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CVE-2022-3077: i2c: ismt: prevent memory corruption in ismt_access() · torvalds/linux@690b254
A buffer overflow vulnerability was found in the Linux kernel Intel’s iSMT SMBus host controller driver in the way it handled the I2C_SMBUS_BLOCK_PROC_CALL case (via the ioctl I2C_SMBUS) with malicious input data. This flaw could allow a local user to crash the system.
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i2c: ismt: prevent memory corruption in ismt_access()
The "data->block[0]" variable comes from the user and is a number between 0-255. It needs to be capped to prevent writing beyond the end of dma_buffer[].
Fixes: 5e9a97b (“i2c: ismt: Adding support for I2C_SMBUS_BLOCK_PROC_CALL”) Reported-and-tested-by: Zheyu Ma [email protected] Signed-off-by: Dan Carpenter [email protected] Reviewed-by: Mika Westerberg [email protected] Signed-off-by: Linus Torvalds [email protected]
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An update for kernel is now available for Red Hat Enterprise Linux 9. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original. Related CVEs: * CVE-2022-2959: kernel: watch queue race condition can lead to privilege escalation * CVE-2022-2964: kernel: memory corruption in AX88179_178A based USB ethernet device. * CVE-2022-3077: kernel: i2c: unbounded length leads to buffer overflow in ismt_access() * CVE-2022-4139: kernel: i915: Incorrect GPU TLB flush can lead to random memory access * CVE-2022-30594: ...