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CVE-2026-43107VulnerabilityPublished Updated

aevent size calculation · xfrm: account XFRMA_IF_ID

Affects MicrosoftSource GCVE Database

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Authoritative record:CVE-2026-43107· High

Not known to be exploited · fixed in f8f3bb89ab677db15f9f5250c77af728f9afe995 : patch Microsoft soon.

Data as of 10 Nov 2026, 23:24 UTC

Severity
High

Rated by Threat Radar · No CVSS score from NVD or the CNA

Thin evidence

One scorer or none
EPSS
0.1% chance of exploitation in 30 days – higher than 4% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in f8f3bb89ab677db15f9f5250c77af728f9afe995, e62e322ea20be78e346e4b49f9a6b9f03313af4c, b7dbdc34d22f743abb2c460dfae0d69cd8a45e69 +3

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 6 May 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 10 Nov 2026.

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

ProductAffectedFixed in
LinuxLinuxAffected
  • ≥ 7e6526404adedf079279aa7aa11722deaca8fe2e, < f8f3bb89ab677db15f9f5250c77af728f9afe995
Fixed in
  • f8f3bb89ab677db15f9f5250c77af728f9afe995
LinuxLinuxAffected
  • ≥ 7e6526404adedf079279aa7aa11722deaca8fe2e, < e62e322ea20be78e346e4b49f9a6b9f03313af4c
Fixed in
  • e62e322ea20be78e346e4b49f9a6b9f03313af4c
LinuxLinuxAffected
  • ≥ 7e6526404adedf079279aa7aa11722deaca8fe2e, < b7dbdc34d22f743abb2c460dfae0d69cd8a45e69
Fixed in
  • b7dbdc34d22f743abb2c460dfae0d69cd8a45e69
LinuxLinuxAffected
  • ≥ 7e6526404adedf079279aa7aa11722deaca8fe2e, < 7081d46d32312f1a31f0e0e99c6835a394037599
Fixed in
  • 7081d46d32312f1a31f0e0e99c6835a394037599
LinuxLinuxAffected
  • ≥ 7e6526404adedf079279aa7aa11722deaca8fe2e, < 58e5735d1a5373652f405a0c16e54ac04aaab0ad
Fixed in
  • 58e5735d1a5373652f405a0c16e54ac04aaab0ad
LinuxLinuxAffected
  • ≥ 7e6526404adedf079279aa7aa11722deaca8fe2e, < 2c41283d94af943a05f7f2cc1a01f0c872f3cf43
Fixed in
  • 2c41283d94af943a05f7f2cc1a01f0c872f3cf43

Description

CVE-2026-43107 is a vulnerability related to the xfrm subsystem involving the account XFRMA_IF_ID in an event size calculation. The available information is minimal and does not provide technical details about the nature of the vulnerability or its impact. The affected product is Microsoft software version 3.0.

References

Community reviews

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