Bug 2347848 (CVE-2021-47642) - CVE-2021-47642 kernel: video: fbdev: nvidiafb: Use strscpy() to prevent buffer overflow
Summary: CVE-2021-47642 kernel: video: fbdev: nvidiafb: Use strscpy() to prevent buffe...
Keywords:
Status: NEW
Alias: CVE-2021-47642
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2025-02-26 03:08 UTC by OSIDB Bzimport
Modified: 2025-02-27 09:19 UTC (History)
4 users (show)

Fixed In Version:
Clone Of:
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Description OSIDB Bzimport 2025-02-26 03:08:51 UTC
In the Linux kernel, the following vulnerability has been resolved:

video: fbdev: nvidiafb: Use strscpy() to prevent buffer overflow

Coverity complains of a possible buffer overflow. However,
given the 'static' scope of nvidia_setup_i2c_bus() it looks
like that can't happen after examiniing the call sites.

CID 19036 (#1 of 1): Copy into fixed size buffer (STRING_OVERFLOW)
1. fixed_size_dest: You might overrun the 48-character fixed-size string
  chan->adapter.name by copying name without checking the length.
2. parameter_as_source: Note: This defect has an elevated risk because the
  source argument is a parameter of the current function.
 89        strcpy(chan->adapter.name, name);

Fix this warning by using strscpy() which will silence the warning and
prevent any future buffer overflows should the names used to identify the
channel become much longer.

Comment 1 Avinash Hanwate 2025-02-26 19:15:54 UTC
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025022647-CVE-2021-47642-ae1b@gregkh/T


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