Bug 2554863 (CVE-2026-98495) - CVE-2026-98495 kernel: net: arp: terminate device name before lookup
Summary: CVE-2026-98495 kernel: net: arp: terminate device name before lookup
Keywords:
Status: NEW
Alias: CVE-2026-98495
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: 2026-10-18 15:23 UTC by OSIDB Bzimport
Modified: 2026-10-20 13:56 UTC (History)
17 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Embargoed:


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Description OSIDB Bzimport 2026-10-18 15:23:53 UTC
In the Linux kernel, the following vulnerability has been resolved:

net: arp: terminate device name before lookup

The ARP ioctl copies a user-provided struct arpreq into a stack object. Its
arp_dev field may contain IFNAMSIZ bytes without a NUL terminator.

Such input is passed to dev_get_by_name_rcu() or __dev_get_by_name(), where
strcmp() can read past the end of the stack object when a matching
alternative interface name exists.

Terminate the field before the lookup to prevent the out-of-bounds read.


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