Microsoft · mptcp: pm: ADD_ADDR rtx: fix potential data-race
Affects MicrosoftSource GCVE Database
Not known to be exploited · CVSS 9.8 Critical · fixed in d9b272a85fe6b8f993e37915311e4038c814a533 : patch Microsoft as a priority.
Data as of 30 Oct 2026, 06:59 UTC
- EPSS
- 0.4% chance of exploitation in 30 days – higher than 41% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in d9b272a85fe6b8f993e37915311e4038c814a533, cc3c0399361efaaf7ae64262eb3f70829b1189c6, b35605e1f1e877038c8c9d499babbc891cdd234f +5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HExploitation evidence
Disclosed: evidence found.
CVE published 28 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.
What to do
Upgrade to a fixed release listed under Affected software.
Affected software
| Product | 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
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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Description
This vulnerability, identified as CVE-2026-46137, relates to a potential data race in the mptcp (Multipath TCP) implementation specifically in the ADD_ADDR retransmission logic. It affects Microsoft product version 3.0. No CVSS score or detailed impact information is provided.