CVE-2026-43133
KVM: nSVM: Always use vmcb01 in VMLOAD/VMSAVE emulation
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
In the Linux kernel, the following vulnerability has been resolved: KVM: nSVM: Always use vmcb01 in VMLOAD/VMSAVE emulation Commit cc3ed80ae69f ("KVM: nSVM: always use vmcb01 to for vmsave/vmload of guest state") made KVM always use vmcb01 for the fields controlled by VMSAVE/VMLOAD, but it missed updating the VMLOAD/VMSAVE emulation code to always use vmcb01. As a result, if VMSAVE/VMLOAD is executed by an L2 guest and is not intercepted by L1, KVM will mistakenly use vmcb02. Always use vmcb01 instead of the current VMCB.
| Vendor | linux |
| Product | linux |
| Ecosystems | |
| Industries | Technology |
| Published | May 6, 2026 |
Stay Ahead of the Next One
Get instant alerts for linux linux
Be the first to know when new unknown vulnerabilities affecting linux linux are published — delivered to Slack, Telegram or Discord.
Get Free Alerts →
Free · No credit card · 60 sec setup
Affected Versions
Linux / Linux
cc3ed80ae69f454c3d904af9f65394a540099723 < 10063e1251c1485034a018236080792ad083dcc5 cc3ed80ae69f454c3d904af9f65394a540099723 < c3b7015000988ba35ecd5648f4b2283960f00543 cc3ed80ae69f454c3d904af9f65394a540099723 < 3880e331b0b31d0d5d3702b124f6c93539cd478a cc3ed80ae69f454c3d904af9f65394a540099723 < fce2fd4a2ca05670a91015aacccf96a1c26268fd cc3ed80ae69f454c3d904af9f65394a540099723 < d464cf1ed900d47c85393d40b00017b6adfc2e6c cc3ed80ae69f454c3d904af9f65394a540099723 < 0004ecb798b30e90d7ebfe74efae2d9423315a64 cc3ed80ae69f454c3d904af9f65394a540099723 < 127ccae2c185f62e6ecb4bf24f9cb307e9b9c619
Linux / Linux
5.13
References
git.kernel.org: https://git.kernel.org/stable/c/10063e1251c1485034a018236080792ad083dcc5 git.kernel.org: https://git.kernel.org/stable/c/c3b7015000988ba35ecd5648f4b2283960f00543 git.kernel.org: https://git.kernel.org/stable/c/3880e331b0b31d0d5d3702b124f6c93539cd478a git.kernel.org: https://git.kernel.org/stable/c/fce2fd4a2ca05670a91015aacccf96a1c26268fd git.kernel.org: https://git.kernel.org/stable/c/d464cf1ed900d47c85393d40b00017b6adfc2e6c git.kernel.org: https://git.kernel.org/stable/c/0004ecb798b30e90d7ebfe74efae2d9423315a64 git.kernel.org: https://git.kernel.org/stable/c/127ccae2c185f62e6ecb4bf24f9cb307e9b9c619