CVE-2026-64517

Service interruption via managed-buffer double free

Published Jul 25, 2026 · Updated Jul 25, 2026

A double free in drm/xe/gsc in Linux Kernel allows local users to interrupt service during failed device probing and cleanup. xe_gsc_init_post_hwconfig explicitly unpins a buffer returned by xe_managed_bo_create_pin_map even though a devm cleanup action already owns its release, causing probe unwinding to free it again. Reachability requires the Xe GSC initialization failure path and subsequent devm cleanup; the published assessment reports no confidentiality or integrity impact.

CVSS severity5.5
Medium
EPSS probability0.17%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

A double free in drm/xe/gsc in Linux Kernel allows local users to interrupt service during failed device probing and cleanup. xe_gsc_init_post_hwconfig explicitly unpins a buffer returned by xe_managed_bo_create_pin_map even though a devm cleanup action already owns its release, causing probe unwinding to free it again. Reachability requires the Xe GSC initialization failure path and subsequent devm cleanup; the published assessment reports no confidentiality or integrity impact.

The record

CVE
CVE-2026-64517
Published
Jul 25, 2026
Updated
Jul 25, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 25, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 25, 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=2e5d47fe7839298fa096970e184aac9bf82c3bd3 <2c890e71ae26fa32f5a96c3694b71a2c310940e7
  2. Affected versionversion=2e5d47fe7839298fa096970e184aac9bf82c3bd3 <7cb975fcd4777e7bad688f66aa0c10c16dd8276b
  3. Affected versionversion=2e5d47fe7839298fa096970e184aac9bf82c3bd3 <889f70de2b51a877339e1979aab95111b41bed75
  4. Affected versionversion=2e5d47fe7839298fa096970e184aac9bf82c3bd3 <d3ded53fab90996e7d94a39049e11962dd066725
  5. Affected versionversion=6.12

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=2e5d47fe7839298fa096970e184aac9bf82c3bd3 <2c890e71ae26fa32f5a96c3694b71a2c310940e7; version=2e5d47fe7839298fa096970e184aac9bf82c3bd3 <7cb975fcd4777e7bad688f66aa0c10c16dd8276b; version=2e5d47fe7839298fa096970e184aac9bf82c3bd3 <889f70de2b51a877339e1979aab95111b41bed75; version=2e5d47fe7839298fa096970e184aac9bf82c3bd3 <d3ded53fab90996e7d94a39049e11962dd066725; version=6.12

Published CVSS scores

5.5Amazon LinuxCVSS: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

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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