CVE-2025-71086: net: rose: fix invalid array index in rose_kill_by_device()

Severity: high (CVSS 7.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.1% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-01-13 · updated 2026-10-15
Weakness: CWE-129

Description

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.

Affected products

Linux kernel: from 4.19.304 before 4.20; from 5.4.266 before 5.5; from 5.10.206 before 5.10.248; from 5.15.146 before 5.15.198; from 6.1.70 before 6.1.160; from 6.6.9 before 6.6.120 — fixed in 4.20, 5.10.248, 5.15.198, 5.5, 6.1.160, 6.12.64

How to fix

Upgrade to a fixed version: Linux kernel 4.20, 5.10.248, 5.15.198, 5.5. Check the vendor advisory for mitigations.

References

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