CVE-2026-31553

KVM: arm64: Fix the descriptor address in __kvm_at_swap_desc()

State: Published
Severity: 8.8 High
Published: Apr 24, 2026
Updated: Aug 5, 2026
Reserved: Mar 9, 2026

Description

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

KVM: arm64: Fix the descriptor address in __kvm_at_swap_desc()

Using "(u64 __user *)hva + offset" to get the virtual addresses of S1/S2 descriptors looks really wrong, if offset is not zero. What we want to get for swapping is hva + offset, not hva + offset*8. ;-)

Fix it.

Scores

CVSS	Score	Vector	Source
3.1	8.8 High	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H	Linux

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	f6927b41d57390c597a126063e2e518911976878 to before 4307e05e568782fc92eff651b09ee5dee88a058dAffected f6927b41d57390c597a126063e2e518911976878 to before 0496acc42fb51eee040b5170cec05cec41385540Affected
LinuxLinux	6.19Affected before 6.19Not affected 6.19.11 through 6.19.*Not affected 7.0 and laterNot affected

References

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