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CVE-2026-98561VulnerabilityPublished Updated

Microsoft · nfp: hold IPsec RX state under the XArray lock

Affects MicrosoftSource GCVE Database

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Authoritative record:CVE-2026-98561· High

Not known to be exploited · fixed in fe6c8ea8bfd5d1253bb0de682b1fcc2c4bb92488 : patch Microsoft soon.

Data as of 2 Nov 2026, 10:58 UTC

Severity
High

Rated by Threat Radar · CVSS not yet scored by NVD

EPSS
0.2% chance of exploitation in 30 days – higher than 10% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in fe6c8ea8bfd5d1253bb0de682b1fcc2c4bb92488, dd765023bb54f9650f8b9137906fb2c4a554dd1d, c1b1639fb138db52fcfbd1747e92f2454076c6d5 +2

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 18 Oct 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq 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 2 Nov 2026.

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

ProductAffectedFixed in
LinuxLinuxAffected
  • ≥ 57f273adbcd44172cbe0bd10b8b7408dd255699f, < fe6c8ea8bfd5d1253bb0de682b1fcc2c4bb92488
Fixed in
  • fe6c8ea8bfd5d1253bb0de682b1fcc2c4bb92488
LinuxLinuxAffected
  • ≥ 57f273adbcd44172cbe0bd10b8b7408dd255699f, < dd765023bb54f9650f8b9137906fb2c4a554dd1d
Fixed in
  • dd765023bb54f9650f8b9137906fb2c4a554dd1d
LinuxLinuxAffected
  • ≥ 57f273adbcd44172cbe0bd10b8b7408dd255699f, < c1b1639fb138db52fcfbd1747e92f2454076c6d5
Fixed in
  • c1b1639fb138db52fcfbd1747e92f2454076c6d5
LinuxLinuxAffected
  • ≥ 57f273adbcd44172cbe0bd10b8b7408dd255699f, < 8468d05aa08dc430b5675beadf6f6fb8943f170b
Fixed in
  • 8468d05aa08dc430b5675beadf6f6fb8943f170b
LinuxLinuxAffected
  • ≥ 57f273adbcd44172cbe0bd10b8b7408dd255699f, < 1a983a4e14c635c40354be110cd9a1a5c94e01e6
Fixed in
  • 1a983a4e14c635c40354be110cd9a1a5c94e01e6
LinuxLinuxAffected
  • =6.2
Fixed in–

Description

This vulnerability, identified as CVE-2026-98561, relates to the handling of IPsec RX state under the XArray lock in Microsoft software versions 3.0 and 4.0. No detailed technical information or impact description is provided. The advisory references Microsoft's support lifecycle for further information.

References

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