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Affected Vendors & Products
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Solution
No solution given by the vendor.
Workaround
To mitigate this vulnerability, restrict network access to the rsyslog service to only trusted hosts. This can be achieved by configuring firewall rules to limit incoming connections to UDP and TCP port 514. Alternatively, if remote syslog reception is not required, disable the `imudp` and `imtcp` modules in the `/etc/rsyslog.conf` configuration file. After modifying the rsyslog configuration or firewall rules, the rsyslog service or firewall service must be restarted for the changes to take effect.
Thu, 27 Aug 2026 16:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | 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. | |
| Title | Rsyslog: rsyslog: denial of service via heap buffer overflow in rainerscript replace() function | |
| First Time appeared |
Redhat
Redhat enterprise Linux |
|
| Weaknesses | CWE-131 | |
| CPEs | cpe:/o:redhat:enterprise_linux:10 cpe:/o:redhat:enterprise_linux:6 cpe:/o:redhat:enterprise_linux:7 cpe:/o:redhat:enterprise_linux:8 cpe:/o:redhat:enterprise_linux:9 |
|
| Vendors & Products |
Redhat
Redhat enterprise Linux |
|
| References |
| |
| Metrics |
cvssV3_1
|
Projects
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Status: PUBLISHED
Assigner: redhat
Published:
Updated: 2026-08-27T16:12:59.102Z
Reserved: 2026-08-21T19:35:37.617Z
Link: CVE-2026-78002
No data.
Status : Received
Published: 2026-08-27T17:20:29.367
Modified: 2026-08-27T17:20:29.367
Link: CVE-2026-78002
No data.
OpenCVE Enrichment
No data.