Microsoft · xen/netfront: don't leak the skb when xennet_fill_frags() fails
Affects MicrosoftSource GCVE Database
Not known to be exploited · fixed in 99011a11c97340ef7290df7dc199305c73fab2f2 : update Microsoft when convenient.
Data as of 7 Nov 2026, 12:32 UTC
Rated by Threat Radar · CVSS not yet scored by NVD
Thin evidence
One scorer or none- Patch
- Available – fixed in 99011a11c97340ef7290df7dc199305c73fab2f2, 086944c1c2cbb683543bc3ff08637847b03c8009, 5051df031144753d3e18862514969146b601d089 +9
Exploitation evidence
Disclosed: evidence found.
CVE published 23 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 7 Nov 2026.
What to do
Upgrade to a fixed release listed under Affected software.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| LinuxLinux | Affected
| Fixed in
|
| LinuxLinux | Affected
| Fixed in– |
Description
A vulnerability identified as CVE-2026-99057 affects Microsoft products versions 3.0 and 4.0. The issue relates to the xen/netfront component where the skb (socket buffer) is leaked when the function xennet_fill_frags() fails. No CVSS score or detailed impact information is provided.