CVE-2026-43058

Service interruption via vidtv stack copy

Published May 2, 2026 · Updated May 2, 2026

Improper uninitialized-value handling in affected Linux kernel releases allows local users to interrupt service through the vidtv test driver. The vidtv_ts_null_write_into() and vidtv_ts_pcr_write_into() functions copy argument structs by value, carrying uninitialized padding and its MSAN metadata onto the stack. Reachability requires local access and execution of the vidtv transport-stream path; the upstream report documents an MSAN warning, while NVD bounds the assessed consequence to availability.

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

Improper uninitialized-value handling in affected Linux kernel releases allows local users to interrupt service through the vidtv test driver. The vidtv_ts_null_write_into() and vidtv_ts_pcr_write_into() functions copy argument structs by value, carrying uninitialized padding and its MSAN metadata onto the stack. Reachability requires local access and execution of the vidtv transport-stream path; the upstream report documents an MSAN warning, while NVD bounds the assessed consequence to availability.

The record

CVE
CVE-2026-43058
Published
May 2, 2026
Updated
May 2, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-476, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 2, 2026CVE publishedPublication date reported by the CVE source.
  2. May 2, 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=5.10
  2. Affected versionversion=f90cf6079bf67988f8b1ad1ade70fc89d0080905 <1b2820c8a9887981634020db19f1a2425558b88e
  3. Affected versionversion=f90cf6079bf67988f8b1ad1ade70fc89d0080905 <57b01d945ed68cebe486d495dadc4901a96d3aaa
  4. Affected versionversion=f90cf6079bf67988f8b1ad1ade70fc89d0080905 <5f8e73bde67e931468bc2a1860d78d72f0c6ba41
  5. Affected versionversion=f90cf6079bf67988f8b1ad1ade70fc89d0080905 <6d75a9ec5bdb8cf8382eaf8f8fe831ba7d58a9d4
  6. Affected versionversion=f90cf6079bf67988f8b1ad1ade70fc89d0080905 <be57e52e27c7cbfb400a8f255e475cbcff242baa
  7. Affected versionversion=f90cf6079bf67988f8b1ad1ade70fc89d0080905 <e3957eb26a3d570aefc6bb184fa8b8a1e9a4e508

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=5.10; version=f90cf6079bf67988f8b1ad1ade70fc89d0080905 <1b2820c8a9887981634020db19f1a2425558b88e; version=f90cf6079bf67988f8b1ad1ade70fc89d0080905 <57b01d945ed68cebe486d495dadc4901a96d3aaa; version=f90cf6079bf67988f8b1ad1ade70fc89d0080905 <5f8e73bde67e931468bc2a1860d78d72f0c6ba41; version=f90cf6079bf67988f8b1ad1ade70fc89d0080905 <6d75a9ec5bdb8cf8382eaf8f8fe831ba7d58a9d4; version=f90cf6079bf67988f8b1ad1ade70fc89d0080905 <be57e52e27c7cbfb400a8f255e475cbcff242baa; version=f90cf6079bf67988f8b1ad1ade70fc89d0080905 <e3957eb26a3d570aefc6bb184fa8b8a1e9a4e508

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-476NULL Pointer Dereference
T1499.004Application 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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