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CVE Record

CVE-2024-56657: ALSA: control: Avoid WARN() for symlink errors

In the Linux kernel, the following vulnerability has been resolved: ALSA: control: Avoid WARN() for symlink errors Using WARN() for showing the error of symlink creations don't give more information than telling that something goes wrong, since the usual code path is a lregister callback from each control element creation. More badly, the use of WARN() rather confuses fuzzer as if it were serious issues. This patch downgrades the warning messages to use the normal dev_err() instead of WARN(). For making it clearer, add the function name to the prefix, too.

MediumCVSS 5.5Not KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

This is a Linux kernel ALSA issue where an error path used a kernel WARN() for symlink creation failures. The fix changes that to normal error logging. The main business risk is local availability disruption, not data theft or remote compromise, based on the supplied CVSS vector.

Executive priority

Treat this as routine kernel hygiene with moderate availability relevance. It does not justify emergency response from the supplied evidence, but should be included in normal Linux patch cycles, especially for shared systems where local users can trigger kernel paths.

Technical view

The resolved change affects ALSA control element registration error handling. Symlink creation failures previously triggered WARN(), which can be treated as serious by fuzzers and may contribute to availability impact. The patch downgrades reporting to dev_err() and clarifies the function name in the log prefix.

Likely exposure

Exposure is limited to Linux systems running affected kernel builds with the ALSA control code present. The CVSS vector requires local access and low privileges. Workstations, multi-user Linux hosts, and audio-enabled systems are more relevant than isolated appliances with no local users.

Exploitation context

The bundle states KEV is false and provides no cited evidence of active exploitation. CVSS describes local, low-complexity exploitation with low privileges, no user interaction, and availability impact only. No exploit method is described in the provided sources.

Researcher notes

Evidence is narrow: the source describes a WARN() downgrade in ALSA control symlink error handling. No CWE, exploit details, or active exploitation are provided. Avoid overstating impact beyond local availability and verify exact affected status through distro kernel advisories.

Mitigation direction

  • Inventory Linux kernel versions against the affected ranges in vendor advisories.
  • Apply stable kernel updates containing the referenced ALSA control fix commits.
  • Prioritize multi-user Linux systems and systems exposing audio/control devices locally.
  • Check distribution guidance for backported fixes before relying on upstream version numbers.
  • If patching is delayed, monitor vendor advisories and kernel logs for related warnings.

Validation and detection

  • Confirm the running kernel package includes the relevant stable fix or distro backport.
  • Review kernel changelogs for the ALSA control symlink WARN() change.
  • Validate that affected systems are not running unpatched vulnerable kernel builds.
  • Track local-user-access systems separately because remote exposure is not indicated.
  • Document any vendor exception where ALSA is absent or unreachable.
Prepared
Confidence
high
Sources
7

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.

ATT&CK lookup starting points

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CVE-2024-56657 mapping review

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Vulnerability profileCVE Program record
Severity
Medium
CVSS
5.5 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/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
1ADP providers
6Source links

SSVC decision data

CISA-ADPCISA Coordinator
Timestamp
Version
2.0.3
Exploitation: noneAutomatable: noTechnical Impact: partial

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
5.5CVSS 3.1MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H1.83.6CISA-ADP

Vulnerability scoring details

Base CVSS 3.1 score

5.5Medium
CVSS 3.1 vector shape for CVE-2024-56657Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

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

ADP provider summaries

CISA-ADPCISA ADP Vulnrichment
cvssV3_1other:ssvc

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinuxa135dfb5de1501327895729b4f513370d2555b4d, a135dfb5de1501327895729b4f513370d2555b4d, a135dfb5de1501327895729b4f513370d2555b4d, a135dfb5de1501327895729b4f513370d2555b4d, a135dfb5de1501327895729b4f513370d2555b4dunaffected
LinuxLinux5.13, 0, 5.15.209, 6.1.175, 6.6.67, 6.12.6, 6.13affected
Weakness

CWE details

No CWE listed

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