CVE-2026-68097Network attack vector

Kernel memory read via undersized ACL ACE

Published Aug 10, 2026 · Updated Aug 10, 2026

Out-of-bounds read in affected Linux ksmbd kernels allows remote authenticated users to access kernel memory via an undersized ACL ACE. set_ntacl_dacl() copies an ACE without confirming that its declared size contains every SID sub-authority, causing the POSIX ACL deduplication walk to inspect beyond the copied boundary. Reachability requires an enabled ksmbd server and an authenticated SMB session; public sources do not document the final observable outcome.

CVSS severity8.8
High
EPSS probability0.41%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds read in affected Linux ksmbd kernels allows remote authenticated users to access kernel memory via an undersized ACL ACE. set_ntacl_dacl() copies an ACE without confirming that its declared size contains every SID sub-authority, causing the POSIX ACL deduplication walk to inspect beyond the copied boundary. Reachability requires an enabled ksmbd server and an authenticated SMB session; public sources do not document the final observable outcome.

The record

CVE
CVE-2026-68097
Published
Aug 10, 2026
Updated
Aug 10, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1210
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 10, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 10, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=0 <6.12.101
  2. Affected versionversion=0 <6.18.42
  3. Affected versionversion=0 <6.6.148
  4. Affected versionversion=0 <7.1.6
  5. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <337022d9dfac441c3b35e4455a51aa981996e02e
  6. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <5152c6d49e3fd4e9f2e857c57527aead752f1f87
  7. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <61fd3559199f7fa693dcbff35e59477e24af041a
  8. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <62d80d7c2d9428085e7458ad4c06ca8c0984039b
  9. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <b7cb5bf0855470799f12da825de91e48951b3876

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=0 <6.12.101; version=0 <6.18.42; version=0 <6.6.148; version=0 <7.1.6; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <337022d9dfac441c3b35e4455a51aa981996e02e; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <5152c6d49e3fd4e9f2e857c57527aead752f1f87; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <61fd3559199f7fa693dcbff35e59477e24af041a; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <62d80d7c2d9428085e7458ad4c06ca8c0984039b; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <b7cb5bf0855470799f12da825de91e48951b3876

Published CVSS scores

8.8CanonicalCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

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.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1210Exploitation of Remote Services

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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