{"id":"CVE-2026-98722","state":"PUBLISHED","title":"mtd: block2mtd: Fix divide error when erase_size is zero","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.","publishedAt":"2026-10-18T15:46:58.093Z","updatedAt":"2026-10-30T12:39:05.611Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"ea6d833a3fddcd1d60414d48f34c7f4fbe88608f","status":"affected","lessThan":"c8004de07739fa9a39e310e859384f1458d7d076","versionType":"git"},{"version":"ea6d833a3fddcd1d60414d48f34c7f4fbe88608f","status":"affected","lessThan":"7ad5287e58d7aa1a848105f119e6c5b00446882f","versionType":"git"},{"version":"ea6d833a3fddcd1d60414d48f34c7f4fbe88608f","status":"affected","lessThan":"fd73c079abc58e10183a4db4dc9dc5012db17476","versionType":"git"},{"version":"ea6d833a3fddcd1d60414d48f34c7f4fbe88608f","status":"affected","lessThan":"bff83b723e93acc788bd690dc4bc1f6f4356c35b","versionType":"git"},{"version":"ea6d833a3fddcd1d60414d48f34c7f4fbe88608f","status":"affected","lessThan":"826170a49ca1315af6b293a02200585b1e2186d9","versionType":"git"},{"version":"ea6d833a3fddcd1d60414d48f34c7f4fbe88608f","status":"affected","lessThan":"a991c28066e7ba4da7450bb04478849f7ac6a14a","versionType":"git"},{"version":"ea6d833a3fddcd1d60414d48f34c7f4fbe88608f","status":"affected","lessThan":"21d0f05989bf0d5cef57b467a7fa4feefbd7236a","versionType":"git"},{"version":"ea6d833a3fddcd1d60414d48f34c7f4fbe88608f","status":"affected","lessThan":"b5965c4221165045e19736794ca5f48ae3d67142","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/mtd/devices/block2mtd.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"3.15","status":"affected"},{"version":"0","status":"unaffected","lessThan":"3.15","versionType":"semver"},{"version":"5.10.273","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.224","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.191","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.160","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.113","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.56","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.10","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/mtd/devices/block2mtd.c"]}],"references":["https://git.kernel.org/stable/c/c8004de07739fa9a39e310e859384f1458d7d076","https://git.kernel.org/stable/c/7ad5287e58d7aa1a848105f119e6c5b00446882f","https://git.kernel.org/stable/c/fd73c079abc58e10183a4db4dc9dc5012db17476","https://git.kernel.org/stable/c/bff83b723e93acc788bd690dc4bc1f6f4356c35b","https://git.kernel.org/stable/c/826170a49ca1315af6b293a02200585b1e2186d9","https://git.kernel.org/stable/c/a991c28066e7ba4da7450bb04478849f7ac6a14a","https://git.kernel.org/stable/c/21d0f05989bf0d5cef57b467a7fa4feefbd7236a","https://git.kernel.org/stable/c/b5965c4221165045e19736794ca5f48ae3d67142"],"weaknesses":[],"ingestedAt":"2026-10-30T12:58:04.520Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/98xxx/CVE-2026-98722.json","commit":"1f312381e38164a43607eebab851b151dd16861e","baselineCommit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-98722","state":"PUBLISHED","datePublished":"2026-10-18T15:46:58.093Z","dateUpdated":"2026-10-30T12:39:05.611Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-09-25T10:25:14.366Z"},"containers":{"cna":{"title":"mtd: block2mtd: Fix divide error when erase_size is zero","descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"ea6d833a3fddcd1d60414d48f34c7f4fbe88608f","status":"affected","lessThan":"c8004de07739fa9a39e310e859384f1458d7d076","versionType":"git"},{"version":"ea6d833a3fddcd1d60414d48f34c7f4fbe88608f","status":"affected","lessThan":"7ad5287e58d7aa1a848105f119e6c5b00446882f","versionType":"git"},{"version":"ea6d833a3fddcd1d60414d48f34c7f4fbe88608f","status":"affected","lessThan":"fd73c079abc58e10183a4db4dc9dc5012db17476","versionType":"git"},{"version":"ea6d833a3fddcd1d60414d48f34c7f4fbe88608f","status":"affected","lessThan":"bff83b723e93acc788bd690dc4bc1f6f4356c35b","versionType":"git"},{"version":"ea6d833a3fddcd1d60414d48f34c7f4fbe88608f","status":"affected","lessThan":"826170a49ca1315af6b293a02200585b1e2186d9","versionType":"git"},{"version":"ea6d833a3fddcd1d60414d48f34c7f4fbe88608f","status":"affected","lessThan":"a991c28066e7ba4da7450bb04478849f7ac6a14a","versionType":"git"},{"version":"ea6d833a3fddcd1d60414d48f34c7f4fbe88608f","status":"affected","lessThan":"21d0f05989bf0d5cef57b467a7fa4feefbd7236a","versionType":"git"},{"version":"ea6d833a3fddcd1d60414d48f34c7f4fbe88608f","status":"affected","lessThan":"b5965c4221165045e19736794ca5f48ae3d67142","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/mtd/devices/block2mtd.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"3.15","status":"affected"},{"version":"0","status":"unaffected","lessThan":"3.15","versionType":"semver"},{"version":"5.10.273","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.224","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.191","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.160","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.113","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.56","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.10","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/mtd/devices/block2mtd.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/c8004de07739fa9a39e310e859384f1458d7d076"},{"url":"https://git.kernel.org/stable/c/7ad5287e58d7aa1a848105f119e6c5b00446882f"},{"url":"https://git.kernel.org/stable/c/fd73c079abc58e10183a4db4dc9dc5012db17476"},{"url":"https://git.kernel.org/stable/c/bff83b723e93acc788bd690dc4bc1f6f4356c35b"},{"url":"https://git.kernel.org/stable/c/826170a49ca1315af6b293a02200585b1e2186d9"},{"url":"https://git.kernel.org/stable/c/a991c28066e7ba4da7450bb04478849f7ac6a14a"},{"url":"https://git.kernel.org/stable/c/21d0f05989bf0d5cef57b467a7fa4feefbd7236a"},{"url":"https://git.kernel.org/stable/c/b5965c4221165045e19736794ca5f48ae3d67142"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-30T12:39:05.611Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.15","versionEndExcluding":"5.10.273"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.15","versionEndExcluding":"5.15.224"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.15","versionEndExcluding":"6.1.191"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.15","versionEndExcluding":"6.6.160"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.15","versionEndExcluding":"6.12.113"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.15","versionEndExcluding":"6.18.56"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.15","versionEndExcluding":"7.2.10"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.15","versionEndExcluding":"7.3"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}