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CVE Record

CVE-2026-98638: KVM: arm64: Validate the SVE vector length in pkvm_vcpu_init_sve()

In the Linux kernel, the following vulnerability has been resolved: KVM: arm64: Validate the SVE vector length in pkvm_vcpu_init_sve() pkvm_vcpu_init_sve() clamps only the upper bound of the host-provided sve_max_vl, so an invalid vector length reaches sve_state_size_from_vl() and the WARN_ON() there, which is fatal at EL2. The existing !sve_state_size test rejects such a length, but only after the macro has run. Check sve_vl_valid() before deriving the state size. A valid length cannot yield a zero size, so the !sve_state_size test goes with it.

UnknownCVSS not scoredNot KEV-listedUpdated
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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

CNA and ADP enrichment extracted from CVE v5

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0CVSS vectors
3Timeline events
0ADP providers
4Source links

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Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinux5db1bef933427aa467ad89c7b695a84a6b4afe16, 5db1bef933427aa467ad89c7b695a84a6b4afe16, 5db1bef933427aa467ad89c7b695a84a6b4afe16unaffected
LinuxLinux6.16, 0, 6.18.55, 7.2.9, 7.3-rc5affected
Weakness

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