CVE-2026-89918

In the Linux kernel, the following vulnerability has been resolved: KVM: arm64: Correctly handle end of VA space TLBI invalidation Our TLB invalidation by VA code is based on comparing two ranges, one defined by the TLB, and one defined by the TLBI instruction. Each range is defined by a start and a size. However, the way the comparison is done doesn't account for address rollover, as it compares an address with (base + size). This works nicely until this expression represent the last page/block in the TTBR1 VA space, as the result is a big fat 0. And a failed TLB invalidation. Rewrite the comparison in a way that is immune to the address rollover (making the end address inclusive instead of exclusive), and move this into a common helper that is used by both VA and IPA invalidations, as suggested by Hyunwoo Kim (although the IPA version didn't suffer from this particular problem, obviously).

CVSS

No CVSS.

References

Link	Resource
https://git.kernel.org/stable/c/34af2c3e31f91a739dc175459fdbd99ed952b457
https://git.kernel.org/stable/c/c624731ca6fe59ad8909ce4108301aa7560a91d6
https://git.kernel.org/stable/c/ce447651a52ec077694172af10c4fffb11f56c43

Configurations

No configuration.

History

No history.

Information

Published : 2026-09-16 11:17

Updated : 2026-09-16 11:17

NVD link : CVE-2026-89918

Mitre link : CVE-2026-89918

CVE.ORG link : CVE-2026-89918

JSON object : View

Products Affected

No product.

CWE

No CWE.

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