fib_rebalance · ipv4: avoid divide by zero
Affects MicrosoftSource GCVE Database
Not known to be exploited · fixed in d5520e815c4b1427104ce1428ee23821f2aa824d : update Microsoft when convenient.
Data as of 29 Oct 2026, 11:49 UTC
Rated by Threat Radar · CVSS not yet scored by NVD
Thin evidence
One scorer or none- Patch
- Available – fixed in d5520e815c4b1427104ce1428ee23821f2aa824d, 5046d2880fec7d49ebed2fd2866747ee1d06ad71, 5dac5c7ba8f5f3fb4bf29f2a2c3cb552f5b83c8f
Exploitation evidence
Disclosed: evidence found.
CVE published 28 Oct 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 Linux to d5520e815c4b1427104ce1428ee23821f2aa824d, 5046d2880fec7d49ebed2fd2866747ee1d06ad71 or 5dac5c7ba8f5f3fb4bf29f2a2c3cb552f5b83c8f.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| 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– |
Description
A vulnerability identified as CVE-2026-99121 affects Microsoft software version 3.0, involving a divide by zero issue in the IPv4 fib_rebalance component. The vulnerability has been published but lacks detailed technical or impact information and no CVSS score is available.