Microsoft · s390/ctcm: Prevent XID null dereference
Affects MicrosoftSource GCVE Database
Not known to be exploited · fixed in b264d8422779d69febce914efc47a92a85cc382c : 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 b264d8422779d69febce914efc47a92a85cc382c, 34fa3607b7604b3052b19cec8b0ad644818cdd2a, 8a2f7a4ad1d81612fa65bfa4d392ba1bb2f5eeab
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 b264d8422779d69febce914efc47a92a85cc382c, 34fa3607b7604b3052b19cec8b0ad644818cdd2a or 8a2f7a4ad1d81612fa65bfa4d392ba1bb2f5eeab.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| LinuxLinux | Affected
| Fixed in
|
| LinuxLinux | Affected
| Fixed in
|
| LinuxLinux | Affected
| Fixed in
|
| LinuxLinux | Affected
| Fixed in– |
Description
CVE-2026-99126 is a vulnerability identified in Microsoft software version 3.0 related to the s390/ctcm component, specifically addressing a null pointer dereference issue involving XID. The advisory references Microsoft's support lifecycle but provides no detailed technical or impact information.