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CVE Record

CVE-2026-23155: can: gs_usb: gs_usb_receive_bulk_callback(): fix error message

In the Linux kernel, the following vulnerability has been resolved: can: gs_usb: gs_usb_receive_bulk_callback(): fix error message Sinc commit 79a6d1bfe114 ("can: gs_usb: gs_usb_receive_bulk_callback(): unanchor URL on usb_submit_urb() error") a failing resubmit URB will print an info message. In the case of a short read where netdev has not yet been assigned, initialize as NULL to avoid dereferencing an undefined value. Also report the error value of the failed resubmit.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysisunknown

Security readout for executives and security teams

Plain-English summary

This Linux kernel issue is in the gs_usb CAN-over-USB driver. A short USB read followed by a failed URB resubmit could use an uninitialized network-device pointer while logging an error. The sources describe a kernel bug fix, but provide no CVSS score, impact statement, or exploitation evidence.

Executive priority

Treat this as a targeted Linux kernel maintenance item, not an emergency based on current evidence. Prioritize affected industrial, automotive, lab, or embedded systems using USB CAN adapters, and fold remediation into normal kernel patch governance unless vendor guidance raises severity.

Technical view

After commit 79a6d1bfe114, a failed URB resubmit printed an info message. In a short-read path, netdev might not yet be assigned. The fix initializes it to NULL and reports the failed resubmit error value, avoiding dereference of an undefined value.

Likely exposure

Exposure appears limited to Linux systems using the gs_usb CAN USB driver. The bundle lists kernel commit identifiers and fixed kernel versions, not distribution package names, so environment-specific exposure requires mapping installed kernels to vendor advisories.

Exploitation context

The bundle does not cite CISA KEV, public exploitation, proof-of-concept activity, or attacker requirements. The available text indicates an error-handling bug in a USB CAN driver, but not whether it is practically exploitable beyond fault conditions.

Researcher notes

The record lacks CVSS, CWE, CPEs, and exploit evidence. Analysis should focus on the gs_usb receive bulk callback error path, affected stable branches, and distribution backports. Avoid assuming broader USB or CAN stack impact without vendor confirmation.

Mitigation direction

  • Check Linux vendor advisories for fixed kernels containing the referenced stable commits.
  • Prioritize systems using gs_usb CAN USB devices or CAN bus tooling.
  • Plan kernel updates to versions including the upstream stable fixes.
  • If updates are delayed, review whether gs_usb hardware support is required.

Validation and detection

  • Inventory Linux kernel versions and enabled gs_usb driver usage.
  • Map installed distro kernels to the referenced upstream stable commits.
  • Review kernel logs for gs_usb short-read or URB resubmit errors.
  • Confirm patched kernels include fixes for CVE-2026-23155.
Prepared
Confidence
medium
Sources
8

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-2026-23155 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
7Source 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
LinuxLinuxda01de754e455e2598a7f1ce4ff2078c4f0ecde1, aa8a8866c533a150be4763bcb27993603bd5426c, ce4352057fc5a986c76ece90801b9755e7c6e56c, c610b550ccc0438d456dfe1df9f4f36254ccaae3, c3edc14da81a8d8398682f6e4ab819f09f37c0b7, 79a6d1bfe1148bc921b8d7f3371a7fbce44e30f7unaffected
LinuxLinux6.6.122, 6.12.68, 6.18.8unaffected
Weakness

CWE details

No CWE listed

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