All vulnerabilities
CVE-2026-98466

Linux: KVM: arm64: Transfer the hyp stack pages out of the host stage-2

Linux LinuxOperating systems
Open in ThreatlineRecord JSON
CVSS
NoneNot scored
ExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.20%Chance of exploitation activity in the next 30 days, higher than 9% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed in22df195bff84300a3f04813d6148765c77ac565aAlso 3a8c562892b96f35bba1e00d5e455a15963bbb92CVE List
Published18 Oct 2026Updated 19 Oct 2026CVE List

What fixes it

  • 22df195bff84300a3f04813d6148765c77ac565aLinuxCVE List
  • 3a8c562892b96f35bba1e00d5e455a15963bbb92LinuxCVE List

A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.

Description

In the Linux kernel, the following vulnerability has been resolved:

KVM: arm64: Transfer the hyp stack pages out of the host stage-2

fix_host_ownership() walks only the linear-map alias of each memblock region, and the per-CPU hyp stack, mapped in the private VA range for its guard page, has none.

Walk each stack's VA range with the same walker.

Text from CVE List

Affected versions 8

  • Linuxaffected: 1a919b17ef012ca0572bae759c27e5ea02bfb47f before e5dd2a91a7ae3a276e6d79806127e923936e241bCVE List
  • Linuxaffected: 1a919b17ef012ca0572bae759c27e5ea02bfb47f before 22df195bff84300a3f04813d6148765c77ac565aCVE List
  • Linuxaffected: 1a919b17ef012ca0572bae759c27e5ea02bfb47f before 3a8c562892b96f35bba1e00d5e455a15963bbb92CVE List
  • Linuxaffected: 5.19CVE List
  • Linuxunaffected: all versions before 5.19CVE List
  • Linuxunaffected: 6.18.55 through 6.18.*CVE List
  • Linuxunaffected: 7.2.9 through 7.2.*CVE List
  • Linuxunaffected: 7.3CVE List

References 3