CVE-2026-98829
kernel: wifi: mac80211: drop oversized fragments to avoid extra_len overflow
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · October 18, 2026
Updated · October 24, 2026
Description
A flaw was found in the mac80211 wireless networking subsystem of the Linux kernel. An adjacent attacker, such as a rogue Wi-Fi access point or nearby malicious device, can cause a Denial of Service (DoS) by transmitting a sequence of oversized wireless frame fragments. This causes an integer overflow during frame reassembly, leading to an undersized buffer allocation and an immediate system crash.
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 · 6.5CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE-190 · Integer Overflow or Wraparound