Security readout for executives and security teams
Plain-English summary
This is a Linux kernel memory leak in the hi846 media driver. If a local, low-privileged user can trigger the affected failure path, kernel memory may be consumed and system availability can be affected. The sources do not indicate data theft, integrity impact, remote exploitation, or active exploitation.
Executive priority
Treat as a moderate availability risk. Patch during the normal kernel maintenance cycle, with higher priority for shared systems, embedded devices, or workstations where untrusted local users can interact with media hardware. No source provided evidence of active exploitation or remote compromise.
Technical view
hi846_init_controls() allocated a V4L2 control handler but did not free it on initialization failure, causing a CWE-401 memory leak. The upstream fix adds v4l2_ctrl_handler_free() to the failure path. CVSS 3.1 is 5.5: local attack vector, low complexity, low privileges, no user interaction, availability impact only.
Likely exposure
Exposure is most likely on Linux systems running affected kernel versions where the hi846 media driver is present or enabled. General server fleets may have limited exposure if this driver is not built, loaded, or reachable. Confirm against vendor kernel packages, because distribution backports may differ from upstream version numbers.
Exploitation context
The CVE record marks KEV as false, and the provided sources do not show active exploitation. The CVSS vector indicates exploitation requires local low-privileged access and targets availability, not confidentiality or integrity. Evidence does not support treating this as remotely exploitable.
Researcher notes
The key condition is the error path in hi846_init_controls(). Validation should focus on affected kernel lineage, driver availability, and whether vendor kernels already carry the stable fix. The source bundle provides patch references but not exploit reports, affected distribution packages, or operational indicators.
Mitigation direction
- Update to a vendor kernel containing the referenced stable fixes.
- Check Linux distribution advisories for backported fixes.
- Prioritize systems where the hi846 media driver is enabled.
- Limit local untrusted access on exposed affected systems.
- Avoid manual patch assumptions unless vendor guidance confirms coverage.
Validation and detection
- Inventory running kernel versions across affected assets.
- Check whether the hi846 driver is built, loaded, or packaged.
- Map installed kernels to vendor fixed builds or stable commits.
- Review logs for repeated media driver initialization failures.
- Confirm regression testing after kernel updates.
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-401: 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-2023-53300 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/fd22e8c8c38fb40f130d3a60e52c59996a5bbae9CVE reference, Linux
- https://git.kernel.org/stable/c/12a80b1490e398f5ad7157508cf32b73511de5fcCVE reference, Linux
- https://git.kernel.org/stable/c/07f0f15e5db60c5b0722049d3251ef4a46dc3b76CVE reference, Linux
- https://git.kernel.org/stable/c/2649c1a20e8e399ee955d0e22192f9992662c3d2CVE 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.
Missing Release of Memory after Effective Lifetime
Missing Release of Memory after Effective Lifetime represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.