CVE-2026-46059VulnerabilityPublished 28 May 2026Updated 24 Sep 2026

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

Affects MicrosoftSource GCVE Database

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Authoritative record:CVE-2026-46059

Not known to be exploited · fixed in f9197a9dd1408e203147326139122f9c5312ce9c : update Microsoft when convenient.

Data as of 30 Oct 2026, 11:52 UTC

Severity

Medium

Rated by Threat Radar · No CVSS score from NVD or the CNA

Thin evidence

One scorer or none

EPSS: 0.1% chance of exploitation in 30 days – higher than 1% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in f9197a9dd1408e203147326139122f9c5312ce9c, b1a45e8a59bcf1f1ec0da6d4e42190b4211c67fc, 98717fb482fa269db491f7c84aec777d3aeb2cd1 +3

Exploitation evidence

Disclosed: evidence found.
CVE published 27 May 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 30 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponized: A Metasploit exploit module or Exploit-DB entry exists (Metasploit scanner modules do not count), or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

microsoft-security-response-ce

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ cc440cdad5b7a4c1de12dace725209eb3e0cf663, < f9197a9dd1408e203147326139122f9c5312ce9c	Fixed in f9197a9dd1408e203147326139122f9c5312ce9c
LinuxLinux	Affected ≥ cc440cdad5b7a4c1de12dace725209eb3e0cf663, < b1a45e8a59bcf1f1ec0da6d4e42190b4211c67fc	Fixed in b1a45e8a59bcf1f1ec0da6d4e42190b4211c67fc
LinuxLinux	Affected ≥ cc440cdad5b7a4c1de12dace725209eb3e0cf663, < 98717fb482fa269db491f7c84aec777d3aeb2cd1	Fixed in 98717fb482fa269db491f7c84aec777d3aeb2cd1
LinuxLinux	Affected ≥ cc440cdad5b7a4c1de12dace725209eb3e0cf663, < 3428ed1529a1af4cce5aff6c5bd2fcc39ad726bb	Fixed in 3428ed1529a1af4cce5aff6c5bd2fcc39ad726bb
LinuxLinux	Affected ≥ cc440cdad5b7a4c1de12dace725209eb3e0cf663, < 69fe1411a5ce678b4da6489b5d2282b4e1d13acf	Fixed in 69fe1411a5ce678b4da6489b5d2282b4e1d13acf
LinuxLinux	Affected ≥ cc440cdad5b7a4c1de12dace725209eb3e0cf663, < 8d397582f6b5e9fbcf09781c7c934b4910e94a50	Fixed in 8d397582f6b5e9fbcf09781c7c934b4910e94a50

AI-suggested

No specific mitigation or workaround information is available from the provided data.

Description

CVE-2026-46059 is a vulnerability related to KVM nested virtualization handling in Microsoft products, specifically involving the use of NextRIP as vmcb02's NextRIP after the first L2 VMRUN. The provided information does not include technical details beyond this brief mention, nor does it specify exploitation methods or impact scenarios. There are no known exploits in the wild at this time.

Impact

The impact of this vulnerability is not explicitly described in the available information. There are no known exploits in the wild, and no details on potential consequences such as privilege escalation, denial of service, or information disclosure are provided.

Summary

This vulnerability concerns the KVM nested virtualization implementation in Microsoft products, where the NextRIP value is always used as vmcb02's NextRIP after the first L2 VMRUN instruction. The description and technical details are minimal and do not elaborate on the potential impact or exploitation vectors. The affected products include Microsoft Azure Linux 3.0 and related versions.

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 28 May 2026, 21:14 UTC

Technical details

References

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