The version of Tencent Linux installed on the remote TencentOS Server 4 host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the TSSA-2026:1017 advisory.

    Package updates are available for TencentOS Server 4 that fix the following vulnerabilities:

    CVE-2026-78002:
    A flaw was found in rsyslog. An unauthenticated remote attacker can trigger a heap buffer overflow in the     RainerScript `replace()` function by sending specially crafted syslog messages. This vulnerability arises     from an incorrect buffer size calculation during string replacement, causing memory corruption. Successful     exploitation can lead to a denial of service (DoS) for the affected system.

Tenable has extracted the preceding description block directly from the Tencent Linux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Redhat Enterprise Linux 9 host has packages installed that are affected by a vulnerability as referenced in the RHSA-2026:69540 advisory.

    The rsyslog packages provide an enhanced, multi-threaded syslog daemon. It supports MySQL, syslog/TCP, RFC     3195, permitted sender lists, filtering on any message part, and fine-grained control over output format.

    Security Fix(es):

    * rsyslog: rsyslog: Denial of service via heap buffer overflow in RainerScript replace() function     (CVE-2026-78002)

    For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and     other related information, refer to the CVE page(s) listed in the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote AlmaLinux 9 host has packages installed that are affected by a vulnerability as referenced in the ALSA-2026:69540 advisory.

    * rsyslog: rsyslog: Denial of service via heap buffer overflow in RainerScript replace() function     (CVE-2026-78002)

Tenable has extracted the preceding description block directly from the AlmaLinux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote AlmaLinux 10 host has packages installed that are affected by a vulnerability as referenced in the ALSA-2026:69541 advisory.

    * rsyslog: rsyslog: Denial of service via heap buffer overflow in RainerScript replace() function     (CVE-2026-78002)

Tenable has extracted the preceding description block directly from the AlmaLinux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The version of rsyslog installed on the remote host is prior to 8.24.0-57. It is, therefore, affected by a vulnerability as referenced in the ALAS2-2026-3904 advisory.

    A flaw was found in rsyslog. An unauthenticated remote attacker can trigger a heap buffer overflow in the     RainerScript `replace()` function by sending specially crafted syslog messages. This vulnerability arises     from an incorrect buffer size calculation during string replacement, causing memory corruption. Successful     exploitation can lead to a denial of service (DoS) for the affected system. (CVE-2026-78002)

Tenable has extracted the preceding description block directly from the tested product security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS / 22.04 LTS / 24.04 LTS / 26.04 LTS host has packages installed that are affected by a vulnerability as referenced in the USN-8786-1 advisory.

    It was discovered that rsyslog incorrectly calculated buffer sizes when replacing strings. A remote     attacker could possibly use this issue to cause rsyslog to crash, resulting in a denial of service.

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The Rocky Linux 9 host has packages installed that are affected by a vulnerability as referenced in the CIQ crlsa-2026_69540 advisory.

    * rsyslog: rsyslog: Denial of service via heap buffer overflow in RainerScript replace() function     (CVE-2026-78002)

Tenable has extracted the preceding description block directly from the CIQ security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Oracle Linux 9 host has packages installed that are affected by a vulnerability as referenced in the ELSA-2026-69540 advisory.

    - Fix CVE-2026-78002: heap buffer overflow in RainerScript replace() function       Resolves: RHEL-246641

Tenable has extracted the preceding description block directly from the Oracle Linux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The Rocky Linux 8.6 host has packages installed that are affected by multiple vulnerabilities as referenced in the CIQ ciqsa-2026_1510 advisory.

    This advisory aggregates security fixes for the rsyslog SRPM in CIQ LTS 8.6. It addresses 2 CVEs:
    CVE-2022-24903, CVE-2026-78002.

Tenable has extracted the preceding description block directly from the CIQ security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The AlmaLinux 9.6 host has packages installed that are affected by a vulnerability as referenced in the TuxCare ALMALINUX9.6:CLSA-2026:1790795134 advisory.

  - A flaw was found in rsyslog. An unauthenticated remote attacker can trigger a heap buffer overflow in the     RainerScript `replace()` function by sending specially crafted syslog messages. This vulnerability arises     from an incorrect buffer size calculation during string replacement, causing memory corruption. Successful     exploitation can lead to a denial of service (DoS) for the affected system. (CVE-2026-78002)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The Rocky Linux 9.6 host has packages installed that are affected by a vulnerability as referenced in the TuxCare ALMALINUX9.6:CLSA-2026:1790795134 advisory.

  - A flaw was found in rsyslog. An unauthenticated remote attacker can trigger a heap buffer overflow in the     RainerScript `replace()` function by sending specially crafted syslog messages. This vulnerability arises     from an incorrect buffer size calculation during string replacement, causing memory corruption. Successful     exploitation can lead to a denial of service (DoS) for the affected system. (CVE-2026-78002)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

ID	名稱	產品	系列	已發布	已更新	嚴重性
348668	TencentOS Server 4: rsyslog (TSSA-2026:1017)	Nessus	Tencent Local Security Checks	2026/9/21	2026/9/21	high
348718	RHEL 9 : rsyslog (RHSA-2026:69540)	Nessus	Red Hat Local Security Checks	2026/9/22	2026/9/22	high
348738	AlmaLinux 9 : rsyslog (ALSA-2026:69540)	Nessus	Alma Linux Local Security Checks	2026/9/22	2026/9/22	high
348817	AlmaLinux 10 : rsyslog (ALSA-2026:69541)	Nessus	Alma Linux Local Security Checks	2026/9/22	2026/9/22	high
345773	Amazon Linux 2 : rsyslog (ALAS-2026-3904)	Nessus	Amazon Linux Local Security Checks	2026/9/14	2026/9/14	high
350293	Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS / 22.04 LTS / 24.04 LTS / 26.04 LTS : rsyslog vulnerability (USN-8786-1)	Nessus	Ubuntu Local Security Checks	2026/9/25	2026/9/25	high
355573	Rocky Linux 9 [CIQ] Security Update: rsyslog / rsyslog-crypto / rsyslog-crypto-debuginfo / etc (crlsa-2026_69540)	Nessus	Rocky Linux Local Security Checks	2026/10/1	2026/10/1	high
349133	Oracle Linux 9 : rsyslog (ELSA-2026-69540)	Nessus	Oracle Linux Local Security Checks	2026/9/23	2026/9/23	high
355410	Rocky Linux 8.6 [CIQ] Security Update: rsyslog / rsyslog-crypto / rsyslog-doc / rsyslog-elasticsearch / etc Multiple Vulnerabilities (ciqsa-2026_1510)	Nessus	Rocky Linux Local Security Checks	2026/10/1	2026/10/1	high
353334	AlmaLinux 9.6 [TuxCare] Security Update: rsyslog / rsyslog-crypto / rsyslog-doc / rsyslog-elasticsearch / etc (ALMALINUX9.6:CLSA-2026:1790795134)	Nessus	Alma Linux Local Security Checks	2026/9/30	2026/9/30	high
353340	Rocky Linux 9.6 [TuxCare] Security Update: rsyslog / rsyslog-crypto / rsyslog-doc / rsyslog-elasticsearch / etc (ALMALINUX9.6:CLSA-2026:1790795134)	Nessus	Rocky Linux Local Security Checks	2026/9/30	2026/9/30	high

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