Rapid7

vulnerability

Oracle Linux: CVE-2020-26146: ELSA-2021-4356: kernel security, bug fix, and enhancement update (MODERATE) (Multiple Advisories)

Severity
3
CVSS
(AV:A/AC:M/Au:N/C:N/I:P/A:N)
Published
May 11, 2021
Added
Sep 23, 2021
Modified
Dec 3, 2025

Description

An issue was discovered on Samsung Galaxy S3 i9305 4.4.4 devices. The WPA, WPA2, and WPA3 implementations reassemble fragments with non-consecutive packet numbers. An adversary can abuse this to exfiltrate selected fragments. This vulnerability is exploitable when another device sends fragmented frames and the WEP, CCMP, or GCMP data-confidentiality protocol is used. Note that WEP is vulnerable to this attack by design.
A vulnerability was found in Linux kernel, where the WiFi implementation reassemble fragments with non-consecutive packet numbers. An adversary can abuse this to exfiltrate selected fragments. This vulnerability is exploitable when another device sends fragmented frames and the WEP, CCMP, or GCMP data-confidentiality protocol is used. Note that WEP is vulnerable to this attack by design.

Solutions

oracle-linux-upgrade-kerneloracle-linux-upgrade-kernel-uek
Title
Rapid7 Labs

2026 Global Threat Landscape Report

The predictive window has collapsed. Exploitation follows disclosure in days. See how attackers are accelerating and how to stay ahead.