Bug#1061460: firmware-nonfree: CVE-2023-4969

[Salvatore Bonaccorso <carnil@debian.org>]

Source: firmware-nonfree
Version: 20230625-2
Severity: important
Tags: security upstream
X-Debbugs-Cc: carnil@debian.org, Debian Security Team <team@security.debian.org>

Hi,

The following vulnerability was published for firmware-nonfree.

CVE-2023-4969[0]:
| A GPU kernel can read sensitive data from another GPU kernel (even
| from another user or app) through an optimized GPU memory region
| called _local memory_ on various architectures.

There are though some unclarities about this, so just filling for
keeping track of the issue. [1] mentions that AMD expects to to start
rolling out mitigations beginning of March 2024, so we might see then
more where the mitigations lies and if firmware-nonfree are correct.
They mention there rather "upcoming driver updates".


If you fix the vulnerability please also make sure to include the
CVE (Common Vulnerabilities & Exposures) id in your changelog entry.

For further information see:

[0] https://security-tracker.debian.org/tracker/CVE-2023-4969
    https://www.cve.org/CVERecord?id=CVE-2023-4969
[1] https://www.amd.com/en/resources/product-security/bulletin/amd-sb-6010.html

Regards,
Salvatore