Bug 2348572 (CVE-2025-21743) - CVE-2025-21743 kernel: usbnet: ipheth: fix possible overflow in DPE length check
Summary: CVE-2025-21743 kernel: usbnet: ipheth: fix possible overflow in DPE length check
Keywords:
Status: NEW
Alias: CVE-2025-21743
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: 2025-02-27 03:03 UTC by OSIDB Bzimport
Modified: 2025-02-27 17:24 UTC (History)
4 users (show)

Fixed In Version:
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Description OSIDB Bzimport 2025-02-27 03:03:41 UTC 
In the Linux kernel, the following vulnerability has been resolved:

usbnet: ipheth: fix possible overflow in DPE length check

Originally, it was possible for the DPE length check to overflow if
wDatagramIndex + wDatagramLength > U16_MAX. This could lead to an OoB
read.

Move the wDatagramIndex term to the other side of the inequality.

An existing condition ensures that wDatagramIndex < urb->actual_length.
Comment 1 Michal Findra 2025-02-27 17:17:04 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025022600-CVE-2025-21743-c67f@gregkh/T
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