CVE-2026-98716: falha em Linux
KVM: SVM: Use the active VMCB's MSR bitmap when checking if MSR is intercepted
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3Vexday Risk Score
Sem sinal de exploração. Nenhum artefato público de exploração conhecido até agora.
ssvc Trackepss 0.2%
probabilidade de exploração
0.2%top 94% das CVEs
exploração observada
nãonenhuma fonte reporta
In the Linux kernel, the following vulnerability has been resolved:
KVM: SVM: Use the active VMCB's MSR bitmap when checking if MSR is intercepted
Use the MSR permission bitmap of the active VMCB instead of assuming that
KVM is always using vmcb02's bitmap when L2 is active, as KVM uses msrpm02
if and only if L1 wants to intercept MSR accesses, i.e. if and only if KVM
needs to merge msprm01 with msrpm12.
Don't bother tracking the virtual address of the bitmap that's being used,
as __va() is cheap on x86, and caching the virtual address would introduce
yet another source of potentially stale information.
Produtos afetados
Linux · LinuxCVEs relacionadas — Linux
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Referências
https://git.kernel.org/stable/c/318ef696fa3c712e46bb62a1a828c3cd62f390c3https://git.kernel.org/stable/c/55865b3ae03705aa39198783b9cb1f8b96eb44e4https://git.kernel.org/stable/c/74836ae4785b9754bb36d0b18fcc1dec4e5e98d2https://git.kernel.org/stable/c/84da7a0e92207444d9cbfe69965e17db29008f27https://git.kernel.org/stable/c/9e06bbb9ade7cdf28d4a3b5b14e5812881c8df85