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CVE-2026-98643VulnerabilityPublished Updated

sock_ops · bpf: Fix out-of-bounds read of rtt_min

Affects MicrosoftSource GCVE Database

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Authoritative record:CVE-2026-98643· High

Not known to be exploited · fixed in fd6bf2721933d8c90bc4ce57f3e204c9295e7e3f : patch Microsoft soon.

Data as of 2 Nov 2026, 08:46 UTC

Severity
High

Rated by Threat Radar · CVSS not yet scored by NVD

Patch
Available – fixed in fd6bf2721933d8c90bc4ce57f3e204c9295e7e3f, fc9d0e6e9d86fbefe7b8fe6ee49f4cf102add79d, cba54d142c43ec96d8c4d566f66439e8c0afded7 +5

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 1 Nov 2026.

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

ProductAffectedFixed in
LinuxLinuxAffected
  • ≥ 44f0e43037d3a17b043843ba67610ac7c7e37db6, < fd6bf2721933d8c90bc4ce57f3e204c9295e7e3f
Fixed in
  • fd6bf2721933d8c90bc4ce57f3e204c9295e7e3f
LinuxLinuxAffected
  • ≥ 44f0e43037d3a17b043843ba67610ac7c7e37db6, < fc9d0e6e9d86fbefe7b8fe6ee49f4cf102add79d
Fixed in
  • fc9d0e6e9d86fbefe7b8fe6ee49f4cf102add79d
LinuxLinuxAffected
  • ≥ 44f0e43037d3a17b043843ba67610ac7c7e37db6, < cba54d142c43ec96d8c4d566f66439e8c0afded7
Fixed in
  • cba54d142c43ec96d8c4d566f66439e8c0afded7
LinuxLinuxAffected
  • ≥ 44f0e43037d3a17b043843ba67610ac7c7e37db6, < a8a9becbac93a9f54f4d565f1f3005eb08a7912f
Fixed in
  • a8a9becbac93a9f54f4d565f1f3005eb08a7912f
LinuxLinuxAffected
  • ≥ 44f0e43037d3a17b043843ba67610ac7c7e37db6, < 6785313d4fac96afb21ef193610c1fa88b1a9e64
Fixed in
  • 6785313d4fac96afb21ef193610c1fa88b1a9e64
LinuxLinuxAffected
  • ≥ 44f0e43037d3a17b043843ba67610ac7c7e37db6, < 75f8cf22463d82bb1fb0239a3d485fc8f4c8ef03
Fixed in
  • 75f8cf22463d82bb1fb0239a3d485fc8f4c8ef03

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

Description

CVE-2026-98643 is a vulnerability in Microsoft software involving an out-of-bounds read of the rtt_min variable in the sock_ops component of the BPF subsystem. The flaw could potentially lead to memory access issues. The affected versions are Microsoft versions 3.0 and 4.0. No CVSS score or detailed impact information is provided, and no known exploits are reported in the wild.

References

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