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CVE Record

CVE-2025-38629: ALSA: usb: scarlett2: Fix missing NULL check

In the Linux kernel, the following vulnerability has been resolved: ALSA: usb: scarlett2: Fix missing NULL check scarlett2_input_select_ctl_info() sets up the string arrays allocated via kasprintf(), but it misses NULL checks, which may lead to NULL dereference Oops. Let's add the proper NULL check.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

CVE-2025-38629 is a Linux kernel bug in the ALSA USB Scarlett2 audio driver. A missing check after memory allocation can cause a NULL pointer dereference and kernel Oops. The public record does not show active exploitation or a CVSS score. Business impact is mainly stability risk on systems using this driver path.

Executive priority

Treat as routine-to-moderate kernel maintenance. Patch during the next appropriate maintenance window, faster for systems using USB audio hardware. There is no public evidence here of exploitation in the wild.

Technical view

scarlett2_input_select_ctl_info() builds string arrays with kasprintf() but did not verify allocation success. If allocation returns NULL, later use may dereference NULL and trigger an Oops. The issue is resolved in referenced Linux stable commits. Source version data indicates Linux kernel exposure, but exact downstream package impact requires vendor mapping.

Likely exposure

Most relevant to Linux systems with the ALSA USB Scarlett2 driver available or in use, especially systems connected to supported Focusrite Scarlett devices. Exposure for servers without USB audio use is likely limited, but kernel builds may still include the driver.

Exploitation context

No cited source or KEV entry indicates active exploitation. The described failure depends on an allocation failure in a specific ALSA USB driver code path, suggesting denial-of-service or local stability impact rather than data theft.

Researcher notes

The public description is narrow: missing NULL checks around kasprintf() in scarlett2_input_select_ctl_info(). No CVSS, CWE, exploit details, or complete downstream distribution mapping are provided. Validate impact against kernel source, stable commits, and vendor backport notes.

Mitigation direction

  • Apply Linux kernel updates containing the referenced stable fixes.
  • Check your distribution’s advisory for CVE-2025-38629 package status.
  • Reduce unnecessary USB audio driver exposure where operationally feasible.
  • Prioritize endpoints or workstations using Scarlett USB audio hardware.

Validation and detection

  • Identify running Linux kernel versions across affected assets.
  • Check whether the scarlett2 ALSA USB driver is present or loaded.
  • Confirm installed kernel includes one of the referenced stable fixes.
  • Review distribution changelogs for CVE-2025-38629 backports.
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

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CVE-2025-38629 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
4Source 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
LinuxLinux8eba063b5b2b498ddd01ea6f29fc9b12368c3d53, 8eba063b5b2b498ddd01ea6f29fc9b12368c3d53, 8eba063b5b2b498ddd01ea6f29fc9b12368c3d53unaffected
LinuxLinux6.13, 0, 6.15.10, 6.16.1, 6.17affected
Weakness

CWE details

No CWE listed

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