CVE-2026-46076 KVM: nSVM: Raise #UD if unhandled VMMCALL isn't intercepted by L1

🗓️ 27 May 2026 12:58:09Reported by GoogleType

osv🔗 osv.dev👁 3 Views

KVM nSVM raises #UD for unhandled VMMCALL when L2 is active, L1 does not intercept, and the hypercall is not a Hyper-V one.

Reporter	Title	Published	Views	Family All 125
ATTACKERKB	CVE-2026-46076	27 May 202612:58	–	attackerkb
Tenable Nessus	Amazon Linux 2023 : bpftool6.12, kernel6.12, kernel6.12-devel (ALAS2023-2026-1753)	27 May 202600:00	–	nessus
Tenable Nessus	Amazon Linux 2023 : bpftool6.18, kernel6.18, kernel6.18-devel (ALAS2023-2026-1754)	27 May 202600:00	–	nessus
Tenable Nessus	Oracle Linux 10 / 9 : Unbreakable Enterprise kernel (ELSA-2026-50372)	6 Jul 202600:00	–	nessus
Tenable Nessus	SUSE SLED15: cluster-md-kmp-default / dlm-kmp-default / gfs2-kmp-default / etc (SUSE-SU-2026:2800-1)	9 Jul 202600:00	–	nessus
Tenable Nessus	Ubuntu 26.04 LTS : Linux kernel vulnerabilities (USN-8488-1)	3 Jul 202600:00	–	nessus
Tenable Nessus	Ubuntu 26.04 LTS : Linux kernel (OEM) vulnerabilities (USN-8489-1)	3 Jul 202600:00	–	nessus
Tenable Nessus	Ubuntu 26.04 LTS : Linux kernel (NVIDIA) vulnerabilities (USN-8507-1)	7 Jul 202600:00	–	nessus
Tenable Nessus	Linux Distros Unpatched Vulnerability : CVE-2026-46076	27 May 202600:00	–	nessus
Amazon	Important: kernel6.12	26 May 202600:00	–	amazon

Source	Link
git	www.git.kernel.org/stable/c/009c0f726abeaa67aad1d96b883bdce01d405ce2
git	www.git.kernel.org/stable/c/5fb4a5f361565f5b629d8a8fe5288ce8463c5727
git	www.git.kernel.org/stable/c/924d721fae95687acedbaf624a094ed0e8b67104
git	www.git.kernel.org/stable/c/c36991c6f8d2ab56ee67aff04e3c357f45cfc76c
github	www.github.com/CVEProject/cvelistV5/tree/main/cves/2026/46xxx/CVE-2026-46076.json
nvd	www.nvd.nist.gov/vuln/detail/CVE-2026-46076
git	www.git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git

09 Jul 2026 18:30Current

6.6Medium risk

Vulners AI Score6.6

CVSS 3.17.9

EPSS0.00121