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Back to active CVEs
Unknown severity · Source severity not reportedCVE-2026-98751

tty: abort break signalling on hangupCVE-2026-98751

Answer in brief

CVE-2026-98751 records a Unknown severity vulnerability in tty: abort break signalling on hangup. 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 <3bc82999fb85cecc7eb6ec1755ee7d698aa1e783 || >=f34d7a5b7010b82fe97da95496b9971435530062 <94af6cd832e9b4ce39a8fb59144a8f09ab56fd35 || >=f34d7a5b7010b82fe97da95496b9971435530062 <c8ccd3b2013daaf77b98f8a6724fcf4d2c5c52d6 || >=f34d7a5b7010b82fe97da95496b9971435530062 <845a2737e0f5ffe5ca8d38de556012b0c9472cdd3bc82999fb85cecc7eb6ec1755ee7d698aa1e783, 94af6cd832e9b4ce39a8fb59144a8f09ab56fd35, c8ccd3b2013daaf77b98f8a6724fcf4d2c5c52d6, 845a2737e0f5ffe5ca8d38de556012b0c9472cdd
Linux/Linuxgeneric2.6.26Not reported
Linux/Linuxgeneric>=f34d7a5b7010b82fe97da95496b9971435530062 <6c9c9367351a461d62e5c0a39bffdcfbb40f068b || >=f34d7a5b7010b82fe97da95496b9971435530062 <3bc82999fb85cecc7eb6ec1755ee7d698aa1e783 || >=f34d7a5b7010b82fe97da95496b9971435530062 <94af6cd832e9b4ce39a8fb59144a8f09ab56fd35 || >=f34d7a5b7010b82fe97da95496b9971435530062 <c8ccd3b2013daaf77b98f8a6724fcf4d2c5c52d6 || >=f34d7a5b7010b82fe97da95496b9971435530062 <845a2737e0f5ffe5ca8d38de556012b0c9472cdd6c9c9367351a461d62e5c0a39bffdcfbb40f068b, 3bc82999fb85cecc7eb6ec1755ee7d698aa1e783, 94af6cd832e9b4ce39a8fb59144a8f09ab56fd35, c8ccd3b2013daaf77b98f8a6724fcf4d2c5c52d6, 845a2737e0f5ffe5ca8d38de556012b0c9472cdd

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 3bc82999fb85cecc7eb6ec1755ee7d698aa1e783; Linux/Linux to 6c9c9367351a461d62e5c0a39bffdcfbb40f068b 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: tty: abort break signalling on hangup The break ioctls can race with hangup and end up calling into a tty driver for a device that is already gone or powered down. Drivers must handle this race, but TCSBRK and TCSBRKP should still be aborted to avoid calling back into the driver after a user-controlled timeout (possibly even after the tty has been reopened). Note that drivers should disable any break state on shutdown so just return on hangup (calling break_ctl() again is racy and will most likely fail for drivers handling 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