CVE-2026-43183

Service interrupt via unreleased memory region

Published May 6, 2026 · Updated May 6, 2026

Resource leak in the cx25821 PCI media driver in Linux Kernel allows local users to cause a service interrupt during device setup. cx25821_dev_setup() reserves a memory region through cx25821_get_resources() but fails to call release_mem_region() when ioremap() fails. Reachability requires the cx25821 driver and its device-setup failure path; the leaked reservation affects availability without exposing or altering data.

CVSS severity5.5
Medium
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

Resource leak in the cx25821 PCI media driver in Linux Kernel allows local users to cause a service interrupt during device setup. cx25821_dev_setup() reserves a memory region through cx25821_get_resources() but fails to call release_mem_region() when ioremap() fails. Reachability requires the cx25821 driver and its device-setup failure path; the leaked reservation affects availability without exposing or altering data.

The record

CVE
CVE-2026-43183
Published
May 6, 2026
Updated
May 6, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-401, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 6, 2026CVE publishedPublication date reported by the CVE source.
  2. May 6, 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=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <071bfc6e723aabbbf08f0d439fb913cd01eb8de2
  2. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <4010e596d23cda6de65acb14f7fd4ce8289f1d49
  3. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <68cd8ac994cac38a305200f638b30e13c690753b
  4. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <80ce3797dc99dae4ce8b939626b891c9eb85139f
  5. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <9f1c926248bde95a77ca104ab525467470607836
  6. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <b7210170b10e2d17f7a4f6b9d39cc092442db860
  7. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <e220ec4c4596d634685b8a08d79ad876a720b466
  8. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <f7759eb6738ee9fc296f6ab1705c6809947976f3

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <071bfc6e723aabbbf08f0d439fb913cd01eb8de2; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <4010e596d23cda6de65acb14f7fd4ce8289f1d49; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <68cd8ac994cac38a305200f638b30e13c690753b; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <80ce3797dc99dae4ce8b939626b891c9eb85139f; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <9f1c926248bde95a77ca104ab525467470607836; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <b7210170b10e2d17f7a4f6b9d39cc092442db860; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <e220ec4c4596d634685b8a08d79ad876a720b466; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <f7759eb6738ee9fc296f6ab1705c6809947976f3

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 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-401Missing Release of Memory after Effective Lifetime
T1499.004Application or System Exploitation

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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