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Back to active CVEs
Unknown severity · Source severity not reportedCVE-2026-98695

USB: serial: fix ioctl hangup raceCVE-2026-98695

Answer in brief

CVE-2026-98695 records a Unknown severity vulnerability in USB: serial: fix ioctl hangup race. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Oct 18, 2026Updated Oct 21, 2026Source checked Oct 25, 2026First seen by HOL Oct 18, 2026Material review Oct 21, 2026
Upstream Advisory

Key facts

Risk
Unknown severitySource severity not reported
Exploitation
Not marked as known exploited
Affected software
3 mapped packages or products
Fix availability
Available

Why this deserves its current priority

A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Linux/Linux (generic), Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
Linux/Linuxgeneric>=f34d7a5b7010b82fe97da95496b9971435530062 <ae0da9a5c1ca95c20cc5feffd511ce6eae75924e || >=f34d7a5b7010b82fe97da95496b9971435530062 <4597ddd6168ae2a4123404e5f0871f1070dc7773 || >=f34d7a5b7010b82fe97da95496b9971435530062 <7912a95d1345c77d8d63b530b00c118700b78abd || >=f34d7a5b7010b82fe97da95496b9971435530062 <ae0e61d95677efa778379853e495d748e6efbf95ae0da9a5c1ca95c20cc5feffd511ce6eae75924e, 4597ddd6168ae2a4123404e5f0871f1070dc7773, 7912a95d1345c77d8d63b530b00c118700b78abd, ae0e61d95677efa778379853e495d748e6efbf95
Linux/Linuxgeneric2.6.26Not reported
Linux/Linuxgeneric>=f34d7a5b7010b82fe97da95496b9971435530062 <24d6edb6bd7f7a9e6cee2f8fe435781daab8aa0f || >=f34d7a5b7010b82fe97da95496b9971435530062 <ae0da9a5c1ca95c20cc5feffd511ce6eae75924e || >=f34d7a5b7010b82fe97da95496b9971435530062 <4597ddd6168ae2a4123404e5f0871f1070dc7773 || >=f34d7a5b7010b82fe97da95496b9971435530062 <7912a95d1345c77d8d63b530b00c118700b78abd || >=f34d7a5b7010b82fe97da95496b9971435530062 <ae0e61d95677efa778379853e495d748e6efbf9524d6edb6bd7f7a9e6cee2f8fe435781daab8aa0f, ae0da9a5c1ca95c20cc5feffd511ce6eae75924e, 4597ddd6168ae2a4123404e5f0871f1070dc7773, 7912a95d1345c77d8d63b530b00c118700b78abd, ae0e61d95677efa778379853e495d748e6efbf95

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux, Linux/Linux.
  2. 2Review the reported fix. Update Linux/Linux to ae0da9a5c1ca95c20cc5feffd511ce6eae75924e; Linux/Linux to 24d6edb6bd7f7a9e6cee2f8fe435781daab8aa0f if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Oct 18, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Oct 21, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Oct 18, 2026

Sources and claim methodology

  • Source referencegit.kernel.org
  • Source referencegit.kernel.org
  • Source referencegit.kernel.org
  • Source referencegit.kernel.org
  • Source referencegit.kernel.org
Upstream source description

In the Linux kernel, the following vulnerability has been resolved: USB: serial: fix ioctl hangup race The tty ioctls can race with hangup and end up calling into a tty driver for a device that is already gone or powered down. Serialise the callbacks using the tty port mutex and add the missing checks to make sure the port has not been hung up before accessing port driver data or hardware. This specifically avoids dereferencing a NULL-pointer if a device is disconnected during lengthy break signalling. Note that TIOCGICOUNT and TIOCMIWAIT do not access port driver data or hardware and are therefore not affected by the race.

Quoted source text, attributed separately from HOL analysis.

Record context

Vulnerability class
Vulnerability
EPSS
Not reported
CWE IDs
Not reported
Source
CVE List V5
Source checked
Oct 25, 2026
References
5 linked sources
Open source record