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VulnerabilityPublished

CVE-2026-63903: Linux kernel · USB: serial: belkin_sa: validate interrupt status length

Affects Linux kernelSource GCVE Database

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Not known to be exploited.

Data as of 30 Oct 2026, 15:36 UTC

Severity
Medium

Rated Medium by Threat Radar's AI analysis · No CVSS score from NVD or the CNA

Thin evidence

One scorer or none

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 19 Jul 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 30 Oct 2026.

What to do

AI-suggested

The vulnerability has been resolved in the Linux kernel by adding checks to validate the interrupt packet length before parsing status fields in the belkin_sa driver. Users should update their Linux kernel to a version that includes this fix once it is available.

Description

A vulnerability in the Linux kernel's USB serial driver for Belkin devices allows out-of-bounds or stale status-byte reads due to improper validation of interrupt status length. The driver assumes a fixed four-byte interrupt status report, but shorter interrupt packets can occur and were not properly checked, leading to potential memory safety issues.

References

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