{"id":"CVE-2026-98722","published":"2026-10-18T16:17:25.813","lastModified":"2026-10-19T10:19:36.410","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nmtd: block2mtd: Fix divide error when erase_size is zero\n\nThe erase size is parsed from the \"block2mtd\" module parameter and can\nbe set to zero. add_device() then evaluates\n\n        if (size % erase_size)\n\nwith a zero divisor, which triggers a divide error:\n\ndivide error: 0000 [#1] PREEMPT SMP PTI\nRIP: 0010:add_device drivers/mtd/devices/block2mtd.c:296 [inline]\nRIP: 0010:block2mtd_setup2+0x592/0xda0 drivers/mtd/devices/block2mtd.c:459\nCall Trace:\nblock2mtd_setup+0x27/0xe0 drivers/mtd/devices/block2mtd.c:476\nparam_attr_store+0x214/0x310 kernel/params.c:589\nmodule_attr_store+0x65/0x90 kernel/params.c:904\nkernfs_fop_write_iter+0x3a4/0x540 fs/kernfs/file.c:345\n...\n\nReject a zero erase size before performing the modulo operation so the\nexisting \"erasesize must be a divisor of device size\" error path\nreports the invalid argument and frees the device.","cvssScore":null,"cvssSeverity":null,"cvssVector":null,"cwes":[],"vendors":[],"products":[],"references":[{"url":"https://git.kernel.org/stable/c/21d0f05989bf0d5cef57b467a7fa4feefbd7236a","tags":[]},{"url":"https://git.kernel.org/stable/c/826170a49ca1315af6b293a02200585b1e2186d9","tags":[]},{"url":"https://git.kernel.org/stable/c/a991c28066e7ba4da7450bb04478849f7ac6a14a","tags":[]},{"url":"https://git.kernel.org/stable/c/b5965c4221165045e19736794ca5f48ae3d67142","tags":[]}],"exploitRefs":[],"hasPoc":false,"ai":null}