CVE-2022-48790
A critical use‑after‑free bug in the Linux NVMe driver can let an attacker crash or potentially take control of the system. The flaw occurs when a controller reset happens while an asynchronous event is being processed, allowing a race that frees memory that is still in use. The kernel has been patched to check the controller state before submitting asynchronous events.
An official fix is available, so this entry is kept for 30 days and then removed automatically.
Who is affected
Linux kernel (all versions before the patch) – any system using the NVMe driver, including NVMe over TCP.
Real-world impact
An attacker could cause a crash or potentially execute arbitrary code by triggering the race during a controller reset, leading to denial of service or privilege escalation.
Why this severity
The CVSS score of 9.8 reflects the lack of authentication or user interaction required, the high impact on confidentiality, integrity, and availability, and the presence of a race condition that can be exploited remotely.
What to do about it
- 01Update the Linux kernel to a version that includes the nvme use‑after‑free fix.
- 02Reboot the system to load the new kernel.
NVD description
Timeline
- Jul 16, 2024 · Jul 16, 2024PublishedDisclosed and added to the National Vulnerability Database.
- Aug 4, 2026 · 2d agoAdvisory updatedThe NVD record was last revised.
- Aug 5, 2026 · 1d agoOfficial fix availableA vendor patch or mitigation now exists — see the remediation steps above.