PT-2026-97974

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description An issue exists in the SMBus block transfer handling where the length specified in data-block0 is not validated early enough. This allows user-controlled oversized block lengths to reach...

kernel: i2c: stub: Reject I2C block transfers with invalid length

A flaw was found in the Linux kernel's i2c-stub driver. A local user with access to the /dev/i2c- device can exploit this vulnerability by issuing an I2C System Management Bus SMBus input/output control ioctl command with a specially crafted block transfer length. This invalid length can cause th...

kernel: i2c: stub: Reject I2C block transfers with invalid length

A flaw was found in the Linux kernel's i2c-stub driver. A local user with access to the /dev/i2c- device can exploit this vulnerability by issuing an I2C System Management Bus SMBus input/output control ioctl command with a specially crafted block transfer length. This invalid length can cause th...

i2c: stub: Reject I2C block transfers with invalid length

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SUSE CVE-2026-64191

In the Linux kernel, the following vulnerability has been resolved: i2c: stub: Reject I2C block transfers with invalid length The I2CSMBUSI2CBLOCKDATA case in stubxfer uses data-block0 as the transfer length. The existing check only clamps it to avoid overrunning the chip-words256 register array,...

CVE-2026-64191

The CVE-2026-64191 issue affects the Linux kernel i2c-stub driver (CONFIG_I2C_STUB=m) where I2C_SMBUS_I2C_BLOCK_DATA did not validate data->block[0] against I2C_SMBUS_BLOCK_MAX, allowing out-of-bounds access when an I2C_SMBUS_IOCTL with a block length > 32 is issued. The bug contrasts with ...

CVE-2026-64191 i2c: stub: Reject I2C block transfers with invalid length

In the Linux kernel, the following vulnerability has been resolved: i2c: stub: Reject I2C block transfers with invalid length The I2CSMBUSI2CBLOCKDATA case in stubxfer uses data-block0 as the transfer length. The existing check only clamps it to avoid overrunning the chip-words256 register array,...