CVE-2026-98668Hinoki check available

Heap disclosure via uninitialized buffer padding

Published Oct 18, 2026 · Updated Oct 18, 2026

Heap disclosure in Linux IIO buffers allows local users to read uninitialized kernel memory through buffered sensor reads. The iio_push_to_buffers_with_ts_unaligned() helper allocates its bounce buffer without clearing padding between sample data and the timestamp. Exposure requires access to an affected IIO buffer with timestamps enabled and sample data whose length is not a multiple of eight bytes; the disclosed impact is memory disclosure, not memory modification.

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

What happened

Heap disclosure in Linux IIO buffers allows local users to read uninitialized kernel memory through buffered sensor reads. The iio_push_to_buffers_with_ts_unaligned() helper allocates its bounce buffer without clearing padding between sample data and the timestamp. Exposure requires access to an affected IIO buffer with timestamps enabled and sample data whose length is not a multiple of eight bytes; the disclosed impact is memory disclosure, not memory modification.

The record

CVE
CVE-2026-98668
Published
Oct 18, 2026
Updated
Oct 18, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. Oct 18, 2026CVE publishedPublication date reported by the CVE source.
  2. Oct 18, 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=5.16
  2. Affected versionversion=95ec3fdf2b79eaff79e78688bbc2f7dbb98d68b6 <3a87212b1a09a1fdd730ce5520f7b1fc0b488511
  3. Affected versionversion=95ec3fdf2b79eaff79e78688bbc2f7dbb98d68b6 <5330036bc68d23672bfcc16c60c54701ae123083
  4. Affected versionversion=95ec3fdf2b79eaff79e78688bbc2f7dbb98d68b6 <b134ef820610bd873c9d59999d9824710964ce82
  5. Affected versionversion=95ec3fdf2b79eaff79e78688bbc2f7dbb98d68b6 <b5c2f21f645e40c70fda2a4283e6f2a81e5cb9f2

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=5.16; version=95ec3fdf2b79eaff79e78688bbc2f7dbb98d68b6 <3a87212b1a09a1fdd730ce5520f7b1fc0b488511; version=95ec3fdf2b79eaff79e78688bbc2f7dbb98d68b6 <5330036bc68d23672bfcc16c60c54701ae123083; version=95ec3fdf2b79eaff79e78688bbc2f7dbb98d68b6 <b134ef820610bd873c9d59999d9824710964ce82; version=95ec3fdf2b79eaff79e78688bbc2f7dbb98d68b6 <b5c2f21f645e40c70fda2a4283e6f2a81e5cb9f2

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
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.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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