Security readout for executives and security teams
Plain-English summary
This is a Linux kernel bug in the NVIDIA Tegra host1x GPU driver. A regression caused an uninitialized mutex to be used, which can disrupt system availability on affected systems. The issue is most relevant to Tegra or Jetson environments, not general web-facing services.
Executive priority
Treat this as a targeted availability risk for affected Linux GPU platforms. It should be patched through normal kernel maintenance, with higher priority for production Tegra or Jetson devices that support business operations.
Technical view
The vulnerability is CWE-908 in the Linux kernel host1x driver. Commit c8347f915e67 introduced a path where host1x interrupt/runtime resume logic can lock an uninitialized mutex. The CVSS vector is local, low complexity, low privilege, no user interaction, with high availability impact.
Likely exposure
Exposure is likely limited to Linux systems using the affected host1x GPU driver, especially NVIDIA Tegra or Jetson platforms. Fleets without this hardware, driver, or affected kernel lineage are less likely exposed based on the provided evidence.
Exploitation context
No active exploitation is indicated by the provided sources, and KEV status is false. The CVSS vector requires local access and low privileges. The evidence describes a kernel warning and availability impact, not remote code execution or data compromise.
Researcher notes
The source bundle identifies the flaw as a resolved Linux kernel regression with CVSS 5.5. Public evidence is limited to the CVE text and stable kernel commit references. No exploit status, workaround, or broad affected product list is provided.
Mitigation direction
- Identify systems running affected Linux kernel versions with host1x enabled.
- Review vendor or distribution advisories for fixed kernel packages.
- Prioritize kernel updates for Tegra or Jetson production systems.
- Use referenced stable kernel commits to confirm backport status.
- Limit local access on exposed affected devices where practical.
Validation and detection
- Check kernel version and downstream patch level on Tegra or Jetson systems.
- Confirm whether the host1x driver is present and loaded.
- Compare deployed kernels against vendor fixes and stable commit references.
- Review boot and kernel logs for host1x mutex or lock warnings.
- Track remediation through normal kernel update evidence.
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-908: 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-2025-21824 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/396d8e5136b4476672bc15b83ba312486bb4bf76CVE reference, Linux
- https://git.kernel.org/stable/c/127e91638ddcd02b80de92fec2240609a9f90426CVE reference, Linux
- https://git.kernel.org/stable/c/02458fbfaa0170aabf8506f7d4ed054f02414251CVE 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.
Use of Uninitialized Resource
Use of Uninitialized Resource represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.