CVE-2024-39495

Freed-memory access via Greybus mode-switch race

Published Jul 12, 2024 · Updated Aug 5, 2026

Use-after-free in the Greybus interface of affected Linux kernels allows local users to trigger freed-memory access through a race. gb_interface_release frees the interface object without first canceling queued mode-switch work, which later locks a mutex through the freed object. A low-privileged local context is required; published records do not identify a demonstrated crash, privilege gain, or data exposure.

CVSS severity7.8
High
EPSS probability0.33%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

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Summary

What happened

Use-after-free in the Greybus interface of affected Linux kernels allows local users to trigger freed-memory access through a race. gb_interface_release frees the interface object without first canceling queued mode-switch work, which later locks a mutex through the freed object. A low-privileged local context is required; published records do not identify a demonstrated crash, privilege gain, or data exposure.

The record

CVE
CVE-2024-39495
Published
Jul 12, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-416
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 12, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=4.9
  2. Affected versionversion=55742d2a071a569bf20f90d37b1b5b8a25a3f882 <03ea2b129344152157418929f06726989efc0445
  3. Affected versionversion=55742d2a071a569bf20f90d37b1b5b8a25a3f882 <0b8fba38bdfb848fac52e71270b2aa3538c996ea
  4. Affected versionversion=55742d2a071a569bf20f90d37b1b5b8a25a3f882 <2b6bb0b4abfd79b8698ee161bb73c0936a2aaf83
  5. Affected versionversion=55742d2a071a569bf20f90d37b1b5b8a25a3f882 <5c9c5d7f26acc2c669c1dcf57d1bb43ee99220ce
  6. Affected versionversion=55742d2a071a569bf20f90d37b1b5b8a25a3f882 <74cd0a421896b2e07eafe7da4275302bfecef201
  7. Affected versionversion=55742d2a071a569bf20f90d37b1b5b8a25a3f882 <9a733d69a4a59c2d08620e6589d823c24be773dc
  8. Affected versionversion=55742d2a071a569bf20f90d37b1b5b8a25a3f882 <fb071f5c75d4b1c177824de74ee75f9dd34123b9

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.9; version=55742d2a071a569bf20f90d37b1b5b8a25a3f882 <03ea2b129344152157418929f06726989efc0445; version=55742d2a071a569bf20f90d37b1b5b8a25a3f882 <0b8fba38bdfb848fac52e71270b2aa3538c996ea; version=55742d2a071a569bf20f90d37b1b5b8a25a3f882 <2b6bb0b4abfd79b8698ee161bb73c0936a2aaf83; version=55742d2a071a569bf20f90d37b1b5b8a25a3f882 <5c9c5d7f26acc2c669c1dcf57d1bb43ee99220ce; version=55742d2a071a569bf20f90d37b1b5b8a25a3f882 <74cd0a421896b2e07eafe7da4275302bfecef201; version=55742d2a071a569bf20f90d37b1b5b8a25a3f882 <9a733d69a4a59c2d08620e6589d823c24be773dc; version=55742d2a071a569bf20f90d37b1b5b8a25a3f882 <fb071f5c75d4b1c177824de74ee75f9dd34123b9
The Linux Kernel Organization · Linux Kernelversion=0 <74cd0a421896; version=1da177e4c3f4 <03ea2b129344; version=1da177e4c3f4 <0b8fba38bdfb; version=1da177e4c3f4 <2b6bb0b4abfd; version=1da177e4c3f4 <5c9c5d7f26ac; version=1da177e4c3f4 <9a733d69a4a5; version=1da177e4c3f4 <fb071f5c75d4

Published CVSS scores

7.8CISACVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.8Linux Kernel CNACVSS: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

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-416Use After Free

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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