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.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
0257be79fc4a16a3252ce80aa13b3640f728c425 to < 231b8e1f604f6e0a7e100536f506cdf482e2c5f5affected0257be79fc4a16a3252ce80aa13b3640f728c425 to < 9a80c458320e0514e11945402dd6e48fcee05524affected0257be79fc4a16a3252ce80aa13b3640f728c425 to < ca18c180b053f6ce80394322b314ac721c316af7affected0257be79fc4a16a3252ce80aa13b3640f728c425 to < 34bdcfb496b29f9a52431194f94473b37fb8c162affected0257be79fc4a16a3252ce80aa13b3640f728c425 to < c0b654bc0b76a1da102d9138be1ed1223bd99310affected0257be79fc4a16a3252ce80aa13b3640f728c425 to < e47029b977e747cb3a9174308fd55762cce70147affected
Linux Linux
Default version status: affected
5.19affected0 to < 5.19unaffected6.1.176 to ≤ 6.1.*unaffected6.6.140 to ≤ 6.6.*unaffected6.12.88 to ≤ 6.12.*unaffected6.18.30 to ≤ 6.18.*unaffected7.0.7 to ≤ 7.0.*unaffected7.1 to ≤ *unaffected
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 ↗
- https://cert-portal.siemens.com/productcert/html/ssa-784472.html ↗