Security readout for executives and security teams
Plain-English summary
This is a Linux kernel driver cleanup flaw in Qualcomm QMP PHY handling. If device probing fails late, such as during probe deferral, the driver may leak a lane reset controller reference. The available sources do not show active exploitation, CVSS scoring, or broad business impact details.
Executive priority
Treat this as routine kernel maintenance unless affected Qualcomm-based devices show stability problems. There is no cited active exploitation or severity score, but kernel fixes should be folded into normal patch cycles.
Technical view
The qcom-qmp PHY driver failed to release the lane reset controller on late probe errors. The fix explicitly releases that controller because the reset controller is defined under devicetree lane child nodes and cannot use devm_reset_control_get_exclusive() directly.
Likely exposure
Exposure appears limited to Linux systems using the Qualcomm QMP PHY driver, especially Qualcomm-based platforms where probe errors or deferrals occur. The source lists Linux as affected and names several kernel version lines, but provides no CPEs or product-specific distribution mapping.
Exploitation context
No KEV listing is present, and the provided sources do not claim active exploitation. The described trigger is a driver probe error path, not a documented remote attack path. Impact evidence is incomplete beyond a reset-controller resource leak.
Researcher notes
Focus validation on the qcom-qmp probe error path and reset controller lifecycle. The evidence supports a leak on late probe failure, but does not provide exploit primitives, attacker requirements, or distribution-specific affected package versions.
Mitigation direction
- Update to a kernel containing the referenced stable qcom-qmp fix.
- Check Linux distribution or device vendor advisories for backported fixes.
- Prioritize Qualcomm-based devices using the qcom-qmp PHY driver.
- Review vendor guidance before applying unsupported kernel changes.
Validation and detection
- Inventory Linux kernel versions on Qualcomm-based systems.
- Confirm whether the qcom-qmp PHY driver is present and enabled.
- Check whether vendor kernels include one of the referenced fixes or a backport.
- Review boot and kernel logs for qcom-qmp probe deferral or probe failures.
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-2022-49396 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.
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/b7b5fbcaac5355e2e695dc0c08a0fcf248250388CVE reference, Linux
- https://git.kernel.org/stable/c/a39d9eccb333b8c07c43ebea1c6dfda122378a0fCVE reference, Linux
- https://git.kernel.org/stable/c/7ac21b24af859c097eb4034e93430056068f8f31CVE reference, Linux
- https://git.kernel.org/stable/c/2156dc390402043ba5982489c6625adcb0b0975cCVE reference, Linux
- https://git.kernel.org/stable/c/ba173a6f8d8dffed64bb13ab23081bdddfb464f0CVE reference, Linux
- https://git.kernel.org/stable/c/feb05b10b3ed3ae21b851520a0d0b71685439517CVE reference, Linux
- https://git.kernel.org/stable/c/8c03eb0c8982677b4e17174073a011788891304dCVE reference, Linux
- https://git.kernel.org/stable/c/4d2900f20edfe541f75756a00deeb2ffe7c66bc1CVE 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.