Avast antivirus heap buffer OOB read when scanning a malformed Mach-O file
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Gen Digital | Avast Antivirus | affected |
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| Gen Digital | AVG Antivirus | affected |
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| Gen Digital | Norton Antivirus | affected |
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| Gen Digital | Avast One | affected |
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| Gen Digital | Avast Business Antivirus | affected |
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No data.
No data.
| Vendor | Product | Versions |
|---|---|---|
| Apple | Macos | — |
| Avast | Antivirus | — |
Vendor Solution
Install virus definitions VPS 25090300 or any later virus-definition update. All builds at or above VPS 25090300 include the fix; staying current on definitions is required.
No CVSS v4.0
No CVSS v3.0
No CVSS v2
This CVE is not in the KEV list.
Exploit prediction score: < 1% (0.190% probability within 30 days)
| Type | Values Removed | Values Added |
|---|---|---|
| Weaknesses | CWE-122 CWE-787 |
| Type | Values Removed | Values Added |
|---|---|---|
| Description | Heap-based Buffer Overflow, Out-of-bounds Write vulnerability in Avast Antivirus on MacOS of a crafted Mach-O file may allow Local Execution of Code or Denial of Service of antivirus protection. This issue affects Antivirus: from 15.7 before 3.9.2025. | Heap buffer out-of-bounds read vulnerability in Avast Antivirus when scanning a malformed Mach-O file may allow Local Execution of Code or Denial-of-Service of the antivirus process. This issue affects Avast Antivirus, AVG Antivirus, Norton Antivirus, Avast One, and Avast Business Antivirus on Windows, macOS, and Linux for virus definition builds before VPS 25090300. The affected scanning logic is delivered through a shared Gen Digital virus definition update stream. The same stream feeds the consumer antivirus products listed in this advisory and other Gen Digital products that embed the same engine. Mitigation flows through this update channel; installations at or above the listed build are not vulnerable regardless of which product consumes the stream. |
| Title | Crafted Mach-O file may allow Remote Code Execution in Avast Antivirus 15.7 on MacOS | Avast antivirus heap buffer OOB read when scanning a malformed Mach-O file |
| Weaknesses | CWE-125 | |
| Metrics |
cvssV3_1
|
cvssV3_1
|
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Apple
Apple macos Avast Avast antivirus |
|
| Vendors & Products |
Apple
Apple macos Avast Avast antivirus |
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
ssvc
|
| Type | Values Removed | Values Added |
|---|---|---|
| Title | Crafted Mach-O file may allow Remote Code Execution in Avast Antivirus 15.7 on MacOS |
| Type | Values Removed | Values Added |
|---|---|---|
| Description | Heap-based Buffer Overflow, Out-of-bounds Write vulnerability in Avast Antivirus on MacOS of a crafted Mach-O file may allow Local Execution of Code or Denial of Service of antivirus protection. This issue affects Antivirus: from 15.7 before 3.9.2025. | |
| Weaknesses | CWE-122 CWE-787 |
|
| References |
| |
| Metrics |
cvssV3_1
|