CVE-2026-46027VulnerabilityPublished 2 May 2026Updated 9 Jun 2026

smc_clc_wait_msg · net/smc: avoid early lgr access

Affects MicrosoftSource GCVE Database

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Authoritative record:CVE-2026-46027· High 7.5

Not known to be exploited · CVSS 7.5 High · fixed in f0858e1d5624bb120b198f2a8528f97a9b0ae069 : patch Microsoft soon.

Data as of 29 Oct 2026, 19:04 UTC

CVSS 3.1 base score

7.5High

How severe the flaw is on the 0–10 CVSS scale.

EPSS: 0.5% chance of exploitation in 30 days – higher than 42% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in f0858e1d5624bb120b198f2a8528f97a9b0ae069, ea0b5d0fe96356dce38f98375a57c52a04e13712, 22546729b96fc873b23065dc49e3d73c45cfb874 +5

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector: Network
Attack Complexity: Low
Privileges Required: None
User Interaction: None
Scope: Unchanged
Confidentiality: None
Integrity: None
Availability: High

Bold values are the worst case: easiest to exploit or largest impact.

Attack Vector: Network: The vulnerable component is bound to the network stack and the set of possible attackers extends beyond the other options listed, up to and including the entire Internet. Such a vulnerability is often termed 'remotely exploitable' and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers).
Attack Complexity: Low: Specialized access conditions or extenuating circumstances do not exist. An attacker can expect repeatable success against the vulnerable component.
Privileges Required: None: The attacker is unauthorized prior to attack, and therefore does not require any access to settings or files to carry out an attack.
User Interaction: None: The vulnerable system can be exploited without any interaction from any user.
Scope: Unchanged: An exploited vulnerability can only affect resources managed by the same security authority. In this case, the vulnerable component and the impacted component are either the same, or both are managed by the same security authority.
Confidentiality: None: There is no loss of confidentiality within the impacted component.
Integrity: None: There is no loss of integrity within the impacted component.
Availability: High: There is total loss of availability, resulting in the attacker being able to fully deny access to resources in the impacted component; this loss is either sustained (while the attacker continues to deliver the attack) or persistent (the condition persists even after the attack has completed). Alternatively, the attacker has the ability to deny some availability, but the loss of availability presents a direct, serious consequence to the impacted component (e.g., the attacker cannot disrupt existing connections, but can prevent new connections; the attacker can repeatedly exploit a vulnerability that, in each instance of a successful attack, leaks a only small amount of memory, but after repeated exploitation causes a service to become completely unavailable).

Definitions: FIRST CVSS v3.1 specification.

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 29 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 ≥ 0cfdd8f92cac01afbb12e4500514036a2b78756b, < f0858e1d5624bb120b198f2a8528f97a9b0ae069	Fixed in f0858e1d5624bb120b198f2a8528f97a9b0ae069
LinuxLinux	Affected ≥ 0cfdd8f92cac01afbb12e4500514036a2b78756b, < ea0b5d0fe96356dce38f98375a57c52a04e13712	Fixed in ea0b5d0fe96356dce38f98375a57c52a04e13712
LinuxLinux	Affected ≥ 0cfdd8f92cac01afbb12e4500514036a2b78756b, < 22546729b96fc873b23065dc49e3d73c45cfb874	Fixed in 22546729b96fc873b23065dc49e3d73c45cfb874
LinuxLinux	Affected ≥ 0cfdd8f92cac01afbb12e4500514036a2b78756b, < 6180a296ca65b08a81914805cbc0f78da5f10a1f	Fixed in 6180a296ca65b08a81914805cbc0f78da5f10a1f
LinuxLinux	Affected ≥ 0cfdd8f92cac01afbb12e4500514036a2b78756b, < 257cdf0c5ced9c0fba8aba501d94b0a5fcef2086	Fixed in 257cdf0c5ced9c0fba8aba501d94b0a5fcef2086
LinuxLinux	Affected ≥ 0cfdd8f92cac01afbb12e4500514036a2b78756b, < 83bcf9228b0501694fb2589ed1d142855a2887f2	Fixed in 83bcf9228b0501694fb2589ed1d142855a2887f2

AI-suggested

No specific mitigation recommendations can be made based on the available information.

Description

CVE-2026-46027 is a vulnerability related to the net/smc component in Microsoft products, specifically involving early lgr access in the smc_clc_wait_msg function. The provided information does not include technical details about the nature of the vulnerability or its exploitation. There is no CVSS score or detailed impact description available. No known exploits in the wild have been reported.

Impact

Due to the lack of detailed information, the exact impact of this vulnerability cannot be determined from the provided data. No known exploits have been reported, and no CVSS score is available to assess severity.

Summary

This vulnerability concerns improper handling of early lgr access in the smc_clc_wait_msg function within Microsoft and Azure Linux 3.0 environments. The description and technical details are minimal, with no CVSS score or exploitation information. The Microsoft Security Response Center is the publisher, but no specific patch or mitigation guidance is included in the data.

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What to do

Affected software

Description

AI analysisMachine-generated, updated 28 May 2026, 21:12 UTC

Technical details

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