{"id":"CVE-2025-20260","aliases":["ALPINE-CVE-2025-20260","AZL-64208","AZL-64223","CLSA-2025-1756202550","CLSA-2025-1756409595","CLSA-2025-1756923561","DEBIAN-CVE-2025-20260","DLA-4292-1","EUVD-2025-18658","GHSA-596c-w2jc-jmmx","MGASA-2025-0190","OESA-2025-1693","OESA-2025-1694","OESA-2025-1695","OESA-2025-1696","OESA-2025-1763","SUSE-SU-2025:02119-1","SUSE-SU-2025:02200-1","SUSE-SU-2025:02201-1","UBUNTU-CVE-2025-20260","USN-7615-1","USN-7615-2","openSUSE-SU-2025:15211-1"],"status":"published","title":"ClamAV PDF Scanning Buffer Overflow Vulnerability","description":"A vulnerability in the PDF scanning processes of ClamAV could allow an unauthenticated, remote attacker to cause a buffer overflow condition, cause a denial of service (DoS) condition, or execute arbitrary code on an affected device.\r\n\r\nThis vulnerability exists because memory buffers are allocated incorrectly when PDF files are processed. An attacker could exploit this vulnerability by submitting a crafted PDF file to be scanned by ClamAV on an affected device. A successful exploit could allow the attacker to trigger a buffer overflow, likely resulting in the termination of the ClamAV scanning process and a DoS condition on the affected software. Although unproven, there is also a possibility that an attacker could leverage the buffer overflow to execute arbitrary code with the privileges of the ClamAV process.","severity":{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.01643,"percentile":0.76624,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":true,"fix_available":true},"cwes":["CWE-122"],"published":"2025-06-18T17:08:36Z","modified":"2026-11-03T22:02:52Z","exploits":[{"source":"pocgithub","id":"Alex-Acero-Security/CVE-2025-20260-POC","title":"Alex-Acero-Security/CVE-2025-20260-POC","date":"2025-10-27","url":"https://github.com/Alex-Acero-Security/CVE-2025-20260-POC"},{"source":"pocgithub","id":"keyuraghao/CVE-2025-20260","title":"keyuraghao/CVE-2025-20260","date":"2025-11-13","url":"https://github.com/keyuraghao/CVE-2025-20260"}],"fixes":[{"ecosystem":"Alpine:v3.22","package":"clamav","fixed_in":["1.4.3-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.23","package":"clamav","fixed_in":["1.4.3-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.24","package":"clamav","fixed_in":["1.4.3-r0"],"sources":["osv"]},{"ecosystem":"Azure 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Advisory","advisory","web","report"]},{"url":"https://lists.debian.org/debian-lts-announce/2025/09/msg00006.html","tags":["web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2025-20260","tags":["web","advisory"]},{"url":"https://github.com/advisories/GHSA-596c-w2jc-jmmx"},{"url":"https://security.alpinelinux.org/vuln/CVE-2025-20260","tags":["advisory"]},{"url":"https://errata.tuxcare.com/els_os/ubuntu18.04els/CLSA-2025-1756202550.html","tags":["advisory"]},{"url":"https://errata.tuxcare.com/els_os/centos7els/CLSA-2025-1756409595.html","tags":["advisory"]},{"url":"https://errata.tuxcare.com/els_os/centos6els/CLSA-2025-1756923561.html","tags":["advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2025-20260","tags":["advisory"]},{"url":"https://advisories.mageia.org/MGASA-2025-0190.html","tags":["advisory"]},{"url":"https://bugs.mageia.org/show_bug.cgi?id=34387","tags":["report"]},{"url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2025-1693","tags":["advisory"]},{"url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2025-1694","tags":["advisory"]},{"url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2025-1695","tags":["advisory"]},{"url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2025-1696","tags":["advisory"]},{"url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2025-1763","tags":["advisory"]},{"url":"https://www.suse.com/support/update/announcement/2025/suse-su-202502119-1/","tags":["advisory"]},{"url":"https://bugzilla.suse.com/1243565","tags":["report"]},{"url":"https://bugzilla.suse.com/1245054","tags":["report"]},{"url":"https://bugzilla.suse.com/1245055","tags":["report"]},{"url":"https://www.suse.com/security/cve/CVE-2025-20234","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2025-20260","tags":["web"]},{"url":"https://www.suse.com/support/update/announcement/2025/suse-su-202502200-1/","tags":["advisory"]},{"url":"https://www.suse.com/support/update/announcement/2025/suse-su-202502201-1/","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2025-20260","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2025-20260","tags":["report"]},{"url":"https://ubuntu.com/security/notices/USN-7615-1","tags":["advisory"]},{"url":"https://ubuntu.com/security/notices/USN-7615-2","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2025-20234","tags":["report"]},{"url":"","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2025-20260","title":"ClamAV PDF Scanning Buffer Overflow Vulnerability","description":"A vulnerability in the PDF scanning processes of ClamAV could allow an unauthenticated, remote attacker to cause a buffer overflow condition, cause a denial of service (DoS) condition, or execute arbitrary code on an affected device.\r\n\r\nThis vulnerability exists because memory buffers are allocated incorrectly when PDF files are processed. An attacker could exploit this vulnerability by submitting a crafted PDF file to be scanned by ClamAV on an affected device. A successful exploit could allow the attacker to trigger a buffer overflow, likely resulting in the termination of the ClamAV scanning process and a DoS condition on the affected software. Although unproven, there is also a possibility that an attacker could leverage the buffer overflow to execute arbitrary code with the privileges of the ClamAV process.","status":"published","published":"2025-06-18T17:08:36.207Z","modified":"2026-11-03T22:02:52.793Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"cna"}],"cwes":["CWE-122"],"updated_at":"2026-11-03T23:33:08.294318Z"}],"euvd":[{"id":"EUVD-2025-18658","description":"A vulnerability in the PDF scanning processes of ClamAV could allow an unauthenticated, remote attacker to cause a buffer overflow condition, cause a denial of service (DoS) condition, or execute arbitrary code on an affected device.\r\n\r\nThis vulnerability exists because memory buffers are allocated incorrectly when PDF files are processed. An attacker could exploit this vulnerability by submitting a crafted PDF file to be scanned by ClamAV on an affected device. A successful exploit could allow the attacker to trigger a buffer overflow, likely resulting in the termination of the ClamAV scanning process and a DoS condition on the affected software. Although unproven, there is also a possibility that an attacker could leverage the buffer overflow to execute arbitrary code with the privileges of the ClamAV process.","status":"published","published":"2025-06-18T17:08:36Z","modified":"2026-11-03T22:02:52Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-03T23:01:35.361827Z"}],"ghsa":[{"id":"GHSA-596c-w2jc-jmmx","title":"A vulnerability in the PDF scanning processes of ClamAV could allow an unauthenticated, remote...","description":"A vulnerability in the PDF scanning processes of ClamAV could allow an unauthenticated, remote attacker to cause a buffer overflow condition, cause a denial of service (DoS) condition, or execute arbitrary code on an affected device.\n\nThis vulnerability exists because memory buffers are allocated incorrectly when PDF files are processed. An attacker could exploit this vulnerability by submitting a crafted PDF file to be scanned by ClamAV on an affected device. A successful exploit could allow the attacker to trigger a buffer overflow, likely resulting in the termination of the ClamAV scanning process and a DoS condition on the affected software. Although unproven, there is also a possibility that an attacker could leverage the buffer overflow to execute arbitrary code with the privileges of the ClamAV process.","status":"published","published":"2025-06-18T18:30:33Z","modified":"2025-11-03T21:34:05Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"cwes":["CWE-122"],"updated_at":"2026-11-02T15:04:23.26783Z"}],"nvd":[{"id":"CVE-2025-20260","description":"A vulnerability in the PDF scanning processes of ClamAV could allow an unauthenticated, remote attacker to cause a buffer overflow condition, cause a denial of service (DoS) condition, or execute arbitrary code on an affected device.\r\n\r\nThis vulnerability exists because memory buffers are allocated incorrectly when PDF files are processed. An attacker could exploit this vulnerability by submitting a crafted PDF file to be scanned by ClamAV on an affected device. A successful exploit could allow the attacker to trigger a buffer overflow, likely resulting in the termination of the ClamAV scanning process and a DoS condition on the affected software. Although unproven, there is also a possibility that an attacker could leverage the buffer overflow to execute arbitrary code with the privileges of the ClamAV process.","status":"published","published":"2025-06-18T18:15:23.27Z","modified":"2026-06-17T08:41:12.96Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"secondary"}],"cwes":["CWE-122"],"updated_at":"2026-11-02T14:11:13.247441Z"}],"osv":[{"id":"ALPINE-CVE-2025-20260","description":"A vulnerability in the PDF scanning processes of ClamAV could allow an unauthenticated, remote attacker to cause a buffer overflow condition, cause a denial of service (DoS) condition, or execute arbitrary code on an affected device.\r\n\r\nThis vulnerability exists because memory buffers are allocated incorrectly when PDF files are processed. An attacker could exploit this vulnerability by submitting a crafted PDF file to be scanned by ClamAV on an affected device. A successful exploit could allow the attacker to trigger a buffer overflow, likely resulting in the termination of the ClamAV scanning process and a DoS condition on the affected software. Although unproven, there is also a possibility that an attacker could leverage the buffer overflow to execute arbitrary code with the privileges of the ClamAV process.","status":"published","published":"2025-06-18T18:15:23.27Z","modified":"2026-11-03T06:33:00.295496618Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-03T07:16:09.603409Z"},{"id":"CVE-2025-20260","description":"A vulnerability in the PDF scanning processes of ClamAV could allow an unauthenticated, remote attacker to cause a buffer overflow condition, cause a denial of service (DoS) condition, or execute arbitrary code on an affected device.\r\n\r\nThis vulnerability exists because memory buffers are allocated incorrectly when PDF files are processed. An attacker could exploit this vulnerability by submitting a crafted PDF file to be scanned by ClamAV on an affected device. A successful exploit could allow the attacker to trigger a buffer overflow, likely resulting in the termination of the ClamAV scanning process and a DoS condition on the affected software. Although unproven, there is also a possibility that an attacker could leverage the buffer overflow to execute arbitrary code with the privileges of the ClamAV process.","status":"published","published":"2025-06-18T18:15:23.27Z","modified":"2026-10-24T15:08:03.448484967Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T15:44:46.665428Z"},{"id":"DEBIAN-CVE-2025-20260","description":"A vulnerability in the PDF scanning processes of ClamAV could allow an unauthenticated, remote attacker to cause a buffer overflow condition, cause a denial of service (DoS) condition, or execute arbitrary code on an affected device.\r \r This vulnerability exists because memory buffers are allocated incorrectly when PDF files are processed. An attacker could exploit this vulnerability by submitting a crafted PDF file to be scanned by ClamAV on an affected device. A successful exploit could allow the attacker to trigger a buffer overflow, likely resulting in the termination of the ClamAV scanning process and a DoS condition on the affected software. Although unproven, there is also a possibility that an attacker could leverage the buffer overflow to execute arbitrary code with the privileges of the ClamAV process.","status":"published","published":"2025-06-18T18:15:23.27Z","modified":"2026-09-01T20:05:41.740046793Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T15:45:45.102284Z"},{"id":"OESA-2025-1693","title":"clamav security update","description":"Clam AntiVirus is an anti-virus toolkit for UNIX. The main purpose of this\nsoftware is the integration with mail servers (attachment scanning). The\npackage provides a flexible and scalable multi-threaded daemon, a command\nline scanner, and a tool for automatic updating via Internet. The programs\nare based on a shared library distributed with the Clam AntiVirus package,\nwhich you can use with your own software. The virus database is based on\nthe virus database from OpenAntiVirus, but contains additional signatures\n(including signatures for popular polymorphic viruses, too) and is KEPT UP\nTO DATE.\r\n\r\nSecurity Fix(es):\n\nA vulnerability in the PDF scanning processes of ClamAV could allow an unauthenticated, remote attacker to cause a buffer overflow condition, cause a denial of service (DoS) condition, or execute arbitrary code on an affected device.\n\nThis vulnerability exists because memory buffers are allocated incorrectly when PDF files are processed. An attacker could exploit this vulnerability by submitting a crafted PDF file to be scanned by ClamAV on an affected device. A successful exploit could allow the attacker to trigger a buffer overflow, likely resulting in the termination of the ClamAV scanning process and a DoS condition on the affected software. Although unproven, there is also a possibility that an attacker could leverage the buffer overflow to execute arbitrary code with the privileges of the ClamAV process.(CVE-2025-20260)","status":"published","published":"2025-06-27T11:08:47Z","modified":"2026-08-18T01:18:01.409276438Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T15:52:42.714349Z"},{"id":"OESA-2025-1694","title":"clamav security update","description":"Clam AntiVirus is an anti-virus toolkit for UNIX. The main purpose of this\nsoftware is the integration with mail servers (attachment scanning). The\npackage provides a flexible and scalable multi-threaded daemon, a command\nline scanner, and a tool for automatic updating via Internet. The programs\nare based on a shared library distributed with the Clam AntiVirus package,\nwhich you can use with your own software. The virus database is based on\nthe virus database from OpenAntiVirus, but contains additional signatures\n(including signatures for popular polymorphic viruses, too) and is KEPT UP\nTO DATE.\r\n\r\nSecurity Fix(es):\n\nA vulnerability in the PDF scanning processes of ClamAV could allow an unauthenticated, remote attacker to cause a buffer overflow condition, cause a denial of service (DoS) condition, or execute arbitrary code on an affected device.\n\nThis vulnerability exists because memory buffers are allocated incorrectly when PDF files are processed. An attacker could exploit this vulnerability by submitting a crafted PDF file to be scanned by ClamAV on an affected device. A successful exploit could allow the attacker to trigger a buffer overflow, likely resulting in the termination of the ClamAV scanning process and a DoS condition on the affected software. Although unproven, there is also a possibility that an attacker could leverage the buffer overflow to execute arbitrary code with the privileges of the ClamAV process.(CVE-2025-20260)","status":"published","published":"2025-06-27T11:08:47Z","modified":"2026-08-18T01:18:01.376380145Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T15:52:42.714349Z"},{"id":"OESA-2025-1695","title":"clamav security update","description":"Clam AntiVirus is an anti-virus toolkit for UNIX. The main purpose of this\nsoftware is the integration with mail servers (attachment scanning). The\npackage provides a flexible and scalable multi-threaded daemon, a command\nline scanner, and a tool for automatic updating via Internet. The programs\nare based on a shared library distributed with the Clam AntiVirus package,\nwhich you can use with your own software. The virus database is based on\nthe virus database from OpenAntiVirus, but contains additional signatures\n(including signatures for popular polymorphic viruses, too) and is KEPT UP\nTO DATE.\r\n\r\nSecurity Fix(es):\n\nA vulnerability in the PDF scanning processes of ClamAV could allow an unauthenticated, remote attacker to cause a buffer overflow condition, cause a denial of service (DoS) condition, or execute arbitrary code on an affected device.\n\nThis vulnerability exists because memory buffers are allocated incorrectly when PDF files are processed. An attacker could exploit this vulnerability by submitting a crafted PDF file to be scanned by ClamAV on an affected device. A successful exploit could allow the attacker to trigger a buffer overflow, likely resulting in the termination of the ClamAV scanning process and a DoS condition on the affected software. Although unproven, there is also a possibility that an attacker could leverage the buffer overflow to execute arbitrary code with the privileges of the ClamAV process.(CVE-2025-20260)","status":"published","published":"2025-06-27T11:08:47Z","modified":"2026-08-18T01:18:51.720863502Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T15:52:42.714349Z"},{"id":"OESA-2025-1696","title":"clamav security update","description":"Clam AntiVirus is an anti-virus toolkit for UNIX. The main purpose of this\nsoftware is the integration with mail servers (attachment scanning). The\npackage provides a flexible and scalable multi-threaded daemon, a command\nline scanner, and a tool for automatic updating via Internet. The programs\nare based on a shared library distributed with the Clam AntiVirus package,\nwhich you can use with your own software. The virus database is based on\nthe virus database from OpenAntiVirus, but contains additional signatures\n(including signatures for popular polymorphic viruses, too) and is KEPT UP\nTO DATE.\r\n\r\nSecurity Fix(es):\n\nA vulnerability in the PDF scanning processes of ClamAV could allow an unauthenticated, remote attacker to cause a buffer overflow condition, cause a denial of service (DoS) condition, or execute arbitrary code on an affected device.\n\nThis vulnerability exists because memory buffers are allocated incorrectly when PDF files are processed. An attacker could exploit this vulnerability by submitting a crafted PDF file to be scanned by ClamAV on an affected device. A successful exploit could allow the attacker to trigger a buffer overflow, likely resulting in the termination of the ClamAV scanning process and a DoS condition on the affected software. Although unproven, there is also a possibility that an attacker could leverage the buffer overflow to execute arbitrary code with the privileges of the ClamAV process.(CVE-2025-20260)","status":"published","published":"2025-06-27T11:08:47Z","modified":"2026-08-18T01:18:01.886674692Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T15:52:42.714349Z"},{"id":"OESA-2025-1763","title":"clamav security update","description":"Clam AntiVirus is an anti-virus toolkit for UNIX. The main purpose of this\nsoftware is the integration with mail servers (attachment scanning). The\npackage provides a flexible and scalable multi-threaded daemon, a command\nline scanner, and a tool for automatic updating via Internet. The programs\nare based on a shared library distributed with the Clam AntiVirus package,\nwhich you can use with your own software. The virus database is based on\nthe virus database from OpenAntiVirus, but contains additional signatures\n(including signatures for popular polymorphic viruses, too) and is KEPT UP\nTO DATE.\r\n\r\nSecurity Fix(es):\n\nA vulnerability in the PDF scanning processes of ClamAV could allow an unauthenticated, remote attacker to cause a buffer overflow condition, cause a denial of service (DoS) condition, or execute arbitrary code on an affected device.\r\n\r\nThis vulnerability exists because memory buffers are allocated incorrectly when PDF files are processed. An attacker could exploit this vulnerability by submitting a crafted PDF file to be scanned by ClamAV on an affected device. A successful exploit could allow the attacker to trigger a buffer overflow, likely resulting in the termination of the ClamAV scanning process and a DoS condition on the affected software. Although unproven, there is also a possibility that an attacker could leverage the buffer overflow to execute arbitrary code with the privileges of the ClamAV process.(CVE-2025-20260)","status":"published","published":"2025-07-11T11:08:51Z","modified":"2026-08-18T01:18:52.460890021Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T15:52:43.127925Z"},{"id":"UBUNTU-CVE-2025-20260","description":"A vulnerability in the PDF scanning processes of ClamAV could allow an unauthenticated, remote attacker to cause a buffer overflow condition, cause a denial of service (DoS) condition, or execute arbitrary code on an affected device. This vulnerability exists because memory buffers are allocated incorrectly when PDF files are processed. An attacker could exploit this vulnerability by submitting a crafted PDF file to be scanned by ClamAV on an affected device. A successful exploit could allow the attacker to trigger a buffer overflow, likely resulting in the termination of the ClamAV scanning process and a DoS condition on the affected software. Although unproven, there is also a possibility that an attacker could leverage the buffer overflow to execute arbitrary code with the privileges of the ClamAV process.","status":"published","published":"2025-06-18T18:15:00Z","modified":"2026-04-22T15:33:18.181373Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T16:55:20.144818Z"},{"id":"AZL-64208","title":"CVE-2025-20260 affecting package clamav for versions less than 1.0.9-1","description":"A vulnerability in the PDF scanning processes of ClamAV could allow an unauthenticated, remote attacker to cause a buffer overflow condition, cause a denial of service (DoS) condition, or execute arbitrary code on an affected device.\r\n\r\nThis vulnerability exists because memory buffers are allocated incorrectly when PDF files are processed. An attacker could exploit this vulnerability by submitting a crafted PDF file to be scanned by ClamAV on an affected device. A successful exploit could allow the attacker to trigger a buffer overflow, likely resulting in the termination of the ClamAV scanning process and a DoS condition on the affected software. Although unproven, there is also a possibility that an attacker could leverage the buffer overflow to execute arbitrary code with the privileges of the ClamAV process.","status":"published","published":"2025-06-18T18:15:23Z","modified":"2026-04-21T04:32:19.569155Z","updated_at":"2026-11-02T15:28:07.805289Z"},{"id":"AZL-64223","title":"CVE-2025-20260 affecting package clamav for versions less than 1.0.9-1","description":"A vulnerability in the PDF scanning processes of ClamAV could allow an unauthenticated, remote attacker to cause a buffer overflow condition, cause a denial of service (DoS) condition, or execute arbitrary code on an affected device.\r\n\r\nThis vulnerability exists because memory buffers are allocated incorrectly when PDF files are processed. An attacker could exploit this vulnerability by submitting a crafted PDF file to be scanned by ClamAV on an affected device. A successful exploit could allow the attacker to trigger a buffer overflow, likely resulting in the termination of the ClamAV scanning process and a DoS condition on the affected software. Although unproven, there is also a possibility that an attacker could leverage the buffer overflow to execute arbitrary code with the privileges of the ClamAV process.","status":"published","published":"2025-06-18T18:15:23Z","modified":"2026-04-21T04:48:36.804803Z","updated_at":"2026-11-02T15:28:07.805289Z"},{"id":"CLSA-2025-1756202550","title":"Fix of 9 CVEs","description":"   * Update up to 1.4.3 LTS\n     - CVE-2025-20260\n     - CVE-2025-20234\n     - CVE-2025-20128\n     - CVE-2024-20505, CVE-2024-20506\n     - CVE-2023-20197\n     - CVE-2023-20212\n     - CVE-2023-20032\n     - CVE-2023-20052","status":"published","published":"2025-08-26T10:02:35Z","modified":"2026-06-04T10:04:10.772300369Z","updated_at":"2026-11-02T15:43:42.025438Z"},{"id":"CLSA-2025-1756409595","title":"clamav: Fix of 4 CVEs","description":"- Update to 1.4.3 LTS\n- CVE-2025-20260: Fixed a possible buffer overflow write bug in\n  the PDF file parser\n- CVE-2025-20234: Fixed a possible buffer overflow read bug in\n  the UDF file parser\n- CVE-2025-20128: Fixed a possible buffer overflow read bug in\n  the OLE2 file parser\n- CVE-2024-20506: Changed the logging module to disable following\n  symlinks on Linux and Unix systems so as to prevent an attacker\n  with existing access to the 'clamd' or 'freshclam' services from\n  using a symlink to corrupt system files","status":"published","published":"2025-08-28T19:33:18Z","modified":"2026-10-21T10:47:55.344470814Z","updated_at":"2026-11-02T15:43:42.025438Z"},{"id":"CLSA-2025-1756923561","title":"clamav: Fix of 8 CVEs","description":"- Update to 1.0.9 LTS version\n- CVE-2025-20260: Fixed a possible buffer overflow write bug in\n  the PDF file parser\n- CVE-2025-20128: Fixed a possible buffer overflow read bug in\n  the OLE2 file parser\n- CVE-2024-20506: Changed the logging module to disable following\n  symlinks on Linux and Unix systems so as to prevent an attacker\n  with existing access to the 'clamd' or 'freshclam' services from\n  using a symlink to corrupt system files\n- CVE-2024-20290: Fixed a possible heap overflow read bug in\n  the OLE2 file parser\n- CVE-2024-20328: Fixed a possible command injection in the\n  'VirusEvent' feature of the clamd service\n- CVE-2023-20197: Fixed a possible denial of service in the\n  HFS+ parser\n- CVE-2023-20212: Fixed a possible DoS in the AutoIT file\n  parser\n- CVE-2023-20052: Fixed a possible remote information leak\n  in the DMG file parser","status":"published","published":"2025-09-03T18:19:25Z","modified":"2026-10-21T10:47:48.42966016Z","updated_at":"2026-11-02T15:43:42.025438Z"},{"id":"DLA-4292-1","title":"clamav - security update","status":"published","published":"2025-09-04T00:00:00Z","modified":"2026-03-09T02:08:48.142941Z","updated_at":"2026-11-02T15:46:12.7027Z"},{"id":"MGASA-2025-0190","title":"Updated clamav packages fix security vulnerability","description":"Fixed a possible buffer overflow write bug in the PDF file parser that\ncould cause a denial-of-service (DoS) condition or enable remote code\nexecution. (CVE-2025-20260)\n","status":"published","published":"2025-06-25T05:31:45Z","modified":"2026-04-16T04:41:27.339101457Z","updated_at":"2026-11-02T15:49:43.178336Z"},{"id":"openSUSE-SU-2025:15211-1","title":"clamav-1.4.3-1.1 on GA media","description":"These are all security issues fixed in the clamav-1.4.3-1.1 package on the GA media of openSUSE Tumbleweed.","status":"published","published":"2025-07-03T00:00:00Z","modified":"2026-03-23T04:53:30.085985Z","updated_at":"2026-11-02T16:58:37.399567Z"},{"id":"SUSE-SU-2025:02119-1","title":"Security update for clamav","description":"This update for clamav fixes the following issues:\n\nClamAV version 1.4.3:\n\n- CVE-2025-20260: PDF Scanning Buffer Overflow Vulnerability (bsc#1245054).\n- CVE-2025-20234: Vulnerability in Universal Disk Format (UDF) processing (bsc#1245055).\n\nOther bugfixes:\n\n- Fix a race condition between the mockup servers started by different test cases in freshclam_test.py (bsc#1243565)\n","status":"published","published":"2025-06-26T08:21:39Z","modified":"2026-03-23T04:46:27.429005Z","updated_at":"2026-11-02T15:53:56.647031Z"},{"id":"SUSE-SU-2025:02200-1","title":"Security update for clamav","description":"This update for clamav fixes the following issues:\n\nClamAV version 1.4.3:\n\n- CVE-2025-20260: PDF Scanning Buffer Overflow Vulnerability (bsc#1245054).\n- CVE-2025-20234: Vulnerability in Universal Disk Format (UDF) processing (bsc#1245055).\n","status":"published","published":"2025-07-02T13:03:38Z","modified":"2026-03-23T04:46:28.781605Z","updated_at":"2026-11-02T15:53:56.647031Z"},{"id":"SUSE-SU-2025:02201-1","title":"Security update for clamav","description":"This update for clamav fixes the following issues:\n\nClamAV version 1.4.3:\n\n- CVE-2025-20260: PDF Scanning Buffer Overflow Vulnerability (bsc#1245054).\n- CVE-2025-20234: Vulnerability in Universal Disk Format (UDF) processing (bsc#1245055).\n\nOther bugfixes:\n\n- Fix a race condition between the mockup servers started by different test cases in freshclam_test.py (bsc#1243565)\n","status":"published","published":"2025-07-02T13:04:36Z","modified":"2026-03-23T04:46:28.661086Z","updated_at":"2026-11-02T15:53:56.647031Z"},{"id":"USN-7615-1","title":"clamav vulnerabilities","description":"It was discovered that ClamAV incorrectly handled scanning UDF files. A\nremote attacker could possibly use this issue to cause ClamAV to crash,\nresulting in a denial of service. (CVE-2025-20234)\n\nIt was discovered that ClamAV incorrectly handled scanning PDF files. A\nremote attacker could use this issue to cause ClamAV to crash, resulting\nin a denial of service, or possibly execute arbitrary code.\n(CVE-2025-20260)","status":"published","published":"2025-07-02T12:46:18Z","modified":"2026-04-27T18:17:11.60280637Z","updated_at":"2026-11-02T16:58:19.988474Z"},{"id":"USN-7615-2","title":"clamav vulnerabilities","description":"USN-7615-1 fixed several vulnerabilities in ClamAV. This update provides\nthe corresponding update for Ubuntu 20.04 LTS.\n\nOriginal advisory details:\n\n It was discovered that ClamAV incorrectly handled scanning UDF files. A\n remote attacker could possibly use this issue to cause ClamAV to crash,\n resulting in a denial of service. (CVE-2025-20234)\n\n It was discovered that ClamAV incorrectly handled scanning PDF files. A\n remote attacker could use this issue to cause ClamAV to crash, resulting\n in a denial of service, or possibly execute arbitrary code.\n (CVE-2025-20260)\n","status":"published","published":"2025-07-07T09:59:07Z","modified":"2026-04-27T18:17:09.98424205Z","updated_at":"2026-11-02T16:58:19.988474Z"}]}}