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Vulnerability · Published Oct 18, 2026 · Assigned by Linux

CVE-2026-98722mtd: block2mtd: Fix divide error when erase_size is zero

Unrated

In plain English

A security flaw in Linux from Linux. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 7% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS )–Not rated
Exploit odds (30 days)0.2%top 92.8% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known

Official 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.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12linuxno fix listedDEBIAN-CVE-2026-98722
Debian:13linux6.12.113-1DEBIAN-CVE-2026-98722
Debian:14linux7.2.10-1DEBIAN-CVE-2026-98722
Debian:12linux-6.126.12.113-1~deb12u1DEBIAN-CVE-2026-98722
Ubuntu:22.04:LTSlinuxno fix listedUBUNTU-CVE-2026-98722
Ubuntu:24.04:LTSlinuxno fix listedUBUNTU-CVE-2026-98722
Ubuntu:26.04:LTSlinuxno fix listedUBUNTU-CVE-2026-98722
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2026-98722
Ubuntu:22.04:LTSlinux-awsno fix listedUBUNTU-CVE-2026-98722
Ubuntu:24.04:LTSlinux-awsno fix listedUBUNTU-CVE-2026-98722
Ubuntu:26.04:LTSlinux-awsno fix listedUBUNTU-CVE-2026-98722
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2026-98722
Ubuntu:24.04:LTSlinux-aws-6.14no fix listedUBUNTU-CVE-2026-98722
Ubuntu:24.04:LTSlinux-aws-6.17no fix listedUBUNTU-CVE-2026-98722
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2026-98722
Ubuntu:22.04:LTSlinux-aws-6.5no fix listedUBUNTU-CVE-2026-98722
Ubuntu:22.04:LTSlinux-aws-6.8no fix listedUBUNTU-CVE-2026-98722
Ubuntu:24.04:LTSlinux-aws-7.0no fix listedUBUNTU-CVE-2026-98722
Ubuntu:22.04:LTSlinux-azureno fix listedUBUNTU-CVE-2026-98722
Ubuntu:24.04:LTSlinux-azureno fix listedUBUNTU-CVE-2026-98722
Ubuntu:26.04:LTSlinux-azureno fix listedUBUNTU-CVE-2026-98722
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2026-98722
Ubuntu:24.04:LTSlinux-azure-6.11no fix listedUBUNTU-CVE-2026-98722
Ubuntu:24.04:LTSlinux-azure-6.14no fix listedUBUNTU-CVE-2026-98722
Ubuntu:24.04:LTSlinux-azure-6.17no fix listedUBUNTU-CVE-2026-98722
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2026-98722
Ubuntu:22.04:LTSlinux-azure-6.5no fix listedUBUNTU-CVE-2026-98722
Ubuntu:22.04:LTSlinux-azure-6.8no fix listedUBUNTU-CVE-2026-98722
Ubuntu:24.04:LTSlinux-azure-7.0no fix listedUBUNTU-CVE-2026-98722
Ubuntu:22.04:LTSlinux-azure-fdeno fix listedUBUNTU-CVE-2026-98722
Ubuntu:24.04:LTSlinux-azure-fdeno fix listedUBUNTU-CVE-2026-98722
Ubuntu:26.04:LTSlinux-azure-fdeno fix listedUBUNTU-CVE-2026-98722
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2026-98722
Ubuntu:24.04:LTSlinux-azure-fde-6.14no fix listedUBUNTU-CVE-2026-98722
Ubuntu:24.04:LTSlinux-azure-fde-6.17no fix listedUBUNTU-CVE-2026-98722
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2026-98722
Ubuntu:22.04:LTSlinux-azure-fde-6.8no fix listedUBUNTU-CVE-2026-98722
Ubuntu:24.04:LTSlinux-azure-fde-7.0no fix listedUBUNTU-CVE-2026-98722
Ubuntu:24.04:LTSlinux-azure-nvidiano fix listedUBUNTU-CVE-2026-98722
Ubuntu:24.04:LTSlinux-azure-nvidia-6.14no fix listedUBUNTU-CVE-2026-98722
Ubuntu:22.04:LTSlinux-gcpno fix listedUBUNTU-CVE-2026-98722
Ubuntu:24.04:LTSlinux-gcpno fix listedUBUNTU-CVE-2026-98722
Ubuntu:26.04:LTSlinux-gcpno fix listedUBUNTU-CVE-2026-98722
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2026-98722
Ubuntu:24.04:LTSlinux-gcp-6.11no fix listedUBUNTU-CVE-2026-98722
Ubuntu:24.04:LTSlinux-gcp-6.14no fix listedUBUNTU-CVE-2026-98722
Ubuntu:24.04:LTSlinux-gcp-6.17no fix listedUBUNTU-CVE-2026-98722
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2026-98722
Ubuntu:22.04:LTSlinux-gcp-6.5no fix listedUBUNTU-CVE-2026-98722
Ubuntu:22.04:LTSlinux-gcp-6.8no fix listedUBUNTU-CVE-2026-98722
Ubuntu:24.04:LTSlinux-gcp-7.0no fix listedUBUNTU-CVE-2026-98722
Ubuntu:22.04:LTSlinux-gkeno fix listedUBUNTU-CVE-2026-98722
Ubuntu:24.04:LTSlinux-gkeno fix listedUBUNTU-CVE-2026-98722
Ubuntu:26.04:LTSlinux-gkeno fix listedUBUNTU-CVE-2026-98722
Ubuntu:22.04:LTSlinux-gkeopno fix listedUBUNTU-CVE-2026-98722
Ubuntu:24.04:LTSlinux-gkeopno fix listedUBUNTU-CVE-2026-98722
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2026-98722
Ubuntu:24.04:LTSlinux-hwe-6.11no fix listedUBUNTU-CVE-2026-98722
Ubuntu:24.04:LTSlinux-hwe-6.14no fix listedUBUNTU-CVE-2026-98722
Ubuntu:24.04:LTSlinux-hwe-6.17no fix listedUBUNTU-CVE-2026-98722
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2026-98722
Ubuntu:22.04:LTSlinux-hwe-6.5no fix listedUBUNTU-CVE-2026-98722
Ubuntu:22.04:LTSlinux-hwe-6.8no fix listedUBUNTU-CVE-2026-98722
Ubuntu:24.04:LTSlinux-hwe-7.0no fix listedUBUNTU-CVE-2026-98722
Ubuntu:22.04:LTSlinux-ibmno fix listedUBUNTU-CVE-2026-98722
Ubuntu:24.04:LTSlinux-ibmno fix listedUBUNTU-CVE-2026-98722
Ubuntu:26.04:LTSlinux-ibmno fix listedUBUNTU-CVE-2026-98722
Ubuntu:22.04:LTSlinux-ibm-6.8no fix listedUBUNTU-CVE-2026-98722
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2026-98722
Ubuntu:22.04:LTSlinux-intel-iotgno fix listedUBUNTU-CVE-2026-98722
Ubuntu:22.04:LTSlinux-kvmno fix listedUBUNTU-CVE-2026-98722
Ubuntu:22.04:LTSlinux-lowlatencyno fix listedUBUNTU-CVE-2026-98722
Ubuntu:24.04:LTSlinux-lowlatencyno fix listedUBUNTU-CVE-2026-98722
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2026-98722
Ubuntu:24.04:LTSlinux-lowlatency-hwe-6.11no fix listedUBUNTU-CVE-2026-98722
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2026-98722
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.5no fix listedUBUNTU-CVE-2026-98722
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.8no fix listedUBUNTU-CVE-2026-98722
Ubuntu:22.04:LTSlinux-nvidiano fix listedUBUNTU-CVE-2026-98722
Ubuntu:24.04:LTSlinux-nvidiano fix listedUBUNTU-CVE-2026-98722
Ubuntu:26.04:LTSlinux-nvidiano fix listedUBUNTU-CVE-2026-98722
Ubuntu:24.04:LTSlinux-nvidia-6.11no fix listedUBUNTU-CVE-2026-98722
Ubuntu:24.04:LTSlinux-nvidia-6.17no fix listedUBUNTU-CVE-2026-98722
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2026-98722
Ubuntu:22.04:LTSlinux-nvidia-6.5no fix listedUBUNTU-CVE-2026-98722
Ubuntu:22.04:LTSlinux-nvidia-6.8no fix listedUBUNTU-CVE-2026-98722
Ubuntu:24.04:LTSlinux-nvidia-7.0no fix listedUBUNTU-CVE-2026-98722
Ubuntu:26.04:LTSlinux-nvidia-bosno fix listedUBUNTU-CVE-2026-98722
Ubuntu:24.04:LTSlinux-nvidia-lowlatencyno fix listedUBUNTU-CVE-2026-98722
Ubuntu:22.04:LTSlinux-nvidia-tegrano fix listedUBUNTU-CVE-2026-98722
Ubuntu:24.04:LTSlinux-nvidia-tegrano fix listedUBUNTU-CVE-2026-98722
Ubuntu:22.04:LTSlinux-nvidia-tegra-igxno fix listedUBUNTU-CVE-2026-98722
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2026-98722
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2026-98722
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2026-98722
Ubuntu:24.04:LTSlinux-oem-6.11no fix listedUBUNTU-CVE-2026-98722
Ubuntu:24.04:LTSlinux-oem-6.14no fix listedUBUNTU-CVE-2026-98722
Ubuntu:24.04:LTSlinux-oem-6.17no fix listedUBUNTU-CVE-2026-98722
Ubuntu:22.04:LTSlinux-oem-6.5no fix listedUBUNTU-CVE-2026-98722
Ubuntu:24.04:LTSlinux-oem-6.8no fix listedUBUNTU-CVE-2026-98722
Ubuntu:26.04:LTSlinux-oem-7.0no fix listedUBUNTU-CVE-2026-98722
Ubuntu:22.04:LTSlinux-oracleno fix listedUBUNTU-CVE-2026-98722
Ubuntu:24.04:LTSlinux-oracleno fix listedUBUNTU-CVE-2026-98722
Ubuntu:26.04:LTSlinux-oracleno fix listedUBUNTU-CVE-2026-98722
Ubuntu:24.04:LTSlinux-oracle-6.14no fix listedUBUNTU-CVE-2026-98722
Ubuntu:24.04:LTSlinux-oracle-6.17no fix listedUBUNTU-CVE-2026-98722
Ubuntu:22.04:LTSlinux-oracle-6.5no fix listedUBUNTU-CVE-2026-98722
Ubuntu:22.04:LTSlinux-oracle-6.8no fix listedUBUNTU-CVE-2026-98722
Ubuntu:24.04:LTSlinux-oracle-7.0no fix listedUBUNTU-CVE-2026-98722
Ubuntu:22.04:LTSlinux-raspino fix listedUBUNTU-CVE-2026-98722
Ubuntu:24.04:LTSlinux-raspino fix listedUBUNTU-CVE-2026-98722
Ubuntu:26.04:LTSlinux-raspino fix listedUBUNTU-CVE-2026-98722
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2026-98722
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2026-98722
Ubuntu:24.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2026-98722
Ubuntu:26.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2026-98722
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2026-98722
Ubuntu:24.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2026-98722
Ubuntu:26.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2026-98722
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2026-98722
Ubuntu:24.04:LTSlinux-riscv-6.14no fix listedUBUNTU-CVE-2026-98722
Ubuntu:24.04:LTSlinux-riscv-6.17no fix listedUBUNTU-CVE-2026-98722
Ubuntu:22.04:LTSlinux-riscv-6.5no fix listedUBUNTU-CVE-2026-98722
Ubuntu:22.04:LTSlinux-riscv-6.8no fix listedUBUNTU-CVE-2026-98722
Ubuntu:24.04:LTSlinux-riscv-7.0no fix listedUBUNTU-CVE-2026-98722
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2026-98722
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2026-98722
Ubuntu:22.04:LTSlinux-starfive-6.5no fix listedUBUNTU-CVE-2026-98722
Ubuntu:24.04:LTSlinux-vmwareno fix listedUBUNTU-CVE-2026-98722
Ubuntu:24.04:LTSlinux-xilinxno fix listedUBUNTU-CVE-2026-98722
Ubuntu:22.04:LTSlinux-xilinx-zynqmpno fix listedUBUNTU-CVE-2026-98722

Affected products (as reported)

VendorProductVersions
Linux Linux ea6d833a3fddcd1d60414d48f34c7f4fbe88608f – before c8004de07739fa9a39e310e859384f1458d7d076ea6d833a3fddcd1d60414d48f34c7f4fbe88608f – before 7ad5287e58d7aa1a848105f119e6c5b00446882fea6d833a3fddcd1d60414d48f34c7f4fbe88608f – before fd73c079abc58e10183a4db4dc9dc5012db17476ea6d833a3fddcd1d60414d48f34c7f4fbe88608f – before bff83b723e93acc788bd690dc4bc1f6f4356c35bea6d833a3fddcd1d60414d48f34c7f4fbe88608f – before 826170a49ca1315af6b293a02200585b1e2186d9ea6d833a3fddcd1d60414d48f34c7f4fbe88608f – before a991c28066e7ba4da7450bb04478849f7ac6a14aea6d833a3fddcd1d60414d48f34c7f4fbe88608f – before 21d0f05989bf0d5cef57b467a7fa4feefbd7236aea6d833a3fddcd1d60414d48f34c7f4fbe88608f – before b5965c4221165045e19736794ca5f48ae3d67142
Linux Linux 3.15

References