PT-2025-8854 · Linux+5 · Linux Kernel+5
Foster Snowhill
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Published
2025-01-26
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Updated
2026-04-20
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CVE-2025-21742
CVSS v3.1
7.1
High
| Vector | AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H |
Name of the Vulnerable Software and Affected Versions
Linux kernel (affected versions not specified)
Description
A vulnerability in the Linux kernel has been identified, specifically in the usbnet: ipheth component. The issue arises from the original code allowing the start of NDP16 to be anywhere within the URB based on the
wNdpIndex value in NTH16. This led to a potential out-of-bounds read, as only the start position of NDP16 was checked, allowing the fixed-length part of NDP16 to extend past the end of URB. To address this, the code now relies on and checks for the specific format where the NDP16 header directly follows NTH16, as seen on iOS devices. Additionally, an existing NCM-specific minimal URB length check ensures that the fixed-length part of NDP16 plus a set amount of DPEs fit within the URB.Recommendations
At the moment, there is no information about a newer version that contains a fix for this vulnerability.
Exploit
Out of bounds Read
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Weakness Enumeration
Related Identifiers
Affected Products
Alt Linux
Astra Linux
Linuxmint
Linux Kernel
Suse
Ubuntu