CVE-2026-68263

Kernel crash via double scheduler entity finalization

Published Aug 10, 2026 · Updated Aug 10, 2026

Use-after-free in the Linux kernel allows local users to crash affected systems locally during PowerVR context teardown. The pvr_context_kill_queues path calls drm_sched_entity_destroy, which finalizes each scheduler entity before pvr_queue_destroy finalizes it again. Reaching the flaw requires an affected drm/imagination driver and a PowerVR context teardown; the second finalization underflows a reference count and accesses freed state.

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 allows local users to crash affected systems locally during PowerVR context teardown. The pvr_context_kill_queues path calls drm_sched_entity_destroy, which finalizes each scheduler entity before pvr_queue_destroy finalizes it again. Reaching the flaw requires an affected drm/imagination driver and a PowerVR context teardown; the second finalization underflows a reference count and accesses freed state.

The record

CVE
CVE-2026-68263
Published
Aug 10, 2026
Updated
Aug 10, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-911, T1068, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 10, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 10, 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=6.8
  2. Affected versionversion=eaf01ee5ba28b97f96a3d3eec4c5fbfb37ee4cde <4af24c27a39ba147a613a09e10b9e0f7294524c0
  3. Affected versionversion=eaf01ee5ba28b97f96a3d3eec4c5fbfb37ee4cde <9be3f4bd6f514f69c51a8c77ea64fce2729dc7f4
  4. Affected versionversion=eaf01ee5ba28b97f96a3d3eec4c5fbfb37ee4cde <c1136d907fd04ca5c62ba11c1159b5fe65a1760c
  5. Affected versionversion=eaf01ee5ba28b97f96a3d3eec4c5fbfb37ee4cde <c88fdbf3da26e0179629530cae7768cd3d4ead85

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.8; version=eaf01ee5ba28b97f96a3d3eec4c5fbfb37ee4cde <4af24c27a39ba147a613a09e10b9e0f7294524c0; version=eaf01ee5ba28b97f96a3d3eec4c5fbfb37ee4cde <9be3f4bd6f514f69c51a8c77ea64fce2729dc7f4; version=eaf01ee5ba28b97f96a3d3eec4c5fbfb37ee4cde <c1136d907fd04ca5c62ba11c1159b5fe65a1760c; version=eaf01ee5ba28b97f96a3d3eec4c5fbfb37ee4cde <c88fdbf3da26e0179629530cae7768cd3d4ead85

Published CVSS scores

7.1Red HatCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
6.6Amazon LinuxCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:H
7.8cve.orgCVSS: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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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-911Improper Update of Reference Count
T1068Exploitation for Privilege Escalation
T1499Endpoint Denial of Service

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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