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Linux KernelOperating system · Linux

CVE-2026-31768

HIGH · 7.8 CVSS v3.1 Published 2026-05-01
Fix available
A fix is available. Upgrade to 6.1.168 / 6.6.134 or later.
See remediation →
80/100
Remediation priority · High
Zero-click Patch available

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
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.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis

A detailed technical summary for this CVE is being prepared.

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
Linux KernelOperating system
Affected:>= 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

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

dbcve · scoped
Upgrade available Upgrade to 6.1.168 / 6.6.134 / 6.12.81 or later
Fixed in 6.1.1686.6.1346.12.81
Vendor patch git.kernel.org →
Recommended fix High confidence

Upgrade to kernel version 6.1.168 (or later in the 6.1.x branch), 6.6.134 (or later in the 6.6.x branch), 6.12.81 (or later in the 6.12.x branch), or 6.18.22 (or later in the 6.13+ branches)

  1. Obtain the kernel source for your current version
  2. Apply the commit 014c6d27878d3883f7bb065610768fd021de1a96 from the stable kernel tree, or apply the equivalent patch
  3. The patch modifies drivers/iio/adc/ti-adc161s626.c to: allocate a DMA-safe buffer (u8[]) for spi_read() calls instead of using stack memory, and update conversion functions to work with the new buffer type
  4. Rebuild the kernel with the modified driver
  5. Deploy the new kernel and reboot
Caveat Minor: Internal buffer handling changed from __be16/__be32 to u8[] with adjusted conversion functions; should not affect users but verify ADC readings after upgrade

Generated from the published advisory — verify against the referenced sources before acting.

We can perform the upgrade in your staging environment and verify nothing breaks — typical engagement from $1,950. Get the upgrade done

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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2026-31768 in production — separate from our analysis above.

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What this is

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  • Version or environment caveats, and links to real fixes
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