Security readout for executives and security teams
Plain-English summary
A local user may trigger a timing flaw in the Linux AMD GPU compute driver, causing the kernel to access a cleared pointer. The supplied CVSS rating indicates possible loss of confidentiality, integrity, and availability, but the bundle provides no evidence of active exploitation.
Executive priority
Treat as a high-priority kernel update for exposed AMD GPU compute and shared Linux systems. Broader urgency is lower where amdkfd is absent or local access is tightly controlled. Confirm scope promptly because the supplied version data is ambiguous.
Technical view
The amdkfd debug-trap path can queue dbg_ev_file work from interrupt context. If debug trapping is disabled before that work executes, dbg_ev_file may already be NULL, causing a NULL-pointer access. The referenced correction cancels debug_event_workarea before clearing the pointer.
Likely exposure
Exposure is most plausible on Linux systems using the AMD KFD driver and affected kernel builds where local, low-privileged users can reach the debug-trap functionality. The bundle lists versions including 6.5, 6.6.50, 6.10.9, and 6.11, but provides insufficient range semantics; confirm distribution backports.
Exploitation context
The CVSS vector describes local access, low complexity, low privileges, and no user interaction. This CVE is not identified as KEV in the supplied bundle, and no cited source establishes active exploitation or a public exploit.
Researcher notes
This appears to be a work-queue race in the debug-trap teardown path: deferred debug-event work can outlive debug_trap_disable and dereference dbg_ev_file after it becomes NULL. The stated v2 correction cancels debug_event_workarea before clearing the pointer. The bundle does not identify a CWE or demonstrate exploitability beyond the CVSS assessment.
Mitigation direction
- Update to a vendor-supported kernel containing the referenced stable fix.
- Check distribution advisories for backported fixes and exact affected package versions.
- Prioritize multi-user AMD GPU compute hosts where untrusted local accounts exist.
- Restrict unnecessary local access until remediation is confirmed.
Validation and detection
- Inventory kernel builds on systems using AMD KFD or AMD GPU compute workloads.
- Compare distribution kernel packages against vendor advisories and referenced fix commits.
- Confirm the replacement kernel is active after updating and rebooting.
- Review kernel logs for related amdkfd NULL-pointer faults or unexpected crashes.
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-2024-46803 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
- High
- CVSS
- 7.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/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:H/I:H/A:H1.85.9LinuxVulnerability scoring details
Base CVSS 3.1 score
7.8HighVector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/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/e6ea3b8fe398915338147fe54dd2db8155fdafd8CVE reference, Linux
- https://git.kernel.org/stable/c/820dcbd38a77bd5fdc4236d521c1c122841227d0CVE reference, Linux
- https://git.kernel.org/stable/c/547033b593063eb85bfdf9b25a5f1b8fd1911be2CVE 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.