Security readout for executives and security teams
Plain-English summary
CVE-2024-26747 is a Linux kernel availability bug in USB role switching. A local highly privileged user could trigger a NULL pointer condition after related device removal, potentially crashing the system. It is not reported as actively exploited in the provided sources.
Executive priority
Treat as scheduled kernel maintenance unless affected systems have high uptime requirements or many local privileged users. The business risk is service interruption, not data theft, based on the provided CVSS and sources.
Technical view
The USB role class driver could dereference missing parent/module state when a usb_role_switch parent device is removed before the switch reference is released. The kernel fix stores the module pointer in usb_role_switch, avoiding lookup through parent relationships after removal.
Likely exposure
Exposure is limited to Linux systems running affected kernel lines and using the USB role switch subsystem. The CVE data lists affected 4.19, 5.10.211, 5.15.150, 6.1.80, 6.6.19, 6.7.7, and 6.8 ranges.
Exploitation context
The CVSS vector is local, low complexity, high privileges required, no user interaction, and availability-only impact. The provided bundle marks KEV as false, so there is no source-supported evidence of active exploitation.
Researcher notes
Evidence supports a kernel NULL pointer availability issue fixed in stable commits. The source bundle does not provide a public exploit, affected hardware list, or detailed distribution package matrix beyond the Debian LTS reference.
Mitigation direction
- Update to vendor-supported Linux kernel builds containing the referenced stable fixes.
- Check distribution advisories, including Debian LTS, for packaged kernel updates.
- Prioritize systems where local privileged users or workloads can interact with USB role switching.
- Apply normal kernel reboot procedures after installing patched packages.
Validation and detection
- Inventory kernel versions across Linux hosts and appliances.
- Compare installed kernels with vendor advisories and stable fix references.
- Check kernel changelogs for the CVE or referenced USB role switch commits.
- Review logs for NULL pointer crashes involving USB role switching.
- Regression-test USB role switching on hardware that depends on it.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
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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CWE-476: Exact CWE lookup
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Open ATT&CK lookupCVE-2024-26747 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Medium
- CVSS
- 4.4 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
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.
SSVC decision data
CVSS vector scores
1 official scoreWe 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.
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H0.83.6CISA-ADPVulnerability scoring details
Base CVSS 3.1 score
4.4MediumVector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- https://git.kernel.org/stable/c/e279bf8e51893e1fe160b3d8126ef2dd00f661e1CVE reference, Linux
- https://git.kernel.org/stable/c/ef982fc41055fcebb361a92288d3225783d12913CVE reference, Linux
- https://git.kernel.org/stable/c/0158216805ca7e498d07de38840d2732166ae5faCVE reference, Linux
- https://git.kernel.org/stable/c/4b45829440b1b208948b39cc71f77a37a2536734CVE reference, Linux
- https://git.kernel.org/stable/c/01f82de440f2ab07c259b7573371e1c42e5565dbCVE reference, Linux
- https://git.kernel.org/stable/c/1c9be13846c0b2abc2480602f8ef421360e1ad9eCVE reference, Linux
- https://lists.debian.org/debian-lts-announce/2024/06/msg00017.htmlCVE reference, CVE · x_transferred
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
NULL Pointer Dereference
NULL Pointer Dereference represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.