CVE-2026-31576

Memory corruption via probe error race

Published Apr 24, 2026 · Updated Apr 24, 2026

Use-after-free in the Linux Kernel HackRF driver allows local users to trigger kernel memory misuse during a failed device probe. The hackrf_probe() error path unregisters an exposed V4L2 device and directly frees hackrf_dev while open descriptors can still reach ioctl and release handlers. Triggering that path requires root or CAP_SYS_ADMIN access to the USB driver's sysfs unbind/bind interface, and the race can cause stale kernel-memory access or a double free.

CVSS severity7.8
High
EPSS probability0.13%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in the Linux Kernel HackRF driver allows local users to trigger kernel memory misuse during a failed device probe. The hackrf_probe() error path unregisters an exposed V4L2 device and directly frees hackrf_dev while open descriptors can still reach ioctl and release handlers. Triggering that path requires root or CAP_SYS_ADMIN access to the USB driver's sysfs unbind/bind interface, and the race can cause stale kernel-memory access or a double free.

The record

CVE
CVE-2026-31576
Published
Apr 24, 2026
Updated
Apr 24, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-416
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Apr 24, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 24, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <07e9e674b6146b1f6fc41b1f54b8968bf2802824
  2. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <2145c71a8044362e82e9923f001ba2aeb771b848
  3. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <98a0a81ce78020c2522e0046f49d200de9778cb9
  4. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <fcd1d70792a35c8a97414fe429f48311e41269c2

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

The Linux Kernel Organization · Linux Kernelversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <07e9e674b6146b1f6fc41b1f54b8968bf2802824; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <2145c71a8044362e82e9923f001ba2aeb771b848; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <98a0a81ce78020c2522e0046f49d200de9778cb9; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <fcd1d70792a35c8a97414fe429f48311e41269c2

Published CVSS scores

7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-416Use After Free

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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