Bug 2429094 (CVE-2025-71086)

Summary: CVE-2025-71086 kernel: net: rose: fix invalid array index in rose_kill_by_device()
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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OS: Linux   
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Description OSIDB Bzimport 2026-01-13 16:06:17 UTC 
In the Linux kernel, the following vulnerability has been resolved:

net: rose: fix invalid array index in rose_kill_by_device()

rose_kill_by_device() collects sockets into a local array[] and then
iterates over them to disconnect sockets bound to a device being brought
down.

The loop mistakenly indexes array[cnt] instead of array[i]. For cnt <
ARRAY_SIZE(array), this reads an uninitialized entry; for cnt ==
ARRAY_SIZE(array), it is an out-of-bounds read. Either case can lead to
an invalid socket pointer dereference and also leaks references taken
via sock_hold().

Fix the index to use i.
Comment 1 Mauro Matteo Cascella 2026-01-14 09:00:39 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026011340-CVE-2025-71086-18be@gregkh/T