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  4. CVE 2022 49426 iommuarm smmu v3 sva fix mm use after free
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Back to active CVEs
High · CVSS 7.8CVE-2022-49426

iommu/arm-smmu-v3-sva: Fix mm use-after-freeCVE-2022-49426

Answer in brief

CVE-2022-49426 records a High severity (CVSS 7.8) vulnerability in iommu/arm-smmu-v3-sva: Fix mm use-after-free. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (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 Feb 26, 2025Updated Aug 5, 2026Source checked Nov 3, 2026First seen by HOL Aug 5, 2026Material review Aug 5, 2026
Upstream Advisory

Key facts

Risk
High · CVSS 7.8
Exploitation
Not marked as known exploited
Affected software
2 mapped packages or products
Fix availability
Available

Why this deserves its current priority

CVSS is 7.8. 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 Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
Linux/Linuxgeneric>=32784a9562fb0518b12e9797ee2aec52214adf6f <fc90f13ea0dcd960e5002d204fa55cec4e0db2fa || >=32784a9562fb0518b12e9797ee2aec52214adf6f <e3cbbdbff8a4db5d053c53fd71be62ccccdb52b0 || >=32784a9562fb0518b12e9797ee2aec52214adf6f <9aa215450888cf29af0c479e14a712dc6b0c506c || >=32784a9562fb0518b12e9797ee2aec52214adf6f <cbd23144f7662b00bcde32a938c4a4057e476d68fc90f13ea0dcd960e5002d204fa55cec4e0db2fa, e3cbbdbff8a4db5d053c53fd71be62ccccdb52b0, 9aa215450888cf29af0c479e14a712dc6b0c506c, cbd23144f7662b00bcde32a938c4a4057e476d68
Linux/Linuxgeneric5.11Not reported

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
  2. 2Review the reported fix. Update Linux/Linux to fc90f13ea0dcd960e5002d204fa55cec4e0db2fa if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Feb 26, 2025

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

  2. Source modified

    Aug 5, 2026

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

  3. First seen by HOL

    Aug 5, 2026

Sources and claim methodology

  • Source referencegit.kernel.org
  • Source referencegit.kernel.org
  • Source referencegit.kernel.org
  • Source referencegit.kernel.org
Upstream source description

In the Linux kernel, the following vulnerability has been resolved: iommu/arm-smmu-v3-sva: Fix mm use-after-free We currently call arm64_mm_context_put() without holding a reference to the mm, which can result in use-after-free. Call mmgrab()/mmdrop() to ensure the mm only gets freed after we unpinned the ASID.

Quoted source text, attributed separately from HOL analysis.

Record context

Vulnerability class
Memory Corruption
EPSS
Not reported
CWE IDs
CWE-416
Source
CVE List V5
Source checked
Nov 3, 2026
References
4 linked sources
Open source record