Vulnerability · CVE-2026-21399
インテルのOpen VKLにおけるヒープベースのバッファオーバーフローの脆弱性
Published Aug 11, 2026 · catalog updated Aug 12, 2026 · Intel(R) Open Volume Kernel Library (Intel(R) Open VKL) library maintained by intel(R)
Check if you run it
No confirmed exploitation is on record for CVE-2026-21399. EPSS is 0.11%. Act only if a listed version of Intel(R) Open Volume Kernel Library (Intel(R) Open VKL) library maintained by intel(R) is installed.
Gaps on this record
- No version range is stored. A customer cannot check an installed version against this record.
- No vendor fix or required action is stored. Compare the linked advisory before you change production.
- Severity
- Medium6.9
- Known exploitation
- Not in CISA/VulnCheck KEV
- EPSS
- 0.11%
- Remediation
- Advisory link
- Affected products
- vendor n/a Intel(R) Open Volume Kernel Library (Intel(R) Open VKL) library maintained by intel(R)
Heap-based buffer overflow for the Intel(R) Open Volume Kernel Library (Intel(R) Open VKL) library maintained by intel(R) before version 2.0.2 within Ring 3: User Applications may allow a denial of service. System software adversary with an authenticated user combined with a low complexity attack may enable denial of service. This result may potentially occur via local access when attack requirements are not present without special internal knowledge and requires no user interaction. The potential vulnerability may impact the confidentiality (none), integrity (low) and availability (high) of the vulnerable system, resulting in subsequent system confidentiality (none), integrity (none) and availability (none) impacts.
Are you affected?
Enter the version you run. The result uses only the ranges stored on this record.
The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.
- vendor n/a Intel(R) Open Volume Kernel Library (Intel(R) Open VKL) library maintained by intel(R)version unspecified
How to fix CVE-2026-21399
Recommended remediation
A patch or advisory reference is linked. Open the original publisher for availability by product version.
Official advisories
What to do
Three questions, each answered from this record only. Confirm the vendor advisory before you patch.
Should you patch?
No confirmed exploitation is on record for CVE-2026-21399. EPSS is 0.11%. Act only if a listed version of Intel(R) Open Volume Kernel Library (Intel(R) Open VKL) library maintained by intel(R) is installed.
Which versions are affected?
Affected version ranges are not on this record. Compare the installed version with the linked vendor advisory before you change production.
What should an analyst verify?
CWE-122: Heap-based Buffer Overflow. EPSS 0.11%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.
Code
The project this record applies to. Exploit listings stay in References.
No public source repository is identified for this product.
Timeline
Detection, updates, and resolution for this record.
Aug 12, 2026 · CVE.org
Updated
Heap-based buffer overflow for the Intel(R) Open Volume Kernel Library (Intel(R) Open VKL) library maintained by intel(R) before version 2.0.2 within Ring 3: User Applications may allow a denial of service. System software adversary with an authenticated user combined with a low complexity attack may enable denial of service. This result may potentially occur via local access when attack requireme
Oct 16, 2026 · JVN iPedia
Detected
インテル(R)によって管理されているIntel(R) Open Volume Kernel Library(Intel(R) Open VKL)ライブラリのバージョン2.0.2未満には、リング3のユーザーアプリケーション内におけるヒープベースのバッファオーバーフローが存在し、これによりサービス拒否が引き起こされる可能性があります。認証されたユーザー権限を持つシステムソフトウェアの攻撃者が、低複雑度の攻撃手法を組み合わせることでサービス拒否を引き起こす可能性があります。この影響は、特別な内部知識がなくても攻撃要件を満たさない場合にローカルアクセス経由で発生し、ユーザーの操作を必要としません。この潜在的な脆弱性は、脆弱なシステムの機密性(なし)、完全性(低)、可用性(高)に影響を与える可能性があり、結果として後続のシステムの機密性(なし)、完全性(なし)、可用性(なし)にも影響をもたらします。
Sources
- CVE.orgVulnerability recordCVE-2026-21399
Heap-based buffer overflow for the Intel(R) Open Volume Kernel Library (Intel(R) Open VKL) library maintained by intel(R) before version 2.0.2 within Ring 3: User Applications may allow a denial of service. System software adversary with an authenticated user combined with a low
cve.org - FIRST EPSSExploitation probabilityCVE-2026-21399
30-day exploitation probability 0.1%
first.org - JVN iPediaGovernment advisoryCVE-2026-21399
インテル(R)によって管理されているIntel(R) Open Volume Kernel Library(Intel(R) Open VKL)ライブラリのバージョン2.0.2未満には、リング3のユーザーアプリケーション内におけるヒープベースのバッファオーバーフローが存在し、これによりサービス拒否が引き起こされる可能性があります。認証されたユーザー権限を持つシステムソフトウェアの攻撃者が、低複雑度の攻撃手法を組み合わせることでサービス拒否を引き起こす可能性があります。この影響は、特別な内部知識がなくても攻撃要件を満たさない場合にローカルアクセス経由で発生
jvndb.jvn.jp
References
Freshness
Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.