Reference page — cumulative record through Saturday, October 3, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.
CVE-2026-78002
Red Hat Red Hat Enterprise Linux 10 — Rsyslog: rsyslog: denial of service via heap buffer overflow in rainerscript replace() function
AV AC PR UI S C I A CVSS EPSS %ile KEV
N L N N U N N H 7.5 .0071 51.8 —
AFFECTED
Product Versions Fixed
Red Hat Enterprise Linux 10 unspecified 0:8.2510.0-5.el10_2.2
Red Hat Enterprise Linux 9 unspecified 0:8.2510.0-2.el9_8.2
Red Hat Update Infrastructure 5 unspecified 1790241900
Red Hat Enterprise Linux 6 unspecified —
Red Hat Enterprise Linux 6 unspecified —
Red Hat Enterprise Linux 7 unspecified —
Red Hat Enterprise Linux 8 unspecified —
TIMELINE
Aug 21 Reserved by redhat
Aug 27 Published (CNA: redhat)
Sep 21 PATCH SHIPPED — CVE-2026-78002 (Red Hat Enterprise Linux 10). Fixed in Red Hat Enterprise Linux 10 0:8.2510.0-5.el10_2.2.
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.
Lifecycle
Complete event history — 3 events, chronological
| Date | Event | Detail |
|---|
| August 21, 2026 | Reserved | Reserved by redhat |
| August 27, 2026 | Published | Published (CNA: redhat) |
| September 21, 2026 | PATCH SHIPPED | PATCH SHIPPED — CVE-2026-78002 (Red Hat Enterprise Linux 10). Fixed in Red Hat Enterprise Linux 10 0:8.2510.0-5.el10_2.2. |
Affected
Affected products and packages — 7 rows
| Vendor | Product / Package | Ecosystem | Version introduced | Fixed |
|---|
| Red Hat | Red Hat Enterprise Linux 10 | — | — | 0:8.2510.0-5.el10_2.2 |
| Red Hat | Red Hat Enterprise Linux 9 | — | — | 0:8.2510.0-2.el9_8.2 |
| Red Hat | Red Hat Update Infrastructure 5 | — | — | 1790241900 |
| Red Hat | Red Hat Enterprise Linux 6 | — | — | — |
| Red Hat | Red Hat Enterprise Linux 6 | — | — | — |
| Red Hat | Red Hat Enterprise Linux 7 | — | — | — |
| Red Hat | Red Hat Enterprise Linux 8 | — | — | — |
About this page
This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-78002 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Saturday, October 3, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.
