mtd: block2mtd: Fix divide error when erase_size is zero
In the Linux kernel, the following vulnerability has been resolved: mtd: block2mtd: Fix divide error when erase_size is zero The erase size is parsed from the "block2mtd" module parameter and can be set to zero. add_device() then evaluates if (size % erase_size) with a zero divisor, which triggers a divide error: divide error: 0000 [#1] PREEMPT SMP PTI RIP: 0010:add_device drivers/mtd/devices/block2mtd.c:296 [inline] RIP: 0010:block2mtd_setup2+0x592/0xda0 drivers/mtd/devices/block2mtd.c:459 Call Trace: block2mtd_setup+0x27/0xe0 drivers/mtd/devices/block2mtd.c:476 param_attr_store+0x214/0x310 kernel/params.c:589 module_attr_store+0x65/0x90 kernel/params.c:904 kernfs_fop_write_iter+0x3a4/0x540 fs/kernfs/file.c:345 ... Reject a zero erase size before performing the modulo operation so the existing "erasesize must be a divisor of device size" error path reports the invalid argument and frees the device.
CVE-2026-98722
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-98722
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "ea6d833a3fddcd1d60414d48f34c7f4fbe88608f",
"lessThan": "bff83b723e93acc788bd690dc4bc1f6f4356c35b",
"versionType": "git"
},
{
"status": "affected",
"version": "ea6d833a3fddcd1d60414d48f34c7f4fbe88608f",
"lessThan": "826170a49ca1315af6b293a02200585b1e2186d9",
"versionType": "git"
},
{
"status": "affected",
"version": "ea6d833a3fddcd1d60414d48f34c7f4fbe88608f",
"lessThan": "a991c28066e7ba4da7450bb04478849f7ac6a14a",
"versionType": "git"
},
{
"status": "affected",
"version": "ea6d833a3fddcd1d60414d48f34c7f4fbe88608f",
"lessThan": "21d0f05989bf0d5cef57b467a7fa4feefbd7236a",
"versionType": "git"
},
{
"status": "affected",
"version": "ea6d833a3fddcd1d60414d48f34c7f4fbe88608f",
"lessThan": "b5965c4221165045e19736794ca5f48ae3d67142",
"versionType": "git"
}
],
"programFiles": [
"drivers/mtd/devices/block2mtd.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "3.15"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "3.15",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.6.160",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.113",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.56",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.10",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/mtd/devices/block2mtd.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-98722
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #48928 · Revision 1
- Added to Heist Feed
- Publisher date