Security readout for executives and security teams
Plain-English summary
This is a Linux kernel availability bug in the UniPhier reset glue driver. A local user could trigger a kernel null pointer dereference under affected conditions, causing a crash or denial of service. The sources do not indicate data theft, privilege escalation, remote attack, or active exploitation.
Executive priority
Treat as a targeted medium-priority Linux stability issue. It is not described as remote code execution, but affected shared or embedded systems could be crashed by a local low-privilege user, creating operational disruption.
Technical view
CVE-2022-49758 is CWE-476 in Linux reset: uniphier-glue. If platform_get_resource() returns NULL, resource_size(res) can dereference NULL. CVSS 3.1 is 5.5: local, low complexity, low privilege, no user interaction, availability impact only. Kernel stable commits are listed as fixes.
Likely exposure
Exposure is most likely on Linux systems running affected kernel builds where the UniPhier glue reset driver is present or enabled. Generic Linux estates should verify actual kernel configuration and vendor backports rather than assuming every Linux host is vulnerable.
Exploitation context
The bundle reports no CISA KEV listing and provides no evidence of active exploitation. The CVSS vector requires local access with low privileges and targets availability, so urgency is highest for shared, embedded, or appliance-like systems where local users can trigger kernel code paths.
Researcher notes
The core flaw is a missing NULL check after platform_get_resource() before calling resource_size(). The provided affected-version data is limited and should be reconciled against kernel vendor advisories, source package changelogs, and the referenced stable commits.
Mitigation direction
- Apply vendor kernel updates that include the listed stable fixes.
- Prioritize systems using UniPhier-related kernel drivers or embedded Linux builds.
- Check distribution advisories for backported fixes before relying on version numbers.
- Limit local shell access on affected systems until patched.
Validation and detection
- Inventory Linux kernel versions across the environment.
- Check whether the uniphier-glue reset driver is built or loaded.
- Confirm vendor packages include one of the referenced stable fixes or equivalent backport.
- Record systems still on affected or uncertain kernel builds for remediation tracking.
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.
CWE-476: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2022-49758 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
- Medium
- CVSS
- 5.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
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.
SSVC decision data
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H1.83.6CISA-ADPVulnerability scoring details
Base CVSS 3.1 score
5.5MediumVector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
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.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- https://git.kernel.org/stable/c/95de286200b2a046da01c4aeba02ae9220d68ca4CVE reference, Linux
- https://git.kernel.org/stable/c/633bad3dc81ce2aa561f704ec091e49eb647bd0bCVE reference, Linux
- https://git.kernel.org/stable/c/3a2390c6777e3f6662980c6cfc25cafe9e4fef98CVE 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.
NULL Pointer Dereference
NULL Pointer Dereference represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.