CVE-2026-43395

Resource exhaustion via leaked sync references

Published May 8, 2026 · Updated May 8, 2026

Incomplete cleanup in affected Linux Kernel releases allows local users to exhaust kernel resources through Xe sync entries that fail parsing. xe_sync_entry_parse() acquires sync-object, fence, chain-fence, or user-fence references but returns from later error paths without releasing them. Low-privileged local access to an Xe DRM device is required, and repeated failures consume kernel references until availability is impaired.

CVSS severity5.5
Medium
EPSS probability0.12%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Incomplete cleanup in affected Linux Kernel releases allows local users to exhaust kernel resources through Xe sync entries that fail parsing. xe_sync_entry_parse() acquires sync-object, fence, chain-fence, or user-fence references but returns from later error paths without releasing them. Low-privileged local access to an Xe DRM device is required, and repeated failures consume kernel references until availability is impaired.

The record

CVE
CVE-2026-43395
Published
May 8, 2026
Updated
May 8, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-459, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 8, 2026CVE publishedPublication date reported by the CVE source.
  2. May 8, 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=dd08ebf6c3525a7ea2186e636df064ea47281987 <1bfd7575092420ba5a0b944953c95b74a5646ff8
  3. Affected versionversion=dd08ebf6c3525a7ea2186e636df064ea47281987 <91c228f96fcfacc2341a58815b1da8c69da94ebb
  4. Affected versionversion=dd08ebf6c3525a7ea2186e636df064ea47281987 <af65cd1853599394b94201c08bed7a46717db478
  5. Affected versionversion=dd08ebf6c3525a7ea2186e636df064ea47281987 <f0af63ffa06306f12592cd3919fad6957b425e1b

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=6.8; version=dd08ebf6c3525a7ea2186e636df064ea47281987 <1bfd7575092420ba5a0b944953c95b74a5646ff8; version=dd08ebf6c3525a7ea2186e636df064ea47281987 <91c228f96fcfacc2341a58815b1da8c69da94ebb; version=dd08ebf6c3525a7ea2186e636df064ea47281987 <af65cd1853599394b94201c08bed7a46717db478; version=dd08ebf6c3525a7ea2186e636df064ea47281987 <f0af63ffa06306f12592cd3919fad6957b425e1b

Published CVSS scores

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-459Incomplete Cleanup
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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