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CVE-2025-10101— Avast antivirus heap buffer OOB read when scanning a malformed Mach-O file

Quick assessment

Affected
Gen Digital Avast Antivirus
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Avast Antivirus是捷克Avast公司的一套杀毒软件。 Avast Antivirus 15.7版本至3.9.2025之前版本存在安全漏洞，该漏洞源于堆缓冲区溢出和越界写入，可能导致本地代码执行或拒绝服务。

CVSS 7.8 · High EPSS 0.18% · P7

Affected Version Matrix 5

VendorProduct Version RangeStatus
Gen Digital Avast Antivirus < 25090300 affected
Gen Digital Avast Business Antivirus < 25090300 affected
Gen Digital Avast One < 25090300 affected
Gen Digital AVG Antivirus < 25090300 affected
Gen Digital Norton Antivirus < 25090300 affected
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I. Basic Information for CVE-2025-10101

Vulnerability Information
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Vulnerability Title
Avast antivirus heap buffer OOB read when scanning a malformed Mach-O file
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存读
Source: CVE Program / CVE List V5
Vulnerability Title
Avast Antivirus 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Avast Antivirus是捷克Avast公司的一套杀毒软件。 Avast Antivirus 15.7版本至3.9.2025之前版本存在安全漏洞，该漏洞源于堆缓冲区溢出和越界写入，可能导致本地代码执行或拒绝服务。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Gen Digital Avast Antivirus 0 ~ 25090300 -
Gen Digital AVG Antivirus 0 ~ 25090300 -
Gen Digital Norton Antivirus 0 ~ 25090300 -
Gen Digital Avast One 0 ~ 25090300 -
Gen Digital Avast Business Antivirus 0 ~ 25090300 -

II. Public POCs for CVE-2025-10101

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III. Intelligence Information for CVE-2025-10101

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IV. Related Vulnerabilities

Same product: Avast Antivirus
Same vendor: Gen Digital
Same weakness: CWE-125

V. Comments for CVE-2025-10101

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