{"id":"CVE-2025-37896","summary":"spi: spi-mem: Add fix to avoid divide error","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nspi: spi-mem: Add fix to avoid divide error\n\nFor some SPI flash memory operations, dummy bytes are not mandatory. For\nexample, in Winbond SPINAND flash memory devices, the `write_cache` and\n`update_cache` operation variants have zero dummy bytes. Calculating the\nduration for SPI memory operations with zero dummy bytes causes\na divide error when `ncycles` is calculated in the\nspi_mem_calc_op_duration().\n\nAdd changes to skip the 'ncylcles' calculation for zero dummy bytes.\n\nFollowing divide error is fixed by this change:\n\n Oops: divide error: 0000 [#1] PREEMPT SMP NOPTI\n...\n\n  ? do_trap+0xdb/0x100\n  ? do_error_trap+0x75/0xb0\n  ? spi_mem_calc_op_duration+0x56/0xb0\n  ? exc_divide_error+0x3b/0x70\n  ? spi_mem_calc_op_duration+0x56/0xb0\n  ? asm_exc_divide_error+0x1b/0x20\n  ? spi_mem_calc_op_duration+0x56/0xb0\n  ? spinand_select_op_variant+0xee/0x190 [spinand]\n  spinand_match_and_init+0x13e/0x1a0 [spinand]\n  spinand_manufacturer_match+0x6e/0xa0 [spinand]\n  spinand_probe+0x357/0x7f0 [spinand]\n  ? kernfs_activate+0x87/0xd0\n  spi_mem_probe+0x7a/0xb0\n  spi_probe+0x7d/0x130","modified":"2026-04-02T12:47:37.098069Z","published":"2025-05-20T15:21:32.685Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/37xxx/CVE-2025-37896.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/1915dbd67dadc0bb35670c8e28229baa29368d17"},{"type":"WEB","url":"https://git.kernel.org/stable/c/8e4d3d8a5e51e07bd0d6cdd81b5e4af79f796927"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/37xxx/CVE-2025-37896.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-37896"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"226d6cb3cb799aae46d0dd19a521133997d9db11"},{"fixed":"1915dbd67dadc0bb35670c8e28229baa29368d17"},{"fixed":"8e4d3d8a5e51e07bd0d6cdd81b5e4af79f796927"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-37896.json"}}],"schema_version":"1.7.5"}