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.
CVSS Details
- CVSS 3.1 Base Score: 7.5
- CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Debian | — | Upgrade rsyslog | Sep 21, 2026 | Aug 27, 2026 |
| Redhat_linux | — | No solution exists | Aug 31, 2026 | Aug 26, 2026 |
| Ubuntu | — | Upgrade rsyslogUpgrade rsyslog (Ubuntu Pro) | Sep 21, 2026 | Aug 27, 2026 |
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