CVE-2026-98205

Kernel stack disclosure via short EVIOCSABS ioctl

Published Oct 6, 2026 · Updated Oct 6, 2026

Information disclosure in Linux evdev allows local users with access to an input event device to read kernel stack bytes via ioctls. The EVIOCSABS handler copies a user-sized prefix into an uninitialized input_absinfo structure, stores the entire structure, and EVIOCGABS returns its stale tail. Exploitation requires an accessible input event device supporting absolute axes and permission to issue the setting ioctl; the disclosed data is residual kernel stack content.

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

Information disclosure in Linux evdev allows local users with access to an input event device to read kernel stack bytes via ioctls. The EVIOCSABS handler copies a user-sized prefix into an uninitialized input_absinfo structure, stores the entire structure, and EVIOCGABS returns its stale tail. Exploitation requires an accessible input event device supporting absolute axes and permission to issue the setting ioctl; the disclosed data is residual kernel stack content.

The record

CVE
CVE-2026-98205
Published
Oct 6, 2026
Updated
Oct 6, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
local
Privileges
authenticated

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=2.6.36
  2. Affected versionversion=448cd1664a573e69f54bfd32f3bb7220212b6cf5 <30b853a3d71f16bd0aa66b604bc37dd1254a19b3
  3. Affected versionversion=448cd1664a573e69f54bfd32f3bb7220212b6cf5 <3dfe48d5307a1ba22c58231d04257737015569ca
  4. Affected versionversion=448cd1664a573e69f54bfd32f3bb7220212b6cf5 <71e5619db11dd6429101bd967230d0321ec5ea26
  5. Affected versionversion=448cd1664a573e69f54bfd32f3bb7220212b6cf5 <89b6ffa4bc10c436fa9aecc73be105124cd58a35
  6. Affected versionversion=448cd1664a573e69f54bfd32f3bb7220212b6cf5 <8b852965b8eaf910c314dc346967ed82c8d4f235
  7. Affected versionversion=448cd1664a573e69f54bfd32f3bb7220212b6cf5 <af5f7130cbf39e6e12336d0b7a5f6e76e4e1526b
  8. Affected versionversion=448cd1664a573e69f54bfd32f3bb7220212b6cf5 <c0aebb57b73c7d06ad21731099afe119b113c403
  9. Affected versionversion=448cd1664a573e69f54bfd32f3bb7220212b6cf5 <e834e134a32b6a5c600fa539bb49146f617743ab

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=2.6.36; version=448cd1664a573e69f54bfd32f3bb7220212b6cf5 <30b853a3d71f16bd0aa66b604bc37dd1254a19b3; version=448cd1664a573e69f54bfd32f3bb7220212b6cf5 <3dfe48d5307a1ba22c58231d04257737015569ca; version=448cd1664a573e69f54bfd32f3bb7220212b6cf5 <71e5619db11dd6429101bd967230d0321ec5ea26; version=448cd1664a573e69f54bfd32f3bb7220212b6cf5 <89b6ffa4bc10c436fa9aecc73be105124cd58a35; version=448cd1664a573e69f54bfd32f3bb7220212b6cf5 <8b852965b8eaf910c314dc346967ed82c8d4f235; version=448cd1664a573e69f54bfd32f3bb7220212b6cf5 <af5f7130cbf39e6e12336d0b7a5f6e76e4e1526b; version=448cd1664a573e69f54bfd32f3bb7220212b6cf5 <c0aebb57b73c7d06ad21731099afe119b113c403; version=448cd1664a573e69f54bfd32f3bb7220212b6cf5 <e834e134a32b6a5c600fa539bb49146f617743ab

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)
Vectorlocal
Privilegesauthenticated
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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