CVE-2026-98237

Receive-thread hang via cyclic modem NDP chain

Published Oct 6, 2026 · Updated Oct 6, 2026

An infinite loop in Linux's MHI MBIM driver allows context-dependent attackers to hang a receive thread through a cyclic NDP from a modem. In mhi_mbim_rx(), traversal accepts a nonzero wNextNdpIndex even when it points to the current or an earlier NDP, so the same NTB is parsed indefinitely. Triggering the flaw requires malformed data delivered by an attached MHI modem; the demonstrated result is one CPU pinned at 100%, not a proven whole-system outage.

CVSS severityUnavailable
Unscored
EPSS probability0.18%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

An infinite loop in Linux's MHI MBIM driver allows context-dependent attackers to hang a receive thread through a cyclic NDP from a modem. In mhi_mbim_rx(), traversal accepts a nonzero wNextNdpIndex even when it points to the current or an earlier NDP, so the same NTB is parsed indefinitely. Triggering the flaw requires malformed data delivered by an attached MHI modem; the demonstrated result is one CPU pinned at 100%, not a proven whole-system outage.

The record

CVE
CVE-2026-98237
Published
Oct 6, 2026
Updated
Oct 6, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
Unavailable
Privileges
Unavailable

Timeline

How it unfolded

  1. Oct 6, 2026CVE publishedPublication date reported by the CVE source.
  2. Oct 6, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=5.15
  2. Affected versionversion=aa730a9905b7b079ef2fffdab7f15dbb842f5c7c <19b5e8dd884a530d04482e1a8e547f43cad17ed7
  3. Affected versionversion=aa730a9905b7b079ef2fffdab7f15dbb842f5c7c <24ade82d6d993274e99c2c6998848751c35292e7
  4. Affected versionversion=aa730a9905b7b079ef2fffdab7f15dbb842f5c7c <3ed36ee1b29b028f6bc2ebe100152f61a33df05a
  5. Affected versionversion=aa730a9905b7b079ef2fffdab7f15dbb842f5c7c <5d063822ac5184939c1ed377a339a01d8ae814e8
  6. Affected versionversion=aa730a9905b7b079ef2fffdab7f15dbb842f5c7c <829fec45122da58d77a55a3b7ca514dafab98e77
  7. Affected versionversion=aa730a9905b7b079ef2fffdab7f15dbb842f5c7c <8dad70ff7e25cbcfbcb5101fdbf36d98003eb653
  8. Affected versionversion=aa730a9905b7b079ef2fffdab7f15dbb842f5c7c <e4b2c7b50d4f4aa1ddfff731b136d65f65b2b526

What conditions does exploitation require?

Attack vectorUnavailable in this record.
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=5.15; version=aa730a9905b7b079ef2fffdab7f15dbb842f5c7c <19b5e8dd884a530d04482e1a8e547f43cad17ed7; version=aa730a9905b7b079ef2fffdab7f15dbb842f5c7c <24ade82d6d993274e99c2c6998848751c35292e7; version=aa730a9905b7b079ef2fffdab7f15dbb842f5c7c <3ed36ee1b29b028f6bc2ebe100152f61a33df05a; version=aa730a9905b7b079ef2fffdab7f15dbb842f5c7c <5d063822ac5184939c1ed377a339a01d8ae814e8; version=aa730a9905b7b079ef2fffdab7f15dbb842f5c7c <829fec45122da58d77a55a3b7ca514dafab98e77; version=aa730a9905b7b079ef2fffdab7f15dbb842f5c7c <8dad70ff7e25cbcfbcb5101fdbf36d98003eb653; version=aa730a9905b7b079ef2fffdab7f15dbb842f5c7c <e4b2c7b50d4f4aa1ddfff731b136d65f65b2b526

Published CVSS scores

No CVSS assessment is available in this record.

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Activity data is delayed. The latest report is Sep 28, 2026.

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No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
VectorUnavailable
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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