CVE-2026-31599

Kernel crash via unchecked allocation failure

Published Apr 24, 2026 · Updated Apr 24, 2026

NULL pointer dereference in Linux Kernel vidtv allows local users to crash the kernel while starting a virtual tuner stream. vidtv_channel_pmt_match_sections fails to check whether vidtv_psi_pmt_stream_init returned NULL after a memory-allocation failure, then passes &tail->descriptor to vidtv_psi_desc_assign and dereferences the null tail pointer. Exploitation requires local access, the nondefault vidtv test driver, and an allocation failure while a virtual tuner feed starts; the bounded impact is a kernel crash.

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

NULL pointer dereference in Linux Kernel vidtv allows local users to crash the kernel while starting a virtual tuner stream. vidtv_channel_pmt_match_sections fails to check whether vidtv_psi_pmt_stream_init returned NULL after a memory-allocation failure, then passes &tail->descriptor to vidtv_psi_desc_assign and dereferences the null tail pointer. Exploitation requires local access, the nondefault vidtv test driver, and an allocation failure while a virtual tuner feed starts; the bounded impact is a kernel crash.

The record

CVE
CVE-2026-31599
Published
Apr 24, 2026
Updated
Apr 24, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-476, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 24, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 24, 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?

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  1. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <07c1e474cf9acf777f09d14a8f8dfcef5b84e46f
  2. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <2dff11fb5098ae453651f8f77e94ad499c078022
  3. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <b832cfd516b8504e95884622cee60bf9a39b7945
  4. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <e589de36da106ef739ba98f66f5a5c2023370706

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <07c1e474cf9acf777f09d14a8f8dfcef5b84e46f; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <2dff11fb5098ae453651f8f77e94ad499c078022; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <b832cfd516b8504e95884622cee60bf9a39b7945; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <e589de36da106ef739ba98f66f5a5c2023370706

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-476NULL Pointer Dereference
T1499.004Endpoint Denial of Service: Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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