CVE-2026-98648 PUBLISHED

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

Assigner: Linux
Reserved: 25.09.2026 Published: 18.10.2026 Updated: 18.10.2026

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.

Product Status

Vendor Linux
Product Linux
Versions Default: unaffected
  • affected from 7c9137af2042e0d67aae0ccd84afc8ffc4b0d95d to 04bb5b2eb9f1d56110f14d3a4e31fa2c65fb026f (excl.)
  • affected from 7c9137af2042e0d67aae0ccd84afc8ffc4b0d95d to 116bba758533a139bbede8d717a1371bd6d890f6 (excl.)
  • affected from 7c9137af2042e0d67aae0ccd84afc8ffc4b0d95d to f47190b08b71e8482072978373ee88cb2dfbdaf4 (excl.)
Vendor Linux
Product Linux
Versions Default: affected
  • Version 6.13 is affected
  • unaffected from 0 to 6.13 (excl.)
  • unaffected from 6.18.55 to 6.18.* (incl.)
  • unaffected from 7.2.9 to 7.2.* (incl.)
  • unaffected from 7.3-rc5 to * (incl.)

References