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High RLSA-2026:63128 6 CVEs

Important: kernel security update

Published Sep 5, 2026 · Updated Sep 5, 2026

Ecosystem: Rocky Linux

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 1

ReleasePackageFixed in
Rocky Linux · 10 kernel 0:6.12.0-211.51.1.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://bugzilla.redhat.com/show_bug.cgi?id=2502248
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2502235
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2513392
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2492447
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2520980
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2507046
  • advisory
    https://access.redhat.com/errata/RHSA-2026:63128