CVE-2025-68323

Kernel memory corruption via uncanceled delayed work

Published Dec 18, 2025 · Updated Dec 18, 2025

Use-after-free in Linux 6.16 through 6.17.12 and 6.18 through 6.18.1 allows local users to corrupt kernel memory during GaoKun UCSI removal. gaokun_ucsi_remove() frees the UCSI structures without canceling uec->work, so gaokun_ucsi_register_worker() accesses them while running or pending. The race requires GaoKun UCSI device teardown within the three-second work delay; the documented result is an invalid kernel write detected by KASAN.

CVSS severity7.3
High
EPSS probability0.20%
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 Linux 6.16 through 6.17.12 and 6.18 through 6.18.1 allows local users to corrupt kernel memory during GaoKun UCSI removal. gaokun_ucsi_remove() frees the UCSI structures without canceling uec->work, so gaokun_ucsi_register_worker() accesses them while running or pending. The race requires GaoKun UCSI device teardown within the three-second work delay; the documented result is an invalid kernel write detected by KASAN.

The record

CVE
CVE-2025-68323
Published
Dec 18, 2025
Updated
Dec 18, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 18, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 18, 2025Record 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=00327d7f2c8c512c9b168daae02c8b989f79ec71 <2b7a0f47aaf2439d517ba0a6b29c66a535302154
  2. Affected versionversion=00327d7f2c8c512c9b168daae02c8b989f79ec71 <a880ef71a1c8da266b88491213c37893e2126489
  3. Affected versionversion=00327d7f2c8c512c9b168daae02c8b989f79ec71 <d8ac85c76a4279979b917d4b2f9c6b07d9783003
  4. Affected versionversion=6.16

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=00327d7f2c8c512c9b168daae02c8b989f79ec71 <2b7a0f47aaf2439d517ba0a6b29c66a535302154; version=00327d7f2c8c512c9b168daae02c8b989f79ec71 <a880ef71a1c8da266b88491213c37893e2126489; version=00327d7f2c8c512c9b168daae02c8b989f79ec71 <d8ac85c76a4279979b917d4b2f9c6b07d9783003; version=6.16

Published CVSS scores

7.0SUSECVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
7.3SUSECVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

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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

No sourced classifications are available.

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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