Microsoft · vsock/vmci: validate packet source for connected sockets
Affects MicrosoftSource GCVE Database
Not known to be exploited · fixed in c027f8b429dbb2157fc1b503df196e272d947c89 : update Microsoft when convenient.
Data as of 29 Oct 2026, 11:49 UTC
Rated by Threat Radar · CVSS not yet scored by NVD
Thin evidence
One scorer or none- Patch
- Available – fixed in c027f8b429dbb2157fc1b503df196e272d947c89, ad9a7da3fa39c2d616ec0dd3cf6e30531d032fe7, 90c423b62ec9be08177f74b07a47937ca8d2035b
Exploitation evidence
Disclosed: evidence found.
CVE published 28 Oct 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.
What to do
Upgrade Linux to c027f8b429dbb2157fc1b503df196e272d947c89, ad9a7da3fa39c2d616ec0dd3cf6e30531d032fe7 or 90c423b62ec9be08177f74b07a47937ca8d2035b.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in– |
Description
CVE-2026-99122 is a vulnerability in Microsoft related to vsock/vmci where packet sources for connected sockets are not properly validated. The advisory does not provide detailed technical information or impact specifics. No CVSS score or exploit details are available.