Security readout for executives and security teams
Plain-English summary
A timing flaw in Linux’s DesignWare eDMA driver can start a remote DMA transfer before its linked-list data is fully written. This race may corrupt transfer behavior. The supplied CVSS assessment rates potential confidentiality, integrity, and availability impact as high, but exposure requires the affected driver and remote setup.
Executive priority
Treat as a high-priority, targeted kernel remediation rather than an estate-wide emergency. Quickly identify systems using the affected eDMA path, then patch confirmed exposures through supported vendor updates. The absence of supplied exploitation evidence lowers immediate crisis urgency, but the assessed impact warrants prompt action where exposure exists.
Technical view
The dw-edma remote path could toggle the doorbell register before linked-list elements and pointers became fully visible to the controller. The referenced fixes add a synchronization read before transfer startup, ensuring preceding writes complete. CVSS 3.1 is 7.8: local access, low complexity, low privileges, no user interaction, and high impacts across confidentiality, integrity, and availability.
Likely exposure
Systems are candidates only when running an affected Linux kernel and using dw-edma in remote setup; Linux presence alone is insufficient. The bundle lists affected entries involving 5.3 and 6.6–6.8 releases, but its version representation is ambiguous. Confirm exact exposure through the relevant distribution or appliance vendor.
Exploitation context
The supplied record does not identify public exploitation, and CVE-2024-27408 is not listed as KEV in the bundle. Its CVSS vector describes a local, low-privilege attack surface. No evidence supplied establishes practical exploitability on a specific platform, so do not treat the score alone as proof of compromise.
Researcher notes
The defect is a write-ordering race across linked-list memory and the controller doorbell. The corrective pattern is a readl synchronization read before starting remote DMA. The bundle provides three stable-tree commits but no authoritative mapping from each commit to every affected or fixed release, limiting precise package-level conclusions.
Mitigation direction
- Upgrade to a vendor-supported kernel containing the applicable referenced stable fix.
- Check distribution or appliance guidance for exact fixed package versions and reboot requirements.
- Restrict untrusted local access while remediation is pending.
- Prioritize systems confirmed to use dw-edma remote mode.
Validation and detection
- Inventory kernel versions on systems with DesignWare eDMA-capable hardware.
- Confirm whether the dw-edma driver and remote setup are actually used.
- Check vendor changelogs or kernel source for an applicable referenced fix commit.
- After updating, verify the fixed kernel is running and the workload operates normally.
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-2024-27408 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/d24fe6d5a1cfdddb7a9ef56736ec501c4d0a5fd3CVE reference, Linux
- https://git.kernel.org/stable/c/f396b4df27cfe01a99f4b41f584c49e56477be3aCVE reference, Linux
- https://git.kernel.org/stable/c/bbcc1c83f343e580c3aa1f2a8593343bf7b55bbaCVE 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.