SUSE-SU-2026:23727-1: important: Security update for clamav

SLE-SECURITY-UPDATES null at suse.de
Wed Sep 16 16:32:11 UTC 2026 

# Security update for clamav

Announcement ID: SUSE-SU-2026:23727-1  
Release Date: 2026-09-11T12:10:01Z  
Rating: important  
References:

  * bsc#1271922
  * bsc#1274597
  * bsc#1274598
  * bsc#1274599
  * bsc#1274600
  * bsc#1274601
  * bsc#1274602
  * bsc#1274603

  
Cross-References:

  * CVE-2025-8088
  * CVE-2026-20337
  * CVE-2026-20338
  * CVE-2026-20339
  * CVE-2026-20345
  * CVE-2026-20346
  * CVE-2026-20347
  * CVE-2026-20348
  * CVE-2026-46671

  
CVSS scores:

  * CVE-2025-8088 ( NVD ):  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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
  * CVE-2025-8088 ( NVD ):  8.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
  * CVE-2026-20337 ( SUSE ):  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
  * CVE-2026-20337 ( SUSE ):  7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  * CVE-2026-20337 ( NVD ):  7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  * CVE-2026-20338 ( SUSE ):  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
  * CVE-2026-20338 ( SUSE ):  7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  * CVE-2026-20338 ( NVD ):  7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  * CVE-2026-20339 ( SUSE ):  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
  * CVE-2026-20339 ( SUSE ):  7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  * CVE-2026-20339 ( NVD ):  7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  * CVE-2026-20345 ( SUSE ):  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
  * CVE-2026-20345 ( SUSE ):  7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  * CVE-2026-20345 ( NVD ):  7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  * CVE-2026-20346 ( SUSE ):  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
  * CVE-2026-20346 ( SUSE ):  7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  * CVE-2026-20346 ( NVD ):  7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  * CVE-2026-20347 ( SUSE ):  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
  * CVE-2026-20347 ( SUSE ):  7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  * CVE-2026-20347 ( NVD ):  7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  * CVE-2026-20348 ( SUSE ):  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
  * CVE-2026-20348 ( SUSE ):  7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  * CVE-2026-20348 ( NVD ):  7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  * CVE-2026-46671 ( SUSE ):  4.4 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:L
  * CVE-2026-46671 ( NVD ):  4.4 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:L

  
Affected Products:

  * SUSE Linux Enterprise Server 16.0
  * SUSE Linux Enterprise Server for SAP applications 16.0

  
  
An update that solves nine vulnerabilities can now be installed.

## Description:

This update for clamav fixes the following issues:

  * CVE-2026-20337: Improper boundary checks for content in zip archive parser
    (bsc#1274597).
  * CVE-2026-20338: invalid free due to bad ownership handling when merging ZIP
    catalogue records (bsc#1274598).
  * CVE-2026-20339: integer overflow in the PESpin unpacker leads to undersized
    allocation and heap out-of-bounds write (bsc#1274599).
  * CVE-2026-20345: out-of-bounds read/write via indexing error when converting
    GPT partition names (bsc#1274600).
  * CVE-2026-20346: integer underflow when parsing malformed PDF hex strings
    causes a crash (bsc#1274601).
  * CVE-2026-20347: integer overflow and undefined behavior when scanning
    malformed Mach-O files causes a crash (bsc#1274602).
  * CVE-2026-20348: improper size handling in the XAR parser allows excessive
    allocation and scan-limit bypass (bsc#1274603).
  * CVE-2026-46671: onenote_parser: Path traversal in `Parser:parse_notebook`
    allows reading files outside the notebook directory (bsc#1271922).
  * CVE-2025-8088: rejects path separators in NTFS alternate data stream names
    to prevent extraction outside ClamAV's temporary scan directory on Windows.

Changes for clamav:

Update to 1.5.4:

  * Fixed thread-safety issues in the clamd STATS command that could disclose
    process memory or crash the daemon while scans and STATS requests run
    concurrently. Also fixed partial socket-write handling used for large STATS
    responses.
  * FreeBSD: Restored support for safe quarantine move and remove actions while
    preserving protection against source-path replacement races.
  * Fixed an OpenSSL library-context leak in legacy hashing helpers when a
    requested message digest cannot be fetched, such as when the default
    provider is unavailable in a FIPS-enabled environment.
  * Upgraded the Rust crossbeam-epoch dependency to resolve the
    RUSTSEC-2026-0204 advisory.

## Patch Instructions:

To install this SUSE update use the SUSE recommended installation methods like
YaST online_update or "zypper patch".  
Alternatively you can run the command listed for your product:

  * SUSE Linux Enterprise Server for SAP applications 16.0  
    zypper in -t patch SUSE-SLES-16.0-1660

  * SUSE Linux Enterprise Server 16.0  
    zypper in -t patch SUSE-SLES-16.0-1660

## Package List:

  * SUSE Linux Enterprise Server for SAP applications 16.0 (ppc64le x86_64)
    * clamav-milter-debuginfo-1.5.4-160000.1.1
    * clamav-milter-1.5.4-160000.1.1
    * clamav-devel-1.5.4-160000.1.1
    * clamav-debuginfo-1.5.4-160000.1.1
    * libclammspack0-1.5.4-160000.1.1
    * libfreshclam4-1.5.4-160000.1.1
    * libclammspack0-debuginfo-1.5.4-160000.1.1
    * libfreshclam4-debuginfo-1.5.4-160000.1.1
    * libclamav12-debuginfo-1.5.4-160000.1.1
    * clamav-debugsource-1.5.4-160000.1.1
    * libclamav12-1.5.4-160000.1.1
    * clamav-1.5.4-160000.1.1
  * SUSE Linux Enterprise Server for SAP applications 16.0 (noarch)
    * clamav-docs-html-1.5.4-160000.1.1
  * SUSE Linux Enterprise Server 16.0 (aarch64 ppc64le s390x x86_64)
    * clamav-milter-debuginfo-1.5.4-160000.1.1
    * clamav-milter-1.5.4-160000.1.1
    * clamav-devel-1.5.4-160000.1.1
    * clamav-debuginfo-1.5.4-160000.1.1
    * libclammspack0-1.5.4-160000.1.1
    * libfreshclam4-1.5.4-160000.1.1
    * libclammspack0-debuginfo-1.5.4-160000.1.1
    * libfreshclam4-debuginfo-1.5.4-160000.1.1
    * libclamav12-debuginfo-1.5.4-160000.1.1
    * clamav-debugsource-1.5.4-160000.1.1
    * libclamav12-1.5.4-160000.1.1
    * clamav-1.5.4-160000.1.1
  * SUSE Linux Enterprise Server 16.0 (noarch)
    * clamav-docs-html-1.5.4-160000.1.1

## References:

  * https://www.suse.com/security/cve/CVE-2025-8088.html
  * https://www.suse.com/security/cve/CVE-2026-20337.html
  * https://www.suse.com/security/cve/CVE-2026-20338.html
  * https://www.suse.com/security/cve/CVE-2026-20339.html
  * https://www.suse.com/security/cve/CVE-2026-20345.html
  * https://www.suse.com/security/cve/CVE-2026-20346.html
  * https://www.suse.com/security/cve/CVE-2026-20347.html
  * https://www.suse.com/security/cve/CVE-2026-20348.html
  * https://www.suse.com/security/cve/CVE-2026-46671.html
  * https://bugzilla.suse.com/show_bug.cgi?id=1271922
  * https://bugzilla.suse.com/show_bug.cgi?id=1274597
  * https://bugzilla.suse.com/show_bug.cgi?id=1274598
  * https://bugzilla.suse.com/show_bug.cgi?id=1274599
  * https://bugzilla.suse.com/show_bug.cgi?id=1274600
  * https://bugzilla.suse.com/show_bug.cgi?id=1274601
  * https://bugzilla.suse.com/show_bug.cgi?id=1274602
  * https://bugzilla.suse.com/show_bug.cgi?id=1274603

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