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Review reviewHigh

CVE-2026-31768

Linux Linux, SIMATIC S7-1500 CPU 1518-4 PN/DP MFP, SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP

In the Linux kernel, the following vulnerability has been resolved: iio: adc: ti-adc161s626: use DMA-safe memory for spi_read() Add a DMA-safe buffer and use it for spi_read() instead of a stack memory. All SPI buffers must be DMA-safe. Since we only need up to 3 bytes, we just use a u8[] instead of __be16 and __be32 and change the conversion functions appropriately.

CVSS
7.8
EPSS
0.13%
2.95% percentile
CISA KEV
Not listed
Published
2026.05.02
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability0.13%
Technical severityCVSS 7.8

Vulnerability overview

In the Linux kernel, the following vulnerability has been resolved: iio: adc: ti-adc161s626: use DMA-safe memory for spi_read() Add a DMA-safe buffer and use it for spi_read() instead of a stack memory. All SPI buffers must be DMA-safe. Since we only need up to 3 bytes, we just use a u8[] instead of __be16 and __be32 and change the conversion functions appropriately.

Affected product and versions

Product
Linux Linux, SIMATIC S7-1500 CPU 1518-4 PN/DP MFP, SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP
Affected versions
>= 4d671b71beefbfc145b971a11e0c3cabde94b673 < b3bb8faeca1a2ef7be95ee8a512b639f9ffce947, >= 4d671b71beefbfc145b971a11e0c3cabde94b673 < fa64aab25aba47296aa8d12bb4c88ec3fecb2054, >= 4d671b71beefbfc145b971a11e0c3cabde94b673 < 67b3a91bdc48220bfb67155ab528121b9c822782, >= 4d671b71beefbfc145b971a11e0c3cabde94b673 < 014c6d27878d3883f7bb065610768fd021de1a96, >= 4d671b71beefbfc145b971a11e0c3cabde94b673 < d2d031b0786ea66ab0577c9d2d71435068d32199, >= 4d671b71beefbfc145b971a11e0c3cabde94b673 < 768461517a28d80fe81ea4d5d03a90cd184ea6ad, >= 4.9, >= V3.1.6, >= V3.1.5, >= 4.9 < 6.1.168, >= 6.2 < 6.6.134, >= 6.7 < 6.12.81, >= 6.13 < 6.18.22, >= 6.19 < 6.19.12, 7.0
Fixed versions
6.1.168, 6.6.134, 6.12.81, 6.18.22, 6.19.12

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that Linux Linux, SIMATIC S7-1500 CPU 1518-4 PN/DP MFP, SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE
Not available
CVE-2026-31768 — Linux Linux, SIMATIC S7-1500 CPU 1518-4 PN/DP MFP, SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP | SECUFOCUS NOW