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CVE Record

CVE-2026-64041: ASoC: codecs: fs210x: fix possible buffer overflow

In the Linux kernel, the following vulnerability has been resolved: ASoC: codecs: fs210x: fix possible buffer overflow In fs210x_effect_scene_info(), a string was copied like this: strscpy(DST, SRC, strlen(SRC) + 1); A buffer overflow would happen if strlen(SRC) >= sizeof(DST). Actually, strscpy() must be used this way: strscpy(DST, SRC, sizeof(DST)); strscpy(DST, SRC); // defaults to sizeof(DST)

HighCVSS 7.8Not KEV-listedUpdated
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Glexia's TakeAutomated analysishigh

Security readout for executives and security teams

Plain-English summary

CVE-2026-64041 is a Linux kernel flaw in the fs210x audio codec driver. A string copy used the source length instead of the destination buffer size, creating a possible buffer overflow. The CVSS rating is high, but the attack path is local and requires low privileges, not unauthenticated remote access.

Executive priority

Treat as a high-priority kernel maintenance issue for Linux fleets with local multi-user exposure or embedded audio hardware. It is not presented as remotely exploitable in the supplied sources, so prioritize after internet-facing critical flaws unless local-user risk is material.

Technical view

The issue is in fs210x_effect_scene_info() in the Linux kernel ASoC fs210x codec code. strscpy() was called with strlen(SRC)+1, which can exceed the destination buffer when the source string is too long. The fix changes copying to use the destination buffer size or strscpy() default sizing.

Likely exposure

Exposure appears limited to Linux systems running affected kernels that include and use the fs210x ASoC codec driver path. The source bundle lists Linux kernel versions and stable commits, but does not identify affected distributions, device models, or default configurations.

Exploitation context

The CVSS vector indicates local access, low complexity, low privileges, no user interaction, and high confidentiality, integrity, and availability impact. The bundle says KEV is false and provides no cited evidence of active exploitation or public weaponization.

Researcher notes

Evidence is concise and source-limited. The affected-version data contains generic Linux entries, numeric versions, and commit identifiers, but no distro matrix. Analysis should focus on confirming reachability of fs210x_effect_scene_info(), whether attacker-controlled strings can reach it locally, and whether downstream vendors have backported the stable commits.

Mitigation direction

  • Update to a kernel or vendor package containing the referenced stable fixes.
  • Check Linux distribution advisories for backported fixes matching CVE-2026-64041.
  • Prioritize systems where untrusted local users can access affected audio driver functionality.
  • Restrict local shell access on exposed multi-user systems pending remediation.
  • Monitor vendor guidance if no patched package is available yet.

Validation and detection

  • Inventory Linux kernel versions across endpoints, appliances, and embedded systems.
  • Determine whether the fs210x ASoC codec driver is present or enabled.
  • Map installed kernels against vendor advisories and referenced stable commits.
  • Confirm patched builds include the corrected strscpy() destination-size usage.
  • Document exceptions where affected code is absent or unreachable.
Prepared
Confidence
medium
Sources
5

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-2026-64041 mapping review

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Vulnerability profileCVE Program record
Severity
High
CVSS
7.8 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

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.

1CVSS vectors
3Timeline events
0ADP providers
4Source links

CVSS vector scores

1 official score

We collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.

ScoreVersionSeverityVectorExploitImpactSource
7.8CVSS 3.1HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H1.85.9Linux

Vulnerability scoring details

Base CVSS 3.1 score

7.8High
CVSS 3.1 vector shape for CVE-2026-64041Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone

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
LinuxLinux75611770177965ae902c87c96eace07542beff07, 75611770177965ae902c87c96eace07542beff07, 75611770177965ae902c87c96eace07542beff07unaffected
LinuxLinux6.18, 0, 6.18.34, 7.0.11, 7.1affected
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.