All vulnerabilities
CVE-2026-98648

Linux: s390/uv: Prevent potential out-of-bounds read

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 in04bb5b2eb9f1d56110f14d3a4e31fa2c65fb026fAlso 116bba758533a139bbede8d717a1371bd6d890f6CVE List
Published18 Oct 2026Updated 19 Oct 2026CVE List

What fixes it

  • 04bb5b2eb9f1d56110f14d3a4e31fa2c65fb026fLinuxCVE List
  • 116bba758533a139bbede8d717a1371bd6d890f6LinuxCVE 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/uv: Prevent potential out-of-bounds read

When the system has more than 85 secrets, the uv_secret_list struct array only holds up to 85 items per page, resulting in an out of bounds read in find_secret_in_page if the targeted secret is in the next page or not stored at all.

Fix this by looping over the number of stored secrets which is the per sub-list count of stored secrets and not the overall count.

Text from CVE List

Affected versions 8

  • Linuxaffected: 7c9137af2042e0d67aae0ccd84afc8ffc4b0d95d before 04bb5b2eb9f1d56110f14d3a4e31fa2c65fb026fCVE List
  • Linuxaffected: 7c9137af2042e0d67aae0ccd84afc8ffc4b0d95d before 116bba758533a139bbede8d717a1371bd6d890f6CVE List
  • Linuxaffected: 7c9137af2042e0d67aae0ccd84afc8ffc4b0d95d before f47190b08b71e8482072978373ee88cb2dfbdaf4CVE List
  • Linuxaffected: 6.13CVE List
  • Linuxunaffected: all versions before 6.13CVE List
  • Linuxunaffected: 6.18.55 through 6.18.*CVE List
  • Linuxunaffected: 7.2.9 through 7.2.*CVE List
  • Linuxunaffected: 7.3CVE List

References 3