CVE-2026-31553: KVM: arm64: Fix the descriptor address in __kvm_at_swap_desc()
In the Linux kernel, the following vulnerability has been resolved:
KVM: arm64: Fix the descriptor address in kvmatswapdesc()
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 + offset8. ;-)
Fix it.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
debian/linuxto a version that resolves this vulnerability.Fixed in 6.19.11-1 - Upgrade
Upgrade
debian/linuxto a version that resolves this vulnerability.Fixed in 6.1.176-1Fixed in 6.1.190-1Fixed in 6.12.107-1Fixed in 6.12.116-1Fixed in 7.2.15-1Fixed in 7.3.4-1
Event History
Frequently Asked Questions
What is the severity of CVE-2026-31553?
CVE-2026-31553 has a severity rating of high with a score of 8.8.
What vulnerabilities does CVE-2026-31553 address?
CVE-2026-31553 addresses a flaw in the KVM: arm64 module regarding incorrect virtual address handling in the Linux kernel.
How do I fix CVE-2026-31553?
To fix CVE-2026-31553, ensure that your Linux kernel version is updated to the latest patch that addresses this vulnerability.
What platforms are affected by CVE-2026-31553?
CVE-2026-31553 affects the Linux kernel specifically for KVM on arm64 architecture.
What impact could CVE-2026-31553 have if exploited?
Exploitation of CVE-2026-31553 could lead to unauthorized access and manipulation of memory in the affected system.