Security readout for executives and security teams
Plain-English summary
A timing flaw in a Linux DMA driver can start a transfer before its linked-list data is fully written. On systems using the affected DesignWare eDMA HDMA remote setup, this race could corrupt DMA operations and may compromise confidentiality, integrity, or availability. Exploitation requires local access with some privileges; ordinary Linux systems may not use the affected hardware path.
Executive priority
Treat this as a prompt, targeted remediation rather than an internet-wide emergency. First identify systems using the affected DMA path, especially shared or locally accessible infrastructure, then apply supported kernel updates. Potential impact is high, but local access and hardware-path prerequisites reduce broad exposure, and the supplied evidence does not show active exploitation.
Technical view
The dw-edma HDMA remote path can toggle the doorbell before linked-list elements and pointers become fully visible to the controller. The upstream resolution adds a synchronizing memory read before transfer initiation. The supplied CVSS 3.1 score is 7.8, with local, low-complexity, low-privilege exploitation and potentially high impact across confidentiality, integrity, and availability.
Likely exposure
Exposure is limited to Linux systems running an affected kernel and exercising the dw-edma HDMA remote-setup path. The bundle identifies affected releases including 6.5, 6.6.21, 6.7.9, and 6.8, but its version formatting does not establish reliable ranges. Confirm hardware, driver usage, and backported patch status with the distribution or appliance vendor.
Exploitation context
The supplied vector requires local access and low privileges, without user interaction. The bundle marks KEV false and provides no evidence of active exploitation or a public exploit. Practical reachability likely depends on the affected DMA hardware and remote-setup path being present and usable; the sources do not establish how commonly that condition occurs.
Researcher notes
No CWE is assigned in the bundle. The defect is a write-ordering race between linked-list memory and the HDMA doorbell operation; the fix introduces a synchronizing read. Exact vulnerable and fixed version boundaries are unclear from the supplied version data, so commit-level comparison and vendor backport confirmation are more reliable than version-string matching alone.
Mitigation direction
- Apply a vendor-supported kernel containing the applicable upstream stable fix.
- Check distribution or appliance advisories for backported patch status.
- Prioritize systems using dw-edma HDMA remote setup.
- Restrict unnecessary local account access while remediation is pending.
- If patch status remains unclear, obtain explicit guidance from the system vendor.
Validation and detection
- Inventory kernel versions on systems with relevant DMA hardware.
- Determine whether the dw-edma HDMA driver and remote setup are used.
- Compare vendor kernel patches against the three referenced stable commits.
- Confirm the updated kernel is active after maintenance.
- Run representative DMA workloads and standard regression tests after updating.
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
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ATT&CK lookup starting points
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CVE-2024-27409 mapping review
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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/227ef58a9b0c372efba422e8886a8015a1509ebaCVE reference, Linux
- https://git.kernel.org/stable/c/17be6f5cb223f22e4733ed8fe8b2247cbb677716CVE reference, Linux
- https://git.kernel.org/stable/c/712a92a48158e02155b4b6b21e03a817f78c9b7eCVE 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.