CVE-2026-98114Network attack vectorHinoki check available

ACL corruption via truncated ACE acceptance

Published Sep 25, 2026 · Updated Sep 25, 2026

Improper ACL validation in Linux 5.15 ksmbd allows remote authenticated users to apply incomplete access controls via malformed SMB security descriptors. parse_dacl() accepts truncated ACEs and allocation failures without returning an error, so set_info_sec() proceeds with a partially converted DACL. An authenticated SMB user able to set security information can cause inode attributes or ACL extended attributes to be updated from that incomplete conversion.

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

Improper ACL validation in Linux 5.15 ksmbd allows remote authenticated users to apply incomplete access controls via malformed SMB security descriptors. parse_dacl() accepts truncated ACEs and allocation failures without returning an error, so set_info_sec() proceeds with a partially converted DACL. An authenticated SMB user able to set security information can cause inode attributes or ACL extended attributes to be updated from that incomplete conversion.

The record

CVE
CVE-2026-98114
Published
Sep 25, 2026
Updated
Sep 25, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1222.001
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 25, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 25, 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=e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 <37952f03d5171eb3a33b2abc2cf6e456d69ff4a1
  3. Affected versionversion=e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 <461f10a5297e85b7c1cd21838922f2e57b934d2d
  4. Affected versionversion=e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 <a04dac1f2cffe9533f4260f0659297d805e69194
  5. Affected versionversion=e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 <c61dc7b1b4a3234b4aa3965502908a292238805c

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.15; version=e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 <37952f03d5171eb3a33b2abc2cf6e456d69ff4a1; version=e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 <461f10a5297e85b7c1cd21838922f2e57b934d2d; version=e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 <a04dac1f2cffe9533f4260f0659297d805e69194; version=e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 <c61dc7b1b4a3234b4aa3965502908a292238805c

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)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1222.001File and Directory Permissions Modification

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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