CVE-2024-49925

Kernel disclosure or crash via stale sysfs attributes

Published Oct 21, 2024 · Updated Aug 5, 2026

Use-after-free in the Linux efifb driver allows local users to disclose kernel-heap data or crash the system through repeated sysfs reads. During efifb teardown, unregister_framebuffer frees struct fb_info before the manually registered attribute groups are removed, leaving their read-only show handlers able to dereference the freed object. Exploitation requires racing a narrow driver-removal window triggered by root or an automatic DRM handoff; the path cannot write kernel memory.

CVSS severity7.1
High
EPSS probability0.27%
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 efifb driver allows local users to disclose kernel-heap data or crash the system through repeated sysfs reads. During efifb teardown, unregister_framebuffer frees struct fb_info before the manually registered attribute groups are removed, leaving their read-only show handlers able to dereference the freed object. Exploitation requires racing a narrow driver-removal window triggered by root or an automatic DRM handoff; the path cannot write kernel memory.

The record

CVE
CVE-2024-49925
Published
Oct 21, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-416, T1005
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 21, 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

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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=4.10
  2. Affected versionversion=753375a881caa01112b7cec2c796749154e0bb23 <2a9c40c72097b583b23aeb2a26d429ccfc81fbc1
  3. Affected versionversion=753375a881caa01112b7cec2c796749154e0bb23 <2d97b85eb5a86766ad0f8ea3d121e6ae144e3ed8
  4. Affected versionversion=753375a881caa01112b7cec2c796749154e0bb23 <36bfefb6baaa8e46de44f4fd919ce4347337620f
  5. Affected versionversion=753375a881caa01112b7cec2c796749154e0bb23 <4684d69b9670a83992189f6271dc0fcdec4ed0d7
  6. Affected versionversion=753375a881caa01112b7cec2c796749154e0bb23 <872cd2d029d2c970a8a1eea88b48dab2b3f2e93a
  7. Affected versionversion=753375a881caa01112b7cec2c796749154e0bb23 <95cdd538e0e5677efbdf8aade04ec098ab98f457

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.10; version=753375a881caa01112b7cec2c796749154e0bb23 <2a9c40c72097b583b23aeb2a26d429ccfc81fbc1; version=753375a881caa01112b7cec2c796749154e0bb23 <2d97b85eb5a86766ad0f8ea3d121e6ae144e3ed8; version=753375a881caa01112b7cec2c796749154e0bb23 <36bfefb6baaa8e46de44f4fd919ce4347337620f; version=753375a881caa01112b7cec2c796749154e0bb23 <4684d69b9670a83992189f6271dc0fcdec4ed0d7; version=753375a881caa01112b7cec2c796749154e0bb23 <872cd2d029d2c970a8a1eea88b48dab2b3f2e93a; version=753375a881caa01112b7cec2c796749154e0bb23 <95cdd538e0e5677efbdf8aade04ec098ab98f457

Published CVSS scores

7.1Linux kernel CNACVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/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
T1005Data from Local System

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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