vulnerability

Alma Linux: CVE-2021-47153: Moderate: kernel update (Multiple Advisories)

Severity
6
CVSS
(AV:L/AC:L/Au:M/C:C/I:N/A:C)
Published
03/25/2024
Added
06/06/2024
Modified
02/20/2025

Description

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
access.

This condition was reproduced several times by syzbot:
https://syzkaller.appspot.com/bug?extid=ed71512d469895b5b34e
https://syzkaller.appspot.com/bug?extid=8c8dedc0ba9e03f6c79e
https://syzkaller.appspot.com/bug?extid=c8ff0b6d6c73d81b610e
https://syzkaller.appspot.com/bug?extid=33f6c360821c399d69eb
https://syzkaller.appspot.com/bug?extid=be15dc0b1933f04b043a
https://syzkaller.appspot.com/bug?extid=b4d3fd1dfd53e90afd79

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

Solution(s)

alma-upgrade-bpftoolalma-upgrade-kernelalma-upgrade-kernel-abi-stablelistsalma-upgrade-kernel-corealma-upgrade-kernel-cross-headersalma-upgrade-kernel-debugalma-upgrade-kernel-debug-corealma-upgrade-kernel-debug-develalma-upgrade-kernel-debug-modulesalma-upgrade-kernel-debug-modules-extraalma-upgrade-kernel-develalma-upgrade-kernel-docalma-upgrade-kernel-headersalma-upgrade-kernel-modulesalma-upgrade-kernel-modules-extraalma-upgrade-kernel-rtalma-upgrade-kernel-rt-corealma-upgrade-kernel-rt-debugalma-upgrade-kernel-rt-debug-corealma-upgrade-kernel-rt-debug-develalma-upgrade-kernel-rt-debug-kvmalma-upgrade-kernel-rt-debug-modulesalma-upgrade-kernel-rt-debug-modules-extraalma-upgrade-kernel-rt-develalma-upgrade-kernel-rt-kvmalma-upgrade-kernel-rt-modulesalma-upgrade-kernel-rt-modules-extraalma-upgrade-kernel-toolsalma-upgrade-kernel-tools-libsalma-upgrade-kernel-tools-libs-develalma-upgrade-kernel-zfcpdumpalma-upgrade-kernel-zfcpdump-corealma-upgrade-kernel-zfcpdump-develalma-upgrade-kernel-zfcpdump-modulesalma-upgrade-kernel-zfcpdump-modules-extraalma-upgrade-perfalma-upgrade-python3-perf
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