CVE-2025-38657: high-severity vulnerability in Linux
wifi: rtw89: mcc: prevent shift wrapping in rtw89_core_mlsr_switch()
Published · Updated
21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 7.3epss 0.1%
exploitation probability
0.1%top 96% of all CVEs
observed exploitation
nono source reports it
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.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:H
Affected products
Linux · LinuxRelated CVEs — Linux
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