Function Call with Incorrectly Specified Arguments The advisory has been revoked - it doesn't affect any version of package kernel6.18-libbpf-debuginfo (opens in a new tab)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-AMZN2023-KERNEL618LIBBPFDEBUGINFO-16740510
- published18 May 2026
- disclosed6 May 2026
Introduced: 6 May 2026
CVE-2026-43133 (opens in a new tab)Amendment
The Amazon-Linux security team deemed this advisory irrelevant for Amazon-Linux:2023.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel6.18-libbpf-debuginfo package and not the kernel6.18-libbpf-debuginfo package as distributed by Amazon-Linux.
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.
References
- http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-43133
- https://git.kernel.org/stable/c/0004ecb798b30e90d7ebfe74efae2d9423315a64
- https://git.kernel.org/stable/c/10063e1251c1485034a018236080792ad083dcc5
- https://git.kernel.org/stable/c/127ccae2c185f62e6ecb4bf24f9cb307e9b9c619
- https://git.kernel.org/stable/c/3880e331b0b31d0d5d3702b124f6c93539cd478a
- https://git.kernel.org/stable/c/c3b7015000988ba35ecd5648f4b2283960f00543
- https://git.kernel.org/stable/c/d464cf1ed900d47c85393d40b00017b6adfc2e6c
- https://git.kernel.org/stable/c/fce2fd4a2ca05670a91015aacccf96a1c26268fd
- https://access.redhat.com/security/cve/CVE-2026-43133
- https://bugzilla.redhat.com/show_bug.cgi?id=2467065
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-43133.json