Skip to content
OpenAdvisories
Critical RHSA-2026:0533 12 CVEs

Red Hat Security Advisory: kernel security update

Published Jan 14, 2026 · Updated Sep 25, 2026

Ecosystem: Red Hat

Fixed packages 48

ReleasePackageFixed in
Red Hat · RHEL 8.4 AUS rhel_aus:8.4::baseos bpftool 0:4.18.0-305.183.1.el8_4
Red Hat · RHEL 8.4 AUS rhel_aus:8.4::baseos bpftool-debuginfo 0:4.18.0-305.183.1.el8_4
Red Hat · RHEL 8.4 AUS rhel_aus:8.4::baseos kernel 0:4.18.0-305.183.1.el8_4
Red Hat · RHEL 8.4 AUS rhel_aus:8.4::baseos kernel-abi-stablelists 0:4.18.0-305.183.1.el8_4
Red Hat · RHEL 8.4 AUS rhel_aus:8.4::baseos kernel-core 0:4.18.0-305.183.1.el8_4
Red Hat · RHEL 8.4 AUS rhel_aus:8.4::baseos kernel-debug 0:4.18.0-305.183.1.el8_4
Red Hat · RHEL 8.4 AUS rhel_aus:8.4::baseos kernel-debug-core 0:4.18.0-305.183.1.el8_4
Red Hat · RHEL 8.4 AUS rhel_aus:8.4::baseos kernel-debug-debuginfo 0:4.18.0-305.183.1.el8_4
Red Hat · RHEL 8.4 AUS rhel_aus:8.4::baseos kernel-debug-devel 0:4.18.0-305.183.1.el8_4
Red Hat · RHEL 8.4 AUS rhel_aus:8.4::baseos kernel-debug-modules 0:4.18.0-305.183.1.el8_4
Red Hat · RHEL 8.4 AUS rhel_aus:8.4::baseos kernel-debug-modules-extra 0:4.18.0-305.183.1.el8_4
Red Hat · RHEL 8.4 AUS rhel_aus:8.4::baseos kernel-debuginfo 0:4.18.0-305.183.1.el8_4
Red Hat · RHEL 8.4 AUS rhel_aus:8.4::baseos kernel-debuginfo-common-x86_64 0:4.18.0-305.183.1.el8_4
Red Hat · RHEL 8.4 AUS rhel_aus:8.4::baseos kernel-devel 0:4.18.0-305.183.1.el8_4
Red Hat · RHEL 8.4 AUS rhel_aus:8.4::baseos kernel-doc 0:4.18.0-305.183.1.el8_4
Red Hat · RHEL 8.4 AUS rhel_aus:8.4::baseos kernel-modules 0:4.18.0-305.183.1.el8_4
Red Hat · RHEL 8.4 AUS rhel_aus:8.4::baseos kernel-modules-extra 0:4.18.0-305.183.1.el8_4
Red Hat · RHEL 8.4 AUS rhel_aus:8.4::baseos kernel-tools 0:4.18.0-305.183.1.el8_4
Red Hat · RHEL 8.4 AUS rhel_aus:8.4::baseos kernel-tools-debuginfo 0:4.18.0-305.183.1.el8_4
Red Hat · RHEL 8.4 AUS rhel_aus:8.4::baseos kernel-tools-libs 0:4.18.0-305.183.1.el8_4
Red Hat · RHEL 8.4 AUS rhel_aus:8.4::baseos perf 0:4.18.0-305.183.1.el8_4
Red Hat · RHEL 8.4 AUS rhel_aus:8.4::baseos perf-debuginfo 0:4.18.0-305.183.1.el8_4
Red Hat · RHEL 8.4 AUS rhel_aus:8.4::baseos python3-perf 0:4.18.0-305.183.1.el8_4
Red Hat · RHEL 8.4 AUS rhel_aus:8.4::baseos python3-perf-debuginfo 0:4.18.0-305.183.1.el8_4
Red Hat · RHEL 8.4 EUS Long Life rhel_eus_long_life:8.4::baseos bpftool 0:4.18.0-305.183.1.el8_4
Red Hat · RHEL 8.4 EUS Long Life rhel_eus_long_life:8.4::baseos bpftool-debuginfo 0:4.18.0-305.183.1.el8_4
Red Hat · RHEL 8.4 EUS Long Life rhel_eus_long_life:8.4::baseos kernel 0:4.18.0-305.183.1.el8_4
Red Hat · RHEL 8.4 EUS Long Life rhel_eus_long_life:8.4::baseos kernel-abi-stablelists 0:4.18.0-305.183.1.el8_4
Red Hat · RHEL 8.4 EUS Long Life rhel_eus_long_life:8.4::baseos kernel-core 0:4.18.0-305.183.1.el8_4
Red Hat · RHEL 8.4 EUS Long Life rhel_eus_long_life:8.4::baseos kernel-debug 0:4.18.0-305.183.1.el8_4
Red Hat · RHEL 8.4 EUS Long Life rhel_eus_long_life:8.4::baseos kernel-debug-core 0:4.18.0-305.183.1.el8_4
Red Hat · RHEL 8.4 EUS Long Life rhel_eus_long_life:8.4::baseos kernel-debug-debuginfo 0:4.18.0-305.183.1.el8_4
Red Hat · RHEL 8.4 EUS Long Life rhel_eus_long_life:8.4::baseos kernel-debug-devel 0:4.18.0-305.183.1.el8_4
Red Hat · RHEL 8.4 EUS Long Life rhel_eus_long_life:8.4::baseos kernel-debug-modules 0:4.18.0-305.183.1.el8_4
Red Hat · RHEL 8.4 EUS Long Life rhel_eus_long_life:8.4::baseos kernel-debug-modules-extra 0:4.18.0-305.183.1.el8_4
Red Hat · RHEL 8.4 EUS Long Life rhel_eus_long_life:8.4::baseos kernel-debuginfo 0:4.18.0-305.183.1.el8_4
Red Hat · RHEL 8.4 EUS Long Life rhel_eus_long_life:8.4::baseos kernel-debuginfo-common-x86_64 0:4.18.0-305.183.1.el8_4
Red Hat · RHEL 8.4 EUS Long Life rhel_eus_long_life:8.4::baseos kernel-devel 0:4.18.0-305.183.1.el8_4
Red Hat · RHEL 8.4 EUS Long Life rhel_eus_long_life:8.4::baseos kernel-doc 0:4.18.0-305.183.1.el8_4
Red Hat · RHEL 8.4 EUS Long Life rhel_eus_long_life:8.4::baseos kernel-modules 0:4.18.0-305.183.1.el8_4
Red Hat · RHEL 8.4 EUS Long Life rhel_eus_long_life:8.4::baseos kernel-modules-extra 0:4.18.0-305.183.1.el8_4
Red Hat · RHEL 8.4 EUS Long Life rhel_eus_long_life:8.4::baseos kernel-tools 0:4.18.0-305.183.1.el8_4
Red Hat · RHEL 8.4 EUS Long Life rhel_eus_long_life:8.4::baseos kernel-tools-debuginfo 0:4.18.0-305.183.1.el8_4
Red Hat · RHEL 8.4 EUS Long Life rhel_eus_long_life:8.4::baseos kernel-tools-libs 0:4.18.0-305.183.1.el8_4
Red Hat · RHEL 8.4 EUS Long Life rhel_eus_long_life:8.4::baseos perf 0:4.18.0-305.183.1.el8_4
Red Hat · RHEL 8.4 EUS Long Life rhel_eus_long_life:8.4::baseos perf-debuginfo 0:4.18.0-305.183.1.el8_4
Red Hat · RHEL 8.4 EUS Long Life rhel_eus_long_life:8.4::baseos python3-perf 0:4.18.0-305.183.1.el8_4
Red Hat · RHEL 8.4 EUS Long Life rhel_eus_long_life:8.4::baseos python3-perf-debuginfo 0:4.18.0-305.183.1.el8_4

Vulnerabilities 12

  • Critical 9.8
    CVE-2025-68285

    libceph: fix potential use-after-free in have_mon_and_osd_map()

    In the Linux kernel, the following vulnerability has been resolved: libceph: fix potential use-after-free in have_mon_and_osd_map() The wait loop in __ceph_open_session() can race with the client receiving a new monmap or osdmap shortly after the initial map …

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  • High 8.8
    CVE-2023-53675

    scsi: ses: Fix possible desc_ptr out-of-bounds accesses

    In the Linux kernel, the following vulnerability has been resolved: scsi: ses: Fix possible desc_ptr out-of-bounds accesses Sanitize possible desc_ptr out-of-bounds accesses in ses_enclosure_data_process().

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  • High 8.2
    CVE-2023-53705

    ipv6: Fix out-of-bounds access in ipv6_find_tlv()

    In the Linux kernel, the following vulnerability has been resolved: ipv6: Fix out-of-bounds access in ipv6_find_tlv() optlen is fetched without checking whether there is more than one byte to parse. It can lead to out-of-bounds access. Found by InfoTeCS on be…

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  • High 7.8
    CVE-2025-38051

    smb: client: Fix use-after-free in cifs_fill_dirent

    In the Linux kernel, the following vulnerability has been resolved: smb: client: Fix use-after-free in cifs_fill_dirent There is a race condition in the readdir concurrency process, which may access the rsp buffer after it has been released, triggering the fo…

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  • High 7.8
    CVE-2025-39825

    smb: client: fix race with concurrent opens in rename(2)

    In the Linux kernel, the following vulnerability has been resolved: smb: client: fix race with concurrent opens in rename(2) Besides sending the rename request to the server, the rename process also involves closing any deferred close, waiting for outstanding…

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  • High 7.8
    CVE-2025-39993

    media: rc: fix races with imon_disconnect()

    In the Linux kernel, the following vulnerability has been resolved: media: rc: fix races with imon_disconnect() Syzbot reports a KASAN issue as below: BUG: KASAN: use-after-free in __create_pipe include/linux/usb.h:1945 [inline] BUG: KASAN: use-after-free in …

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  • High 7.5
    CVE-2023-53680

    NFSD: Avoid calling OPDESC() with ops->opnum == OP_ILLEGAL

    In the Linux kernel, the following vulnerability has been resolved: NFSD: Avoid calling OPDESC() with ops->opnum == OP_ILLEGAL OPDESC() simply indexes into nfsd4_ops[] by the op's operation number, without range checking that value. It assumes callers are car…

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  • High 7.1
    CVE-2025-39817

    efivarfs: Fix slab-out-of-bounds in efivarfs_d_compare

    In the Linux kernel, the following vulnerability has been resolved: efivarfs: Fix slab-out-of-bounds in efivarfs_d_compare Observed on kernel 6.6 (present on master as well): BUG: KASAN: slab-out-of-bounds in memcmp+0x98/0xd0 Call trace: kasan_check_range+0xe…

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  • Medium 4.7
    CVE-2023-53401

    mm: kmem: fix a NULL pointer dereference in obj_stock_flush_required()

    In the Linux kernel, the following vulnerability has been resolved: mm: kmem: fix a NULL pointer dereference in obj_stock_flush_required() KCSAN found an issue in obj_stock_flush_required(): stock->cached_objcg can be reset between the check and dereference: …

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  • Unscored —
    CVE-2023-53513

    nbd: fix incomplete validation of ioctl arg

    In the Linux kernel, the following vulnerability has been resolved: nbd: fix incomplete validation of ioctl arg We tested and found an alarm caused by nbd_ioctl arg without verification. The UBSAN warning calltrace like below: UBSAN: Undefined behaviour in fs…

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  • Unscored —
    CVE-2025-39883

    mm/memory-failure: fix VM_BUG_ON_PAGE(PagePoisoned(page)) when unpoison memory

    In the Linux kernel, the following vulnerability has been resolved: mm/memory-failure: fix VM_BUG_ON_PAGE(PagePoisoned(page)) when unpoison memory When I did memory failure tests, below panic occurs: page dumped because: VM_BUG_ON_PAGE(PagePoisoned(page)) ker…

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  • Unscored —
    CVE-2025-39898 Rejected

    This CVE ID has been rejected or withdrawn by its CVE Numbering Authority.

    linux-raspi2 linux-hwe linux-azure linux-riscv Ubuntu

References

  • article
    https://access.redhat.com/security/updates/classification/#important
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2373329
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2395792
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2395805
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2396417
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2397553
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2400598
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2400795
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2402213
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2402293
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2404121
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2405713
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2422801
  • advisory
    https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_0533.json
  • report
    https://access.redhat.com/security/cve/CVE-2023-53401
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2023-53401
  • advisory
    https://nvd.nist.gov/vuln/detail/CVE-2023-53401
  • article
    https://lore.kernel.org/linux-cve-announce/2025091800-CVE-2023-53401-b668@gregkh/T
  • report
    https://access.redhat.com/security/cve/CVE-2023-53513
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2023-53513
  • advisory
    https://nvd.nist.gov/vuln/detail/CVE-2023-53513
  • article
    https://lore.kernel.org/linux-cve-announce/2025100130-CVE-2023-53513-4667@gregkh/T
  • report
    https://access.redhat.com/security/cve/CVE-2023-53675
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2023-53675
  • advisory
    https://nvd.nist.gov/vuln/detail/CVE-2023-53675
  • article
    https://lore.kernel.org/linux-cve-announce/2025100707-CVE-2023-53675-e7ac@gregkh/T
  • report
    https://access.redhat.com/security/cve/CVE-2023-53680
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2023-53680
  • advisory
    https://nvd.nist.gov/vuln/detail/CVE-2023-53680
  • article
    https://lore.kernel.org/linux-cve-announce/2025100708-CVE-2023-53680-501d@gregkh/T
  • report
    https://access.redhat.com/security/cve/CVE-2023-53705
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2023-53705
  • advisory
    https://nvd.nist.gov/vuln/detail/CVE-2023-53705
  • article
    https://lore.kernel.org/linux-cve-announce/2025102212-CVE-2023-53705-38d9@gregkh/T
  • report
    https://access.redhat.com/security/cve/CVE-2025-38051
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2025-38051
  • advisory
    https://nvd.nist.gov/vuln/detail/CVE-2025-38051
  • article
    https://lore.kernel.org/linux-cve-announce/2025061831-CVE-2025-38051-77da@gregkh/T
  • report
    https://access.redhat.com/security/cve/CVE-2025-39817