An out of bounds (OOB) memory access flaw was found in i2c_smbus_xfer_emulated in drivers/i2c/i2c-core-smbus.c in I2C subsystem. A read request for length (data->block) greater than 'I2C_SMBUS_BLOCK_MAX + 1' may cause underlying I2C driver write out of array's boundary. This could allow a local attacker with special user privilege (or root) to crash the system or leak kernel internal information.
Created kernel tracking bugs for this issue:
Affects: fedora-all [bug 1757369]
This was fixed for Fedora in the 4.14.15 stable update
Mitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.
This issue has been addressed in the following products:
Red Hat Enterprise Linux 7
Via RHSA-2020:2104 https://access.redhat.com/errata/RHSA-2020:2104
This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):