CVE-2026-46190mtd: spi-nor: debugfs: fix out-of-bounds read in spi_nor_params_show()
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 7.1 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Modified
- Record last updated
- Oct 15, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | 0257be79fc4a16a3252ce80aa13b3640f728c425 builds before 231b8e1f604f6e0a7e100536f506cdf482e2c5f5; 0257be79fc4a16a3252ce80aa13b3640f728c425 builds before 9a80c458320e0514e11945402dd6e48fcee05524; from 0257be79fc4a16a3252ce80aa13b3640f728c425 before ca18c180b053f6ce80394322b314ac721c316af7; 0257be79fc4a16a3252ce80aa13b3640f728c425 builds before 34bdcfb496b29f9a52431194f94473b37fb8c162; from 0257be79fc4a16a3252ce80aa13b3640f728c425 before c0b654bc0b76a1da102d9138be1ed1223bd99310; from 0257be79fc4a16a3252ce80aa13b3640f728c425 before e47029b977e747cb3a9174308fd55762cce70147 | CNA record |
Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem siemens:simatic_s7_1500_tm_mfp_gnu_linux_subsystem (from the name) | all versions | CISA ADP |
linux linux_kernel linux:linux_kernel | from 5.19 before 6.6.140; from 6.7 before 6.12.88; from 6.13 before 6.18.30; from 6.19 before 7.0.7; 7.1 | NVD |
References
- https://git.kernel.org/stable/c/231b8e1f604f6e0a7e100536f506cdf482e2c5f5
- https://git.kernel.org/stable/c/9a80c458320e0514e11945402dd6e48fcee05524patch
- https://git.kernel.org/stable/c/ca18c180b053f6ce80394322b314ac721c316af7patch
- https://git.kernel.org/stable/c/34bdcfb496b29f9a52431194f94473b37fb8c162patch
- https://git.kernel.org/stable/c/c0b654bc0b76a1da102d9138be1ed1223bd99310patch
- https://git.kernel.org/stable/c/e47029b977e747cb3a9174308fd55762cce70147patch
- https://cert-portal.siemens.com/productcert/html/ssa-784472.html
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.