Security readout for executives and security teams
Plain-English summary
This CVE is a Linux kernel memory leak in the RISC-V kexec path. When a replacement kernel is loaded, reloaded, or unloaded, a device-tree buffer may not be freed. The sources do not report remote attack, data theft, or active exploitation. Business urgency depends on whether you run RISC-V Linux systems using kexec.
Executive priority
Treat as a targeted kernel maintenance item, not an emergency internet-facing threat based on current sources. Prioritize if your organization operates RISC-V Linux platforms or depends on kexec-based reboot, crash, or upgrade processes.
Technical view
In RISC-V Linux, elf_kexec_load() allocates an FDT buffer via kvmalloc() through of_kexec_alloc_and_setup_fdt(). The buffer was not released during kexec reload or unload. The kernel fix adds a RISC-V arch_kimage_file_post_load_cleanup() path to free the buffer.
Likely exposure
Exposure appears limited to Linux on RISC-V systems where kexec file loading is used. The CVE record lists Linux kernel versions including 5.19, 6.0.18, 6.1.4, and 6.2 as affected, but distribution backport status must be verified with vendor advisories.
Exploitation context
No source in the bundle reports active exploitation, public weaponization, or KEV listing. The described impact is memory leakage during kexec kernel load, reload, or unload operations. Practical impact is most relevant where those operations occur repeatedly or are part of operational workflows.
Researcher notes
The record is narrow and source evidence is concise. It identifies a kmemleak-reported FDT buffer leak and three upstream stable commit references. No CVSS, CWE, exploitability assessment, or downstream distro status is provided in the bundle.
Mitigation direction
- Check your Linux vendor advisory for CVE-2022-50631 package status.
- Apply kernel updates containing the referenced upstream stable fixes.
- Prioritize RISC-V systems that use kexec for boot, crash, or upgrade workflows.
- If unpatched, reduce unnecessary repeated kexec load/reload/unload operations where operationally feasible.
Validation and detection
- Inventory RISC-V Linux hosts and running kernel versions.
- Determine whether kexec file loading is enabled or operationally used.
- Compare installed kernel changelogs against the referenced stable commits.
- Review kernel memory-leak diagnostics after approved kexec workflows.
- Confirm distribution packages include the RISC-V FDT cleanup fix.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CVE-2022-50631 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.