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CVE Record

CVE-2026-43058: media: vidtv: fix pass-by-value structs causing MSAN warnings

In the Linux kernel, the following vulnerability has been resolved: media: vidtv: fix pass-by-value structs causing MSAN warnings vidtv_ts_null_write_into() and vidtv_ts_pcr_write_into() take their argument structs by value, causing MSAN to report uninit-value warnings. While only vidtv_ts_null_write_into() has triggered a report so far, both functions share the same issue. Fix by passing both structs by const pointer instead, avoiding the stack copy of the struct along with its MSAN shadow and origin metadata. The functions do not modify the structs, which is enforced by the const qualifier.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysislow

Security readout for executives and security teams

Plain-English summary

This Linux kernel CVE concerns the vidtv media code copying internal structs by value, which triggered MemorySanitizer uninitialized-value warnings. The public record describes a code-quality and correctness fix, not a demonstrated data breach, privilege escalation, or remote attack path.

Executive priority

Handle through routine kernel vulnerability management. There is no sourced evidence of exploitation or high-impact behavior, but kernel updates should still be tracked because distribution impact may differ from upstream notes.

Technical view

vidtv_ts_null_write_into() and vidtv_ts_pcr_write_into() accepted structs by value, creating stack copies with MSAN shadow and origin metadata. The fix passes those structs by const pointer because the functions do not modify them. No CVSS, CWE, or concrete security impact is provided.

Likely exposure

Exposure appears limited to Linux kernels containing the affected vidtv media code in the listed affected versions or branches. The bundle does not identify affected distributions, enabled kernel configs, packages, cloud images, or whether vidtv must be loaded.

Exploitation context

The source bundle does not show active exploitation. KEV is false, and the referenced description only mentions MSAN warnings from uninitialized-value reporting, not a public exploit, attacker prerequisite, or exploitation technique.

Researcher notes

The record frames this as a sanitizer-reported uninitialized-value warning caused by pass-by-value function parameters in media/vidtv. Impact evidence is incomplete: no CVSS, CWE, attacker model, information disclosure, crash, privilege boundary, or reachable attack surface is described.

Mitigation direction

  • Track vendor kernel advisories for your distribution or appliance vendor.
  • Update to a kernel containing the referenced stable fix when available.
  • Prioritize normal kernel patch cadence unless vendor guidance raises severity.
  • Document any systems using custom or self-built Linux kernels.
  • Avoid inventing compensating controls without vendor impact guidance.

Validation and detection

  • Inventory Linux kernel versions across servers, appliances, and images.
  • Check whether vendor kernel advisories map this CVE to your packages.
  • For custom kernels, compare source against the referenced stable commits.
  • Confirm patch deployment through kernel package version or source commit review.
  • Record that no KEV listing is present in the provided evidence.
Prepared
Confidence
medium
Sources
11

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

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CVE-2026-43058 mapping review

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors
3Timeline events
0ADP providers
10Source links

Vulnerability timeline

Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.

  1. CVE reservedCVE Program

    The CVE ID was reserved by the assigning CNA.

  2. CVE publishedCVE Program

    The CVE record was published.

  3. CVE updatedCVE Program

    The CVE record metadata indicates this as the latest update time.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinuxf90cf6079bf67988f8b1ad1ade70fc89d0080905, f90cf6079bf67988f8b1ad1ade70fc89d0080905, f90cf6079bf67988f8b1ad1ade70fc89d0080905, f90cf6079bf67988f8b1ad1ade70fc89d0080905, f90cf6079bf67988f8b1ad1ade70fc89d0080905, f90cf6079bf67988f8b1ad1ade70fc89d0080905, f90cf6079bf67988f8b1ad1ade70fc89d0080905, f90cf6079bf67988f8b1ad1ade70fc89d0080905, f90cf6079bf67988f8b1ad1ade70fc89d0080905unaffected
LinuxLinux5.10, 0, 5.10.258, 5.15.209, 6.1.175, 6.6.136, 6.12.83, 6.18.24, 6.19.14, 7.0.1, 7.1affected
Weakness

CWE details

No CWE listed

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