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CVE-2026-99167VulnerabilityPublished

__tcf_action_put() · net/sched: fix use-after-free

Affects MicrosoftSource GCVE Database

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Authoritative record:CVE-2026-99167· High

Not known to be exploited · fixed in 2465d27ef90de9105c2bffb6c35f8ce08918e642 : patch Microsoft soon.

Data as of 29 Oct 2026, 11:36 UTC

Severity
High

Rated by Threat Radar · CVSS not yet scored by NVD

Thin evidence

One scorer or none
Patch
Available – fixed in 2465d27ef90de9105c2bffb6c35f8ce08918e642, 7b16eb911091aae237a8673da94e4dfb9cd21d54, 2e012e431aa271ef3c84206f48854f539c03bff0

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 28 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 29 Oct 2026.

What to do

Upgrade Linux to 2465d27ef90de9105c2bffb6c35f8ce08918e642, 7b16eb911091aae237a8673da94e4dfb9cd21d54 or 2e012e431aa271ef3c84206f48854f539c03bff0.

Affected software

ProductAffectedFixed in
LinuxLinuxAffected
  • ≥ 16af6067392c40e454e49eec834843ab03643d96, < 2465d27ef90de9105c2bffb6c35f8ce08918e642
Fixed in
  • 2465d27ef90de9105c2bffb6c35f8ce08918e642
LinuxLinuxAffected
  • ≥ 16af6067392c40e454e49eec834843ab03643d96, < 7b16eb911091aae237a8673da94e4dfb9cd21d54
Fixed in
  • 7b16eb911091aae237a8673da94e4dfb9cd21d54
LinuxLinuxAffected
  • ≥ 16af6067392c40e454e49eec834843ab03643d96, < 2e012e431aa271ef3c84206f48854f539c03bff0
Fixed in
  • 2e012e431aa271ef3c84206f48854f539c03bff0
LinuxLinuxAffected
  • =4.19
Fixed in–

Description

A use-after-free vulnerability exists in the __tcf_action_put() function in Microsoft software, identified as CVE-2026-99167. The vulnerability affects version 3.0 of the product. No CVSS score or detailed impact information is provided.

References

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