CVE-2022-50030: 
Linux Kernel vulnerability analysis and mitigation

CVE-2022-50030 is a buffer overflow vulnerability in the Linux kernel's scsi: lpfc driver that allows a local attacker with low privileges to trigger crashes via malformed input to debugfs. The flaw exists because input string lengths were not properly constrained to fit within internal buffers, leaving no space for NULL terminators. It affects Linux kernel versions before 5.4.211, 5.5 through 5.10.138, 5.11 through 5.15.63, and 5.16 through 5.19.4. The CVE was published on June 18, 2025, and carries a CVSS v3.1 base score of 7.8 (High) (Feedly, git.kernel.org).

The root cause is an out-of-bounds write (CWE-787) in the lpfc SCSI driver's debugfs interface within the Linux kernel. When a local user writes malformed or oversized input to the debugfs interface exposed by the lpfc driver, the kernel fails to enforce proper length limits on input strings before copying them into fixed-size internal buffers, resulting in a buffer overflow that can crash the system. Exploitation requires local access and low privileges (e.g., write access to the relevant debugfs file), but no user interaction is needed. The fix adapts input string lengths to fit within internal buffers and ensures NULL terminators are preserved (Feedly, git.kernel.org).

Successful exploitation can result in high impact to confidentiality, integrity, and availability of the affected system, as reflected in the CVSS score. An attacker with local access can crash the kernel (denial of service) and may potentially leverage the out-of-bounds write for privilege escalation or arbitrary code execution in kernel context. The scope is limited to the local system, but kernel-level compromise could enable full system takeover and lateral movement within a shared or multi-tenant environment (Feedly).

No public proof-of-concept exploit code or in-the-wild exploitation has been reported for CVE-2022-50030. The EPSS score is very low at approximately 0.018%, indicating a low probability of exploitation in the near term. The vulnerability is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog. Detection plugins are available from Qualys (IDs: 759028, 360909, 760415) and Nessus (ID: 252257) (Feedly).

The vulnerability is patched in Linux kernel versions 5.4.211, 5.10.138, 5.15.63, and 5.19.4. Administrators should update to a fixed kernel version as soon as possible. As a temporary workaround, restricting access to the debugfs filesystem (e.g., by mounting with nodev or limiting access via filesystem permissions) can reduce exposure for systems where debugfs is not required. SUSE has released updated kernel packages addressing this issue (SUSE Advisory, git.kernel.org).

SUSE has issued multiple kernel security advisories addressing CVE-2022-50030 as part of broader Linux kernel update batches. Amazon Linux 2 has also released a security advisory (ALAS2-2025-2988) covering this vulnerability. No notable independent researcher commentary or significant social media discussion has been identified for this CVE (SUSE Advisory, Amazon Advisory).