CVE-2023-42755

Kernel: rsvp: out-of-bounds read in rsvp_classify()

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

Red Hat · Red Hat Enterprise Linux 8 · Red Hat Enterprise Linux 6 · Red Hat Enterprise Linux 7

CVSS v3.1 NVD

5.5 MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS v3.1 REDHAT

6.5 MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H

EPSS

0.41% chance of exploitation in the next 30 days, 34th percentile

Published

2023-10-05

Updated

2026-10-14

Proof-of-concept exploits (1)

• https://seclists.org/oss-sec/2023/q3/229

Security advisories

• https://access.redhat.com/security/cve/CVE-2023-42755
• https://bugzilla.redhat.com/show_bug.cgi?id=2239847

References

• CVE Record
• NVD entry