CVE-2025-38657

wifi: rtw89: mcc: prevent shift wrapping in rtw89_core_mlsr_switch()

Description

In the Linux kernel, the following vulnerability has been resolved: wifi: rtw89: mcc: prevent shift wrapping in rtw89_core_mlsr_switch() The "link_id" value comes from the user via debugfs. If it's larger than BITS_PER_LONG then that would result in shift wrapping and potentially an out of bounds access later. In fact, we can limit it to IEEE80211_MLD_MAX_NUM_LINKS (15). Fortunately, only root can write to debugfs files so the security impact is minimal.

N/A

CVSS

Severity:

EPSS 0.02%

Affected: Linux Linux

References

Link	Tags
https://git.kernel.org/stable/c/417cfa9cc44fbe6bceab786f9a4ee5a210f1288e
https://git.kernel.org/stable/c/53cf488927a0f79968f9c03c4d1e00d2a79731c3

Frequently Asked Questions

What is the severity of CVE-2025-38657?: CVE-2025-38657 has not yet been assigned a CVSS score.
How to fix CVE-2025-38657?: To fix CVE-2025-38657, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2025-38657 being actively exploited in the wild?: As for now, there are no information to confirm that CVE-2025-38657 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2025-38657?: CVE-2025-38657 affects Linux Linux, Linux Linux.

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