Security readout for executives and security teams
Plain-English summary
CVE-2022-49460 is a Linux kernel bug in the Rockchip RK3399 devfreq memory-controller driver. The source shows a warning triggered when unbinding the DFI device because an event device was not disabled during removal. No source in the bundle shows active exploitation, privilege escalation, data theft, or remote attack impact.
Executive priority
Treat this as a targeted kernel maintenance item, not an emergency, unless your fleet includes RK3399-based devices or custom kernels. Prioritize inventory and patch confirmation because the public data lacks severity scoring and exploit evidence.
Technical view
The fix changes the rk3399_dmc devfreq driver to disable the devfreq event device during remove(). Without that cleanup, unbinding the DFI device can leave an unbalanced enable count and trigger a kernel warning in devfreq_event_remove_edev(). Evidence is limited to Linux kernel CVE data and stable commit references.
Likely exposure
Exposure appears limited to Linux systems using the Rockchip RK3399 DMC/devfreq path, such as RK3399-based devices. Generic Linux servers without this hardware/driver path are unlikely to be exposed based on the provided sources.
Exploitation context
The bundle marks KEV as false and provides no cited evidence of exploitation in the wild. The described trigger is device unbinding and cleanup behavior, not a documented remote or unauthenticated attack path.
Researcher notes
Do not generalize this across all Linux deployments. The provided trace points to a lifecycle cleanup bug in drivers/devfreq/rk3399_dmc around DFI device unbinding. Impact, exploitability, and attacker prerequisites are not established in the source bundle.
Mitigation direction
- Identify RK3399-based Linux devices and kernel versions in use.
- Apply a vendor kernel update containing the referenced stable fix.
- For custom kernels, review whether the stable commit was backported.
- Follow Linux distribution or device-vendor advisories for supported packages.
- Avoid ad hoc driver unbinding on production devices unless operationally required.
Validation and detection
- Check whether affected assets use Rockchip RK3399 hardware.
- Confirm the running kernel includes the rk3399_dmc remove() fix.
- Review kernel logs for devfreq_event_remove_edev warnings during driver unbind tests.
- Map deployed versions against vendor fixed kernel packages.
- Document any unsupported custom kernels needing backport review.
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
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CVE-2022-49460 mapping review
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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.
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
Source materials
- CVE List V5 sourceCVE List V5
- https://git.kernel.org/stable/c/664736e2cc09e504ce58ec61164d029d1f2651bbCVE reference, Linux
- https://git.kernel.org/stable/c/a0180e324a9a63de8f770da300477b48cb4a53f1CVE reference, Linux
- https://git.kernel.org/stable/c/86b091b6894c449d2734de7aa7d79ccb33ffd97dCVE reference, Linux
- https://git.kernel.org/stable/c/cb1be1d4be18fe286ba5a67d928598378fd7fbe5CVE reference, Linux
- https://git.kernel.org/stable/c/fb089b6f21de03a685dd31df3789bbb01c59f8e3CVE reference, Linux
- https://git.kernel.org/stable/c/a9c2b23a7ac6ab19214cad8cac8af8608a4d9cefCVE reference, Linux
- https://git.kernel.org/stable/c/2fccf9e6050e0e3b8b4cd275d41daf7f7fa22804CVE reference, Linux
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.