Security readout for executives and security teams
Plain-English summary
A Linux driver for the TI ADC161S626 analog-to-digital converter used stack memory for an SPI transfer, although SPI buffers must support DMA safely. On affected systems, this could compromise confidentiality, integrity, and availability. Exposure is hardware- and driver-dependent, so ordinary Linux installations may not be affected.
Executive priority
Prioritize targeted identification and patching of embedded, industrial, or specialized Linux systems using this driver. Treat confirmed exposure as high priority because the supplied CVSS indicates possible complete confidentiality, integrity, and availability impact. Broad emergency action across every Linux host is not supported by the evidence.
Technical view
The ti-adc161s626 IIO driver passed a stack-backed buffer to spi_read(). The resolved implementation adds a DMA-safe byte buffer and adjusts value conversion. CVSS 3.1 rates the issue 7.8: local access, low complexity, low privileges, no user interaction, unchanged scope, and high confidentiality, integrity, and availability impacts.
Likely exposure
Likely exposure is limited to affected Linux kernels where the ti-adc161s626 driver is present and used with relevant SPI-connected hardware. The supplied version data is not sufficiently clear to state exact vulnerable ranges confidently. Two Siemens advisories are referenced, so organizations using Siemens products should review those notices for product-specific applicability.
Exploitation context
The supplied record does not identify public exploitation, and the CVE is not listed as KEV. The CVSS vector describes a local, low-privilege attack path rather than remote exploitation. No exploit prerequisites beyond that scoring information are established by the provided sources.
Researcher notes
The core defect is an SPI DMA-safety contract violation involving stack memory. Multiple Linux stable commits are supplied, indicating backports across maintained branches, but their exact release mapping is not explained in the bundle. The record provides neither a CWE nor evidence of exploitation, trigger conditions, demonstrated impact, or exploitability across particular SPI controllers.
Mitigation direction
- Update to a vendor-supported kernel containing the referenced DMA-safe buffer correction.
- Review Linux distribution and appliance vendor advisories for exact fixed package versions.
- Assess both referenced Siemens advisories if Siemens products are deployed.
- Restrict local access to potentially affected systems until updates are validated.
Validation and detection
- Inventory kernel versions and systems using the ti-adc161s626 driver.
- Confirm whether relevant TI ADC161S626 SPI hardware is configured or operational.
- Verify the installed kernel includes the applicable referenced stable fix.
- Check vendor advisories because the supplied affected-version list is ambiguous.
- After updating, confirm normal ADC operation and review kernel logs for SPI or DMA errors.
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-2026-31768 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.
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/b3bb8faeca1a2ef7be95ee8a512b639f9ffce947CVE reference, Linux
- https://git.kernel.org/stable/c/fa64aab25aba47296aa8d12bb4c88ec3fecb2054CVE reference, Linux
- https://git.kernel.org/stable/c/67b3a91bdc48220bfb67155ab528121b9c822782CVE reference, Linux
- https://git.kernel.org/stable/c/014c6d27878d3883f7bb065610768fd021de1a96CVE reference, Linux
- https://git.kernel.org/stable/c/d2d031b0786ea66ab0577c9d2d71435068d32199CVE reference, Linux
- https://git.kernel.org/stable/c/768461517a28d80fe81ea4d5d03a90cd184ea6adCVE reference, Linux
- https://cert-portal.siemens.com/productcert/html/ssa-082556.htmlCVE reference, siemens-SADP
- https://cert-portal.siemens.com/productcert/html/ssa-019113.htmlCVE reference, siemens-SADP
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.