Reference page — cumulative record through Monday, October 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.
CVE-2023-42755
Red Hat Red Hat Enterprise Linux 8 — Kernel: rsvp: out-of-bounds read in rsvp_classify()
AV AC PR UI S C I A CVSS EPSS %ile KEV
L L L N U N N H 5.5 .0041 33.9 —
AFFECTED
Product Versions Fixed
Red Hat Enterprise Linux 8 unspecified 0:4.18.0-553.rt7.342.el8_10
Red Hat Enterprise Linux 8 unspecified 0:4.18.0-553.el8_10
Red Hat Enterprise Linux 6 unspecified —
Red Hat Enterprise Linux 7 unspecified —
Red Hat Enterprise Linux 7 unspecified —
Red Hat Enterprise Linux 9 unspecified —
Red Hat Enterprise Linux 9 unspecified —
TIMELINE
Sep 13 Reserved by redhat
Oct 5 Published (CNA: redhat)
Oct 15 EXPLOIT PUBLISHED — CVE-2023-42755 (Red Hat Enterprise Linux 8). Public exploit reference added.
Oct 15 RESCORED — CVE-2023-42755 (Red Hat Enterprise Linux 8). CVSS 6.5 → 5.5 (NVD).
Description
A flaw was found in the IPv4 Resource Reservation Protocol (RSVP) classifier in the Linux kernel. The xprt pointer may go beyond the linear part of the skb, leading to an out-of-bounds read in the `rsvp_classify` function. This issue may allow a local user to crash the system and cause a denial of service.
Lifecycle
Complete event history — 4 events, chronological
| Date | Event | Detail |
|---|
| September 13, 2023 | Reserved | Reserved by redhat |
| October 5, 2023 | Published | Published (CNA: redhat) |
| October 15, 2026 | EXPLOIT PUBLISHED | EXPLOIT PUBLISHED — CVE-2023-42755 (Red Hat Enterprise Linux 8). Public exploit reference added. |
| October 15, 2026 | RESCORED | RESCORED — CVE-2023-42755 (Red Hat Enterprise Linux 8). CVSS 6.5 → 5.5 (NVD). |
Affected
Affected products and packages — 7 rows
| Vendor | Product / Package | Ecosystem | Version introduced | Fixed |
|---|
| Red Hat | Red Hat Enterprise Linux 8 | — | — | 0:4.18.0-553.rt7.342.el8_10 |
| Red Hat | Red Hat Enterprise Linux 8 | — | — | 0:4.18.0-553.el8_10 |
| Red Hat | Red Hat Enterprise Linux 6 | — | — | — |
| Red Hat | Red Hat Enterprise Linux 7 | — | — | — |
| Red Hat | Red Hat Enterprise Linux 7 | — | — | — |
| Red Hat | Red Hat Enterprise Linux 9 | — | — | — |
| Red Hat | Red Hat Enterprise Linux 9 | — | — | — |
About this page
This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2023-42755 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 Monday, October 19, 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.
