CVE-2024-35921

Kernel crash via failed HEVC initialization

Published May 19, 2024 · Updated Aug 5, 2026

Use-after-free in the Linux 6.5 MediaTek stateless HEVC decoder allows local users to crash the kernel after decoder initialization fails. The decoder stores its instance pointer in the context even when initialization fails, then deinitialization frees the object while the stale pointer remains reachable. Reaching the fault requires local access to a system using the affected MediaTek video-decoder path and a failed HEVC initialization.

CVSS severity7.8
High
EPSS probability0.24%
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 6.5 MediaTek stateless HEVC decoder allows local users to crash the kernel after decoder initialization fails. The decoder stores its instance pointer in the context even when initialization fails, then deinitialization frees the object while the stale pointer remains reachable. Reaching the fault requires local access to a system using the affected MediaTek video-decoder path and a failed HEVC initialization.

The record

CVE
CVE-2024-35921
Published
May 19, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-416, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 19, 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=2674486aac7d9c95ceb77daf7c30f862d4295c1c <521ce0ea7418298d754494fe53263c23c4c78a8e
  2. Affected versionversion=2674486aac7d9c95ceb77daf7c30f862d4295c1c <97c75ee5de060d271d80109b0c47cb6008439e5b
  3. Affected versionversion=2674486aac7d9c95ceb77daf7c30f862d4295c1c <ec25fc3c2c1e8958a51abcfed614f81446d918c4
  4. Affected versionversion=6.5

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=2674486aac7d9c95ceb77daf7c30f862d4295c1c <521ce0ea7418298d754494fe53263c23c4c78a8e; version=2674486aac7d9c95ceb77daf7c30f862d4295c1c <97c75ee5de060d271d80109b0c47cb6008439e5b; version=2674486aac7d9c95ceb77daf7c30f862d4295c1c <ec25fc3c2c1e8958a51abcfed614f81446d918c4; version=6.5

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

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
T1499Endpoint Denial of Service

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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