Rsyslog: rsyslog: denial of service via heap buffer overflow in rainerscript replace() function
Historical advisory recorded 5 Nov 2026 00:54:08 UTC. Read the latest advisory.
cve-program · CVE-2026-78002
PublishedA 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.
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cve-program · CVE-2026-78002
PublishedRsyslog: rsyslog: denial of service via heap buffer overflow in rainerscript replace() function
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.
- Source published
- 27 Aug 2026 16:12:59 UTC
- Source modified
- 4 Nov 2026 23:34:28 UTC
- Saved here
- 5 Nov 2026 00:54:08 UTC
- Source terms
- CVE Program Terms of Use
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Source: cve-program · CVE Program Terms of Use. The publisher's wording is preserved. ChangeIntel groups the information and labels changes. The JSON record includes additional source fields.
CVSS 3.1 · 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H