CVE-2026-46059

KVM: nSVM: Always use NextRIP as vmcb02's NextRIP after first L2 VMRUN

MEDIUM
5.5
CVSS Score
Published: May 27, 2026 at 12:57 PM UTC
Updated: October 21, 2026 at 01:19 PM UTC
1 product affected across 1 vendorLinux Kernel

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Severity
MEDIUM5.5
Exploit prediction
EPSS 0.1%

Description

In the Linux kernel, the following vulnerability has been resolved: KVM: nSVM: Always use NextRIP as vmcb02's NextRIP after first L2 VMRUN For guests with NRIPS disabled, L1 does not provide NextRIP when running an L2 with an injected soft interrupt, instead it advances the current RIP before running it. KVM uses the current RIP as the NextRIP in vmcb02 to emulate a CPU without NRIPS. However, after L2 runs the first time, NextRIP will be updated by the CPU and/or KVM, and the current RIP is no longer the correct value to use in vmcb02. Hence, after save/restore, use the current RIP if and only if a nested run is pending, otherwise use NextRIP. Give soft_int_next_rip the same treatment, as it's the same logic, just for a narrower use case. [sean: give soft_int_next_rip the same treatment]

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

5.8 ≤ v < 6.18.276.19 ≤ v < 7.0.45.8cc440cdad5b7a4c1de12dace725209eb3e0cf663
Vendor states this is fixed in 3428ed1529a1af4cce5aff6c5bd2fcc39ad726bb (fixed)
Vendor states this is fixed in 69fe1411a5ce678b4da6489b5d2282b4e1d13acf (fixed)
Vendor states this is fixed in 8d397582f6b5e9fbcf09781c7c934b4910e94a50 (fixed)
Vendor states this is fixed in 5.8 (unaffected)
Vendor states this is fixed in 6.12.114 (unaffected)
Vendor states this is fixed in 6.18.27 (unaffected)
Vendor states this is fixed in 6.6.160 (unaffected)
Vendor states this is fixed in 7.0.4 (unaffected)
Vendor states this is fixed in 7.1 (unaffected)

CVSS

Attack Vector
LOCAL
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
NVD-CWE-noinfo

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