CVE-2026-78002: Incorrect Calculation of Buffer Size in Red Hat Red Hat Enterprise Linux 10
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: Incorrect Calculation of Buffer Size in Red Hat Red Hat Enterprise Linux 10
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.
CVSS v3.1
Score 7.5high
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- redhat
- Date Reserved
- 2026-08-21T19:35:37.617Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
- Vendor Advisory Urls
- [{"url":"https://access.redhat.com/security/cve/CVE-2026-78002","vendor":"Red Hat"}]
Threat ID: 6a906bafacd9273b4983a0df
Added to database: 08/27/2026, 16:54:07 UTC
Last updated: 08/27/2026, 20:24:14 UTC
Views: 11
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