CVE-2026-98363

Out-of-bounds read via unchecked SCPI OPP count

Published Oct 6, 2026 · Updated Oct 6, 2026

Linux's ARM SCPI DVFS driver reads past a fixed-size firmware reply when the SCP reports more operating points than the reply can contain. In scpi_dvfs_get_info(), the unchecked opp_count controls iteration over buf.opps[] despite that array holding only MAX_DVFS_OPPS entries, and it sizes the allocated OPP table from the same count. Exposure requires an ARM Linux system using SCPI DVFS and an oversized SCP firmware reply; the available evidence does not establish a remote or local user-controlled entry point.

CVSS severityUnavailable
Unscored
EPSS probability0.17%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Linux's ARM SCPI DVFS driver reads past a fixed-size firmware reply when the SCP reports more operating points than the reply can contain. In scpi_dvfs_get_info(), the unchecked opp_count controls iteration over buf.opps[] despite that array holding only MAX_DVFS_OPPS entries, and it sizes the allocated OPP table from the same count. Exposure requires an ARM Linux system using SCPI DVFS and an oversized SCP firmware reply; the available evidence does not establish a remote or local user-controlled entry point.

The record

CVE
CVE-2026-98363
Published
Oct 6, 2026
Updated
Oct 6, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
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=4.4
  2. Affected versionversion=8cb7cf56c9fe5412de238465b27ef35b4d2801aa <0130f9ad3974a5b2ad0fa03d0b300a9fb83ed901
  3. Affected versionversion=8cb7cf56c9fe5412de238465b27ef35b4d2801aa <1aadbef648e92ca642125f188f99b0a26628e3ba
  4. Affected versionversion=8cb7cf56c9fe5412de238465b27ef35b4d2801aa <32471d84a487c7fd74532bc96be56f8028cf4a3f
  5. Affected versionversion=8cb7cf56c9fe5412de238465b27ef35b4d2801aa <69ec03cd481973e4be44a7158ed6c0fa06a9a5f9
  6. Affected versionversion=8cb7cf56c9fe5412de238465b27ef35b4d2801aa <7daaa684097377b66b98a832de307688a7f3bbc7
  7. Affected versionversion=8cb7cf56c9fe5412de238465b27ef35b4d2801aa <cc563a59aded6f3b02d75dcc3c0bc5e90755d99e
  8. Affected versionversion=8cb7cf56c9fe5412de238465b27ef35b4d2801aa <e9887eeaa138c6b5697af3d2f7c71dc82407b154
  9. Affected versionversion=8cb7cf56c9fe5412de238465b27ef35b4d2801aa <f17865332cc4ceaac846bcd7c28badbaedfabeff

What conditions does exploitation require?

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

What is affected?

The Linux Kernel Organization · Linuxversion=4.4; version=8cb7cf56c9fe5412de238465b27ef35b4d2801aa <0130f9ad3974a5b2ad0fa03d0b300a9fb83ed901; version=8cb7cf56c9fe5412de238465b27ef35b4d2801aa <1aadbef648e92ca642125f188f99b0a26628e3ba; version=8cb7cf56c9fe5412de238465b27ef35b4d2801aa <32471d84a487c7fd74532bc96be56f8028cf4a3f; version=8cb7cf56c9fe5412de238465b27ef35b4d2801aa <69ec03cd481973e4be44a7158ed6c0fa06a9a5f9; version=8cb7cf56c9fe5412de238465b27ef35b4d2801aa <7daaa684097377b66b98a832de307688a7f3bbc7; version=8cb7cf56c9fe5412de238465b27ef35b4d2801aa <cc563a59aded6f3b02d75dcc3c0bc5e90755d99e; version=8cb7cf56c9fe5412de238465b27ef35b4d2801aa <e9887eeaa138c6b5697af3d2f7c71dc82407b154; version=8cb7cf56c9fe5412de238465b27ef35b4d2801aa <f17865332cc4ceaac846bcd7c28badbaedfabeff

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

No sourced classifications are available.

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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