All vulnerabilities
CVE-2026-98475

Linux: s390/cmf: Fix virtual vs physical address confusion

Linux LinuxOperating systems
Open in ThreatlineRecord JSON
CVSS
NoneNot scored
ExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.17%Chance of exploitation activity in the next 30 days, higher than 5% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed in748ec2f7f5df9b4fc742546a8bfc8aa5d847353eAlso 7f78226eb743b362f52b212d7763801642539d1cCVE List
Published18 Oct 2026Updated 19 Oct 2026CVE List

What fixes it

  • 748ec2f7f5df9b4fc742546a8bfc8aa5d847353eLinuxCVE List
  • 7f78226eb743b362f52b212d7763801642539d1cLinuxCVE List

A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.

Description

In the Linux kernel, the following vulnerability has been resolved:

s390/cmf: Fix virtual vs physical address confusion

The measurement block address is an absolute address. Define the associated schib_config and schib fields as dma64_t to enable automatic detection of incorrect assignments. Also add the missing virt_to_dma64() translation.

Without this fix, a wrong address will be used by firmware when storing extended format channel measurement data on kernels built with CONFIG_RANDOMIZE_IDENTITY_BASE=y.

Text from CVE List

Affected versions 10

  • Linuxaffected: 14edd0d73bfef320fd5be11495687ba537aa6341 before b11f369be31ea11c746833e4d3ad51dcd6b5fa2bCVE List
  • Linuxaffected: 14edd0d73bfef320fd5be11495687ba537aa6341 before 748ec2f7f5df9b4fc742546a8bfc8aa5d847353eCVE List
  • Linuxaffected: 14edd0d73bfef320fd5be11495687ba537aa6341 before 7f78226eb743b362f52b212d7763801642539d1cCVE List
  • Linuxaffected: 14edd0d73bfef320fd5be11495687ba537aa6341 before f4d04425e66af2ecee9d1a49ae0484436f3c2fd1CVE List
  • Linuxaffected: 6.9CVE List
  • Linuxunaffected: all versions before 6.9CVE List
  • Linuxunaffected: 6.12.112 through 6.12.*CVE List
  • Linuxunaffected: 6.18.55 through 6.18.*CVE List
  • Linuxunaffected: 7.2.9 through 7.2.*CVE List
  • Linuxunaffected: 7.3CVE List

References 4