CVE-2023-53219

Kernel compromise via timer teardown use-after-free

Published Sep 15, 2025 · Updated Sep 15, 2025

Use-after-free in the Linux NetUP UniDVB driver allows local users to crash or compromise the kernel during PCI device removal. netup_unidvb_dma_fini() calls del_timer(), which can return while netup_unidvb_dma_timeout() is still using the soon-freed device object. Exploitation requires local privileges to unbind, unload, or hot-remove a NetUP PCIe DVB card while its DMA timer handler is running.

CVSS severity7.8
High
EPSS probability0.16%
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 NetUP UniDVB driver allows local users to crash or compromise the kernel during PCI device removal. netup_unidvb_dma_fini() calls del_timer(), which can return while netup_unidvb_dma_timeout() is still using the soon-freed device object. Exploitation requires local privileges to unbind, unload, or hot-remove a NetUP PCIe DVB card while its DMA timer handler is running.

The record

CVE
CVE-2023-53219
Published
Sep 15, 2025
Updated
Sep 15, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-416, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 15, 2025CVE publishedPublication date reported by the CVE source.
  2. Sep 15, 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=4.3
  2. Affected versionversion=52b1eaf4c59a3bbd07afbb4ab4f43418a807d02e <051af3f0b7d1cd8ab7f3e2523ad8ae1af44caba3
  3. Affected versionversion=52b1eaf4c59a3bbd07afbb4ab4f43418a807d02e <07821524f67bf920342bc84ae8b3dea2a315a89e
  4. Affected versionversion=52b1eaf4c59a3bbd07afbb4ab4f43418a807d02e <0f5bb36bf9b39a2a96e730bf4455095b50713f63
  5. Affected versionversion=52b1eaf4c59a3bbd07afbb4ab4f43418a807d02e <1550bcf2983ae1220cc8ab899a39a423fa7cb523
  6. Affected versionversion=52b1eaf4c59a3bbd07afbb4ab4f43418a807d02e <90229e9ee957d4514425e4a4d82c50ab5d57ac4d
  7. Affected versionversion=52b1eaf4c59a3bbd07afbb4ab4f43418a807d02e <c8f9c05e1ebcc9c7bc211cc8b74d8fb86a8756fc
  8. Affected versionversion=52b1eaf4c59a3bbd07afbb4ab4f43418a807d02e <dd5c77814f290b353917df329f36de1472d47154
  9. Affected versionversion=52b1eaf4c59a3bbd07afbb4ab4f43418a807d02e <f9982db735a8495eee14267cf193c806b957e942

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.3; version=52b1eaf4c59a3bbd07afbb4ab4f43418a807d02e <051af3f0b7d1cd8ab7f3e2523ad8ae1af44caba3; version=52b1eaf4c59a3bbd07afbb4ab4f43418a807d02e <07821524f67bf920342bc84ae8b3dea2a315a89e; version=52b1eaf4c59a3bbd07afbb4ab4f43418a807d02e <0f5bb36bf9b39a2a96e730bf4455095b50713f63; version=52b1eaf4c59a3bbd07afbb4ab4f43418a807d02e <1550bcf2983ae1220cc8ab899a39a423fa7cb523; version=52b1eaf4c59a3bbd07afbb4ab4f43418a807d02e <90229e9ee957d4514425e4a4d82c50ab5d57ac4d; version=52b1eaf4c59a3bbd07afbb4ab4f43418a807d02e <c8f9c05e1ebcc9c7bc211cc8b74d8fb86a8756fc; version=52b1eaf4c59a3bbd07afbb4ab4f43418a807d02e <dd5c77814f290b353917df329f36de1472d47154; version=52b1eaf4c59a3bbd07afbb4ab4f43418a807d02e <f9982db735a8495eee14267cf193c806b957e942

Published CVSS scores

7.8CISA ADPCVSS: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
T1068Exploitation for Privilege Escalation

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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