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LIN1021-7861 : Security Advisory - linux - CVE-2021-47153

Created: Mar 25, 2024    Updated: May 22, 2024
Resolved Date: May 21, 2024
Found In Version:
Fix Version:
Severity: Standard
Applicable for: Wind River Linux LTS 21
Component/s: Kernel


In the Linux kernel, the following vulnerability has been resolved:

i2c: i801: Don't generate an interrupt on bus reset

Now that the i2c-i801 driver supports interrupts, setting the KILL bit
in a attempt to recover from a timed out transaction triggers an
interrupt. Unfortunately, the interrupt handler (i801_isr) is not
prepared for this situation and will try to process the interrupt as
if it was signaling the end of a successful transaction. In the case
of a block transaction, this can result in an out-of-range memory

This condition was reproduced several times by syzbot:

So disable interrupts while trying to reset the bus. Interrupts will
be enabled again for the following transaction.

CREATE(Triage):(User=admin) CVE-2021-47153 (


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