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CVE Record

CVE-2024-42097: ALSA: emux: improve patch ioctl data validation

In the Linux kernel, the following vulnerability has been resolved: ALSA: emux: improve patch ioctl data validation In load_data(), make the validation of and skipping over the main info block match that in load_guspatch(). In load_guspatch(), add checking that the specified patch length matches the actually supplied data, like load_data() already did.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysisunknown

Security readout for executives and security teams

Plain-English summary

This is a Linux kernel flaw in ALSA emux patch ioctl data validation. The public record says malformed patch data was not checked consistently. The bundle provides no CVSS score and no confirmed exploitation, so business urgency depends on where affected kernels are deployed and whether vendor-fixed kernels are pending.

Executive priority

Prioritize normal kernel security patching and vendor advisory review. Escalate only for sensitive multi-user Linux systems, appliances listed by vendors, or environments where kernel updates are significantly delayed.

Technical view

The fix aligns validation and block skipping between load_data() and load_guspatch(), and adds checking that declared patch length matches supplied data. The vulnerable surface is Linux kernel ALSA emux patch handling. Exact impact class is not stated in the bundle, so memory-safety or privilege-impact claims are not supported here.

Likely exposure

Exposure is most likely on systems running affected Linux kernel versions with the ALSA emux sound functionality available. The affected version data in the bundle is broad and partly commit-oriented, so teams should validate against their distribution or product vendor advisories.

Exploitation context

The source bundle marks KEV as false and does not cite active exploitation or public exploit availability. Treat this as a patch-management issue unless vendor intelligence for a deployed product raises priority.

Researcher notes

The record confirms a bounds/length validation correction but does not specify attack prerequisites, impact, or exploitability. Avoid assuming remote exposure. Useful research should focus on reachable ioctl paths, required privileges, affected configurations, and downstream backport status.

Mitigation direction

  • Update affected Linux kernels through the operating system or product vendor channel.
  • Confirm the update includes the referenced upstream stable kernel fixes.
  • Track Debian LTS and Siemens guidance where those distributions or products are in use.
  • If immediate patching is blocked, check vendor guidance for supported compensating controls.

Validation and detection

  • Inventory Linux kernel versions across servers, workstations, appliances, and embedded products.
  • Map kernel packages to vendor fixed releases or the listed stable commits.
  • Identify systems where ALSA emux or sound subsystems are enabled or exposed to local users.
  • Verify downstream advisories for product-specific affected and fixed versions.
Prepared
Confidence
medium
Sources
12

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-2024-42097 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

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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
3ADP providers
11Source links

SSVC decision data

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

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

CVECVE Program Container
CISA-ADPCISA ADP Vulnrichment
other:ssvc
siemens-SADPADP container

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2unaffected
LinuxLinux2.6.12, 0, 4.19.317, 5.4.279, 5.10.221, 5.15.162, 6.1.97, 6.6.37, 6.9.8, 6.10affected
Weakness

CWE details

No CWE listed

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