CVE-2023-42755: Debian Linux

Medium severity, CVSS 5.5. EPSS: 0.4% chance of exploitation in the next 30 days.

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.

Affected products

• Debian Debian Linux: version 10.0 only
• Linux Linux Kernel: before 6.3 (fixed in 6.3)
• Red Hat Enterprise Linux: version 8.0 only

Published 2023-10-05. Last modified 2026-06-17.