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CVE-2026-31568VulnerabilityPublished Updated

Microsoft · s390/mm: Add missing secure storage access fixups for donated memory

Affects MicrosoftSource GCVE Database

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Authoritative record:CVE-2026-31568· Medium

Not known to be exploited · fixed in b36b0e804aee5f20c6798dbeaeaa7cfdb7c6cf88 : update Microsoft when convenient.

Data as of 30 Oct 2026, 06:59 UTC

Severity
Medium

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

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 b36b0e804aee5f20c6798dbeaeaa7cfdb7c6cf88, b00be77302d7ec4ad0367bb236494fce7172b730, 74ccc099f1baa9236b8fb600406457a0870c83a9 +2

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 24 Apr 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 to a fixed release listed under Affected software.

Affected software

ProductAffectedFixed in
LinuxLinuxAffected
  • ≥ 084ea4d611a3d00ee3930400b262240e10895900, < b36b0e804aee5f20c6798dbeaeaa7cfdb7c6cf88
Fixed in
  • b36b0e804aee5f20c6798dbeaeaa7cfdb7c6cf88
LinuxLinuxAffected
  • ≥ 084ea4d611a3d00ee3930400b262240e10895900, < b00be77302d7ec4ad0367bb236494fce7172b730
Fixed in
  • b00be77302d7ec4ad0367bb236494fce7172b730
LinuxLinuxAffected
  • ≥ 084ea4d611a3d00ee3930400b262240e10895900, < 74ccc099f1baa9236b8fb600406457a0870c83a9
Fixed in
  • 74ccc099f1baa9236b8fb600406457a0870c83a9
LinuxLinuxAffected
  • ≥ 084ea4d611a3d00ee3930400b262240e10895900, < 43ac2d18db1131df0a89993f709131ebfc29f3bd
Fixed in
  • 43ac2d18db1131df0a89993f709131ebfc29f3bd
LinuxLinuxAffected
  • ≥ 084ea4d611a3d00ee3930400b262240e10895900, < 1eb35c54cd81cf874ce7d69e3dbfb162f211b8bd
Fixed in
  • 1eb35c54cd81cf874ce7d69e3dbfb162f211b8bd
LinuxLinuxAffected
  • =5.7
Fixed in–

Description

CVE-2026-31568 is a vulnerability identified by the Microsoft Security Response Center related to missing secure storage access fixups for donated memory in the s390/mm component. The affected versions are specifically version 2.0 and 3.0 of the product. No CVSS score or detailed technical exploitation information is provided. There are no known exploits in the wild at this time.

References

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