SB2026081052 - Fedora EPEL 8 update for clamav

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Main Vulnerability Database SB2026081052

SB2026081052 - Fedora EPEL 8 update for clamav

Published: August 10, 2026

Security Bulletin ID SB2026081052
CSH Severity
High
Patch available
YES
Number of vulnerabilities 6
Exploitation vector Remote access
Highest impact Code execution

Breakdown by Severity

High 33% Medium 67%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 6 vulnerabilities.


1) Improper error handling (CVE-ID: CVE-2026-20031)

CWE-ID: CWE-388 - Error Handling

CVSSv4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows a remote attacker to perform a denial of service attack.

The vulnerability exists due to incorrect error handling when parsing HTML code. A remote attacker can pass specially crafted input to the application and perform a denial of service attack. 


2) Allocation of Resources Without Limits or Throttling (CVE-ID: CVE-2026-20216)

CWE-ID: CWE-770 - Allocation of Resources Without Limits or Throttling

CVSSv4: 6.7 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows a remote attacker to cause a denial of service.

The vulnerability exists due to improper enforcement of extraction limits in InstallShield archive handling when scanning a crafted InstallShield archive. A remote attacker can provide a specially crafted archive to cause a denial of service.

The issue can exhaust temporary storage by writing far more temporary data than intended.


3) Integer overflow (CVE-ID: CVE-2026-20215)

CWE-ID: CWE-190 - Integer overflow

CVSSv4: 8.4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows a remote attacker to execute arbitrary code.

The vulnerability exists due to integer overflow in the 7z parser substream count handling when parsing a malformed archive. A remote attacker can provide a specially crafted archive to execute arbitrary code.

The issue can under-allocate parser metadata arrays and write past them while reading the archive.


4) Release of invalid pointer or reference (CVE-ID: CVE-2026-20217)

CWE-ID: CWE-763 - Release of invalid pointer or reference

CVSSv4: 6.7 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows a remote attacker to cause a denial of service.

The vulnerability exists due to invalid pointer free in the PESpin unpacker cleanup path when scanning a crafted PE file. A remote attacker can provide a specially crafted file to cause a denial of service.


5) Integer underflow (CVE-ID: CVE-2026-20214)

CWE-ID: CWE-191 - Integer underflow

CVSSv4: 8.4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows a remote attacker to execute arbitrary code.

The vulnerability exists due to integer underflow in the FSG unpacker loop when scanning a malformed PE file. A remote attacker can provide a specially crafted file to execute arbitrary code.

The issue can write past the section array.


6) Input validation error (CVE-ID: CVE-2026-20244)

CWE-ID: CWE-20 - Improper input validation

CVSSv4: 6.7 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows a remote attacker to cause a denial of service.

The vulnerability exists due to improper size checks in the DMG parser when parsing a crafted DMG file on 32-bit builds. A remote attacker can provide a specially crafted file to cause a denial of service.

Only 32-bit scanner builds are affected.


Remediation

Install update from vendor's website.

References