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CVE-2026-31732 medium CVSS 5.5

Vulnerability in Linux kernel (CVE-2026-31732)

Summary

Vulnerability in Linux kernel (CVE-2026-31732). Risk of unauthorized operations or information disclosure. Exploitable via gdev.

Original description

The description as published by the source.

In the Linux kernel, the following vulnerability has been resolved:

gpio: Fix resource leaks on errors in gpiochip_add_data_with_key()

Since commit aab5c6f20023 ("gpio: set device type for GPIO chips"),
gdev->dev.release is unset. As a result, the reference count to
gdev->dev isn't dropped on the error handling paths.

Drop the reference on errors.

Also reorder the instructions to make the error handling simpler.
Now gpiochip_add_data_with_key() roughly looks like:

Some memory allocation. Go to ERR ZONE 1 on errors.
device_initialize().

gpiodev_release() takes over the responsibility for freeing the
resources of gdev->dev. The subsequent error handling paths
shouldn't go through ERR ZONE 1 again which leads to double free.

Some initialization mainly on gdev.
The rest of initialization. Go to ERR ZONE 2 on errors.
Chip registration success and exit.

ERR ZONE 2. gpio_device_put() and exit.
ERR ZONE 1.

Source: GitHub Security Advisories (Global) NVD GitHub Advisory

Auto-generated summary

Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.

A vulnerability tracked as CVE-2026-31732 has been found in Linux kernel.
Attackers can target a specific entry point like gdev over the network to misuse the product.
Risk of unauthorized operations or information disclosure. CVSS score: 5.5/10.
What to do: apply the vendor's official patched release.
If unsure, ask your IT team or search "Linux kernel CVE-2026-31732" on the vendor's site.

CVE-2026-31732 (Linux kernel) — CWE-401 / CVSS v3 5.5
Attack vector: local / no user interaction
Attack surface: gdev
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.

❓ What is the problem

A vulnerability (CWE-401) exists in Linux kernel. Attackers reach the vulnerable code path via gdev.

📍 Affected scope

Check the vendor advisory for the affected versions of Linux kernel. Attack surface: gdev.

🔥 Severity

Severity: Medium (CVSS 5.5/10). Risk of unauthorized operations or information disclosure.

🔧 How to fix

Update to the patched release per vendor advisory.

🛡️ Workaround

Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.

🔍 Detection

Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Audit SBOM/dependencies to find affected services.

Response actions

Concrete steps and command examples for SOC/SRE teams to execute in order

  1. 1
    Identify exposure identify 
    Audit SBOM/dependencies for affected components.

    資産台帳・SBOM・依存マニフェストで Linux kernel を使っているサービスとバージョンを洗い出す。

  2. 2
    Post-deployment verification verify 
    Confirm patched version is live in production

    パッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。

Affected packages

Linux Kernel
[{"type":"ECOSYSTEM","events":[{"introduced":"6.9.0"},{"fixed":"6.12.95"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.22"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"6.19.12"}]}]

Fix status by distribution

Fixed packages published by each distribution for this CVE

References

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