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  4. CVE 2026 18448 leak smm ram from the kernel simply tsa after an
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Back to active CVEs
Medium · CVSS 5.6CVE-2026-18448

Leak SMM RAM from the kernel (Simply TSA after an SMI)CVE-2026-18448

Answer in brief

CVE-2026-18448 records a Medium severity (CVSS 5.6) vulnerability in Leak SMM RAM from the kernel (Simply TSA after an SMI). The current sources do not mark it as known exploited. The current feed maps TianoCore/EDK2 (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Nov 10, 2026Updated Nov 10, 2026Source checked Nov 10, 2026First seen by HOL Nov 10, 2026Material review Nov 10, 2026
Upstream Advisory

Key facts

Risk
Medium · CVSS 5.6
Exploitation
Not marked as known exploited
Affected software
1 mapped package or product
Fix availability
Not reported

Why this deserves its current priority

CVSS is 5.6. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps TianoCore/EDK2 (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
TianoCore/EDK2generic>=0 <=edk2-stable202608Not reported

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for TianoCore/EDK2.
  2. 2Review the reported fix. Monitor this advisory for an available fix and review any installs of the affected package.

Evidence timeline and material changes

  1. Published upstream

    Nov 10, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Nov 10, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Nov 10, 2026

Sources and claim methodology

  • GitHub security advisorygithub.com
Upstream source description

EDK2 contains a vulnerability in BIOS where a privileged attacker may cause “Exposure of Sensitive Information during Transient Execution” by local access. Successful exploitation of this vulnerability may result in disclosure of SMRAM contents. It could also impact Confidentiality.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • AMD MmSaveStateLib SysCall path performs out-of-bounds writes for partial save-state readsSame tianocore/edk2 package

Record context

Vulnerability class
Vulnerability
EPSS
Not reported
CWE IDs
CWE-1420
Source
CVE List V5
Source checked
Nov 10, 2026
References
1 linked source
Open source record