CVE-2023-2194

Severity: medium (CVSS 6.7 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2023-04-20 · updated 2026-06-17
Weakness: CWE-787

Description

An out-of-bounds write vulnerability was found in the Linux kernel's SLIMpro I2C device driver. The userspace "data->block[0]" variable was not capped to a number between 0-255 and was used as the size of a memcpy, possibly writing beyond the end of dma_buffer. This flaw could allow a local privileged user to crash the system or potentially achieve code execution.

Affected products

Fedoraproject Fedora: 38
Linux kernel: before 6.3; 6.3-rc1, 6.3-rc2, 6.3-rc3 — fixed in 6.3
Red Hat Enterprise Linux: 8.0, 9.0

How to fix

Upgrade to a fixed version: Linux kernel 6.3. Check the vendor advisory for mitigations.

References

https://bugzilla.redhat.com/show_bug.cgi?id=2188396
https://github.com/torvalds/linux/commit/92fbb6d1296f
https://lists.debian.org/debian-lts-announce/2023/05/msg00005.html
https://lists.debian.org/debian-lts-announce/2023/05/msg00006.html
https://bugzilla.redhat.com/show_bug.cgi?id=2188396
https://github.com/torvalds/linux/commit/92fbb6d1296f
https://lists.debian.org/debian-lts-announce/2023/05/msg00005.html
https://lists.debian.org/debian-lts-announce/2023/05/msg00006.html

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