HCI_UART_PROTO_INIT on error When hci_register_dev() fails in hci_uart_register_dev() HCI_UART_PROTO_INIT is not cleared before calling hu->proto->close(hu) and se…

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu

References

  • report
    https://access.redhat.com/security/cve/CVE-2026-53073
  • report
    https://access.redhat.com/security/cve/CVE-2026-63808
  • report
    https://access.redhat.com/security/cve/CVE-2026-63824
  • report
    https://access.redhat.com/security/cve/CVE-2026-64387
  • report
    https://access.redhat.com/security/cve/CVE-2026-68145
  • report
    https://access.redhat.com/security/cve/CVE-2026-74581
  • report
    https://bugzilla.redhat.com/2492447
  • report
    https://bugzilla.redhat.com/2502235
  • report
    https://bugzilla.redhat.com/2502248
  • report
    https://bugzilla.redhat.com/2507046
  • report
    https://bugzilla.redhat.com/2513392
  • report
    https://bugzilla.redhat.com/2520980
  • advisory
    https://errata.almalinux.org/10/ALSA-2026-63128.html