mtd: block2mtd: Fix divide error when erase_size is zero (Linux Linux)
At a glance
- Source
- NVD
- EPSS
- EPSS 0.18 % · percentile 7 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- Linux
- NVD status
- Received
Description
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.
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
European references
- ENISA EUVD · EUVD-2026-103976
- GCVE · GCVE-0-2026-98722
CERT-FR advisories
- CERTFR-2026-AVI-1375 — Multiples vulnérabilités dans le noyau Linux de Debian LTS · cert.ssi.gouv.fr
Affected products
| Product | Versions |
|---|---|
| Linux · Linux | affected ea6d833a3fddcd1d60414d48f34c7f4fbe88608f < c8004de07739fa9a39e310e859384f1458d7d076 ; affected ea6d833a3fddcd1d60414d48f34c7f4fbe88608f < 7ad5287e58d7aa1a848105f119e6c5b00446882f ; affected ea6d833a3fddcd1d60414d48f34c7f4fbe88608f < fd73c079abc58e10183a4db4dc9dc5012db17476 ; affected ea6d833a3fddcd1d60414d48f34c7f4fbe88608f < bff83b723e93acc788bd690dc4bc1f6f4356c35b ; affected ea6d833a3fddcd1d60414d48f34c7f4fbe88608f < 826170a49ca1315af6b293a02200585b1e2186d9 ; affected ea6d833a3fddcd1d60414d48f34c7f4fbe88608f < a991c28066e7ba4da7450bb04478849f7ac6a14a |
| Linux · Linux | affected 3.15 ; unaffected 0 < 3.15 ; unaffected 5.10.273 ≤ 5.10.* ; unaffected 5.15.224 ≤ 5.15.* ; unaffected 6.1.191 ≤ 6.1.* ; unaffected 6.6.160 ≤ 6.6.* |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| CERT-FR (ANSSI) | Licence Ouverte / Etalab 2.0 |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |