SB20261022440 - Improper Validation of Array Index in Linux kernel mac80211

Description

This security bulletin contains information about 1 vulnerability.

1) Improper Validation of Array Index (CVE-ID: CVE-2026-98824)

CWE-ID: CWE-129 - Improper Validation of Array Index

CVSSv4: 5.8 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N]

The vulnerability allows a local user to corrupt mac80211 state and potentially cause a denial of service.

The vulnerability exists due to improper validation of array indices in the Linux kernel mac80211 minstrel_ht rate-control component when processing driver-reported HT/VHT TX status rate metadata. A local user can supply malformed metadata, if able to influence driver-reported values, to cause out-of-bounds rate-table accesses through unchecked MCS, spatial stream count, or bandwidth values and corrupt mac80211 state.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/6bdcdb31318c10e6369cff8e5b32c37397e98091
• https://git.kernel.org/stable/c/b1961a61ab6fbe11f16f7f9b64c57a9908c6c3a8