Microsoft · net: bridge: mcast: don't truncate the port group walk on teardown
Affects MicrosoftSource GCVE Database
Not known to be exploited · fixed in b45e8c24608c992d1e2cea047eb5bcbfa537f86b : patch Microsoft soon.
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 b45e8c24608c992d1e2cea047eb5bcbfa537f86b, 8243d587a081e790ad96e80d48eef44d9f7ef005, 5a3f7a683aee56e1f15c9d53041f3236767eaae7
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 b45e8c24608c992d1e2cea047eb5bcbfa537f86b, 8243d587a081e790ad96e80d48eef44d9f7ef005 or 5a3f7a683aee56e1f15c9d53041f3236767eaae7.
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-2026-99117 is a vulnerability related to the network bridge multicast handling in Microsoft software version 3.0. The issue involves improper truncation of the port group walk during teardown, which may affect network operations. No detailed impact or exploitation information is provided.