What’s Vulnerable › Vulnerabilities

CVE-2026-98648: s390/uv: Prevent potential out-of-bounds read

• Severity: unknown
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-18 · updated 2026-10-19

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.

Affected products

• Linux kernel: 6.13 — fixed in 7.3

How to fix

Upgrade to a fixed version: Linux kernel 7.3. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/04bb5b2eb9f1d56110f14d3a4e31fa2c65fb026f
• https://git.kernel.org/stable/c/116bba758533a139bbede8d717a1371bd6d890f6
• https://git.kernel.org/stable/c/f47190b08b71e8482072978373ee88cb2dfbdaf4

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