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CVE-2026-43206VulnerabilityPublished Updated

Red Hat Security Advisory: kernel security, bug fix, and enhancement update

Affects Red Hat kernel security,Source GCVE Database

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Mentioned vulnerabilities

Authoritative record:CVE-2026-43206· High 7.8

Not known to be exploited · CVSS 7.8 High · fixed in Red Hat package updates : patch Red Hat kernel security, soon.

Data as of 29 Oct 2026, 08:26 UTC

CVSS 3.1 base score
7.8High
How severe the flaw is on the 0–10 CVSS scale.
Patch
Available – fixed in de8d7a25cd2eb5875b1d8d4fbc7fe4b4138b781f, bfcd6b53e1f4feb182952f4ff9a137c36ceaf20b, b4034442cb090e4a980bdcc1540948606cbc951b +5
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 6 May 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 29 Oct 2026.

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

ProductAffectedFixed in
LinuxLinuxAffected
  • ≥ 0fc8011f89feb8b2c3008583b777d097e1974660, < de8d7a25cd2eb5875b1d8d4fbc7fe4b4138b781f
Fixed in
  • de8d7a25cd2eb5875b1d8d4fbc7fe4b4138b781f
LinuxLinuxAffected
  • ≥ 0fc8011f89feb8b2c3008583b777d097e1974660, < bfcd6b53e1f4feb182952f4ff9a137c36ceaf20b
Fixed in
  • bfcd6b53e1f4feb182952f4ff9a137c36ceaf20b
LinuxLinuxAffected
  • ≥ 0fc8011f89feb8b2c3008583b777d097e1974660, < b4034442cb090e4a980bdcc1540948606cbc951b
Fixed in
  • b4034442cb090e4a980bdcc1540948606cbc951b
LinuxLinuxAffected
  • ≥ 0fc8011f89feb8b2c3008583b777d097e1974660, < 4857c37c7ba9aa38b9a4c694e8bd8d0091c87940
Fixed in
  • 4857c37c7ba9aa38b9a4c694e8bd8d0091c87940
LinuxLinuxAffected
  • ≥ 0fc8011f89feb8b2c3008583b777d097e1974660, < 75fb57efdd7863fffbc39db23e9cad7aafda26ed
Fixed in
  • 75fb57efdd7863fffbc39db23e9cad7aafda26ed
LinuxLinuxAffected
  • ≥ 0fc8011f89feb8b2c3008583b777d097e1974660, < 8a70a26c9f34baea6c3199a9862ddaff4554a96d
Fixed in
  • 8a70a26c9f34baea6c3199a9862ddaff4554a96d

Description

The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fix(es): * kernel: drm/amdkfd: Fix out-of-bounds write in kfd_event_page_set() (CVE-2026-43206) * kernel: drm/amdgpu: Refactor amdgpu_gem_va_ioctl for Handling Last Fence Update and Timeline Management v4 (CVE-2026-43237) * kernel: crypto: pcrypt - Fix handling of MAY_BACKLOG requests (CVE-2026-43493) * kernel: udf: fix partition descriptor append bookkeeping (CVE-2026-45991) * kernel: drm/amdkfd: Fix watch_id bounds checking in debug address watch v2 (CVE-2026-45878) * kernel: smb/client: fix out-of-bounds read in symlink_data() (CVE-2026-46185) * kernel: sched/psi: fix race between file release and pressure write (CVE-2026-52991) * kernel: drm/amdkfd: Fix buffer overflow in SDMA queue checkpoint/restore on GFX11 (CVE-2026-53143) * kernel: drm/amd/display: Clamp VBIOS HDMI retimer register count to array size (CVE-2026-53136) * kernel: drm/amd/display: Use krealloc_array() in dal_vector_reserve() (CVE-2026-53329) * kernel: drm/i915/gem: Fix phys BO pread/pwrite with offset (CVE-2026-53356) * kernel: drm/amdgpu: zero-initialize GART table on allocation (CVE-2026-53374) * kernel: drm/i915: Fix potential UAF in TTM object purge (CVE-2026-63884) * kernel: scsi: target: iscsi: Validate CHAP_R length before base64 decode (CVE-2026-63886) * kernel: memfd: deny writeable mappings when implying SEAL_WRITE (CVE-2026-63952) * kernel: scsi: target: iscsi: Fix CRC overread and double-free in iscsit_handle_text_cmd() (CVE-2026-63888) * kernel: blk-mq: pop cached request if it is usable (CVE-2026-64017) * kernel: drm/amdgpu: fix amdgpu_hmm_range_get_pages (CVE-2026-63879) * kernel: drm/amd/display: Validate payload length and link_index in dc_process_dmub_aux_transfer_async (CVE-2026-64219) * kernel: smb: client: fix double-free in SMB2_open() replay (CVE-2026-64382) * kernel: smb: client: mask server-provided mode to 07777 in modefromsid (CVE-2026-64379) * kernel: smb: client: fix query_info() replay double-free (CVE-2026-64386) * kernel: posix-cpu-timers: Prevent UAF caused by non-leader exec() race (CVE-2026-64560) * kernel: smb/client: handle overlapping allocated ranges in fallocate (CVE-2026-68388) Bug Fix(es) and Enhancement(s): * CLONE - RHEL 10.2.z xfs: fix exchange-range reflink flag clearing issue with INO1_WRITTEN (JIRA:RHEL-223954) * vhost: reset the vring metadata cache on vring reconfiguration [rhel-10.2.z] (JIRA:RHEL-224545) * cifs: periodic IO errors when rename races with lease break [rhel-10.2.z] (JIRA:RHEL-235459) * cifs: smb1 directory listings from xp server returning EINVAL and EIO [rhel-10.2.z] (JIRA:RHEL-235812) 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.

References

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