CVE-2026-98887
kernel: wifi: mac80211_hwsim: reject undersized HWSIM_ATTR_TX_INFO
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · October 23, 2026
Updated · October 26, 2026
Description
A flaw was found in the Linux kernel's mac80211_hwsim wireless driver. By submitting a specially crafted, undersized Netlink message, a local user can trigger an out-of-bounds memory read due to improper message length validation. This flaw primarily allows an attacker to cause a kernel crash leading to a Denial of Service (DoS), or potentially expose sensitive kernel memory.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 3.1 · 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE-125 · Out-of-bounds Read