CVE-2022-50732: 
Linux Kernel vulnerability analysis and mitigation

CVE-2022-50732 is a use-after-free vulnerability in the Linux kernel's staging: rtl8192u driver, specifically within the ieee80211_rx() function. The flaw occurs because the skb (socket buffer) pointer is dereferenced after a call to ieee80211_monitor_rx(), which may have already freed the buffer. The vulnerability affects Linux kernel versions starting from commit 8fc8598e61f6f384f3eaf1d9b09500c12af47b37 across multiple stable branches. It was published on December 24, 2025, with patches available for stable series including 4.9, 4.14, 4.19, 5.4, 5.10, 5.15, 6.0, 6.1, and 6.2. No CVSS score has been formally assigned; Feedly estimates the severity as Medium (Feedly, ENISA EUVD).

The root cause is a use-after-free (CWE-416) in the ieee80211_rx() function within the drivers/staging/net/wireless/rtl8192u driver. When ieee80211_monitor_rx() is called, it consumes and frees the skb buffer; however, the calling code in ieee80211_rx() subsequently dereferences the same skb pointer, resulting in access to freed memory. This type of bug can lead to memory corruption depending on heap state at the time of exploitation. The fix ensures the skb pointer is not accessed after ieee80211_monitor_rx() returns (Feedly, Kernel Patch).

Exploitation of this use-after-free vulnerability could result in kernel memory corruption, potentially leading to a system crash (denial of service) or, in more sophisticated scenarios, privilege escalation or arbitrary code execution in kernel context. The affected component is a staging Wi-Fi driver (rtl8192u), so impact is limited to systems with this driver loaded and active. The availability impact (kernel panic/crash) is the most likely consequence, with confidentiality and integrity impacts being theoretically possible but requiring significant exploitation complexity (Feedly).

Patches have been backported to multiple Linux stable kernel branches. Users should update to the following patched versions or later: 4.9.337, 4.14.303, 4.19.270, 5.4.229, 5.10.163, 5.15.86, 6.0.16, 6.1.2, or 6.2+. As a workaround, systems that do not require the rtl8192u staging driver can blacklist or unload the module (modprobe -r rtl8192u) to eliminate the attack surface. SUSE has also issued kernel security advisories addressing this CVE (Feedly, Linux Security SUSE).

SUSE issued multiple kernel security advisories referencing CVE-2022-50732 in 2026, indicating active patching activity within enterprise Linux distributions. No notable researcher commentary or significant social media discussion has been identified for this vulnerability (Linux Security SUSE).