CVE-2023-42755: debian debian_linux Out-of-bounds Read

CVSS: 6.5v3.1MediumModified

AliasesUBUNTU-CVE-2023-42755DEBIAN-CVE-2023-42755

Published 05-10-2023Last modified 14-10-2026

Vulnerability summary

CVE-2023-42755 is a medium (CVSS 6.5) Out-of-bounds Read vulnerability in debian debian_linux. EPSS estimates a 0.41% chance of exploitation in the next 30 days, higher than 33.9% of scored vulnerabilities. 1 public exploit is recorded.

Overall risk

36/100

0100

Medium · default modelHow is this calculated?

CVSS score

6.5/10

010

Medium · v3.1 (CVE.org)

EPSS score

0.41%

0%100%

Low · +0.01 pp in 30 days

KEVNot listedIn no KEV catalog

RansomwareNone recordedNo known use recorded

Public exploits1reference

Advisory lineage

Upstream 0 · Downstream 29 · Duplicates 1 · Related 25

Timeline

05-10-2023
PublishedVulnerability first disclosed.
14-10-2026
Last modifiedVulnerability information updated.

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.

CVSS metrics

4 scores · 4 sources · 1 version

v3.16.5

EPSS trend

Probability

0.41%

Chance of exploitation in the next 30 days

Percentile

34%

Versus all other CVEs

30-day change

+0.01 pp

From 0.40% on 18-09-2026

18-09-202618-10-2026

EPSS score

0.41%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

1 found

referenceUnverified
Exploit Reference (seclists.org)
Maturity: unknown

Weaknesses

CWE · root cause

CWE-125Out-of-bounds ReadThe product reads data past the end, or before the beginning, of the intended buffer.

Affected systems

Ubuntu106 products

linux< 3.13.0-194.245 | < 4.4.0-246.280 | < 4.15.0-219.230 | < 5.4.0-165.182 | < 5.15.0-87.97
linux-allwinner-5.19All versions (No fix recorded)
linux-aws< 4.4.0-1124.130 | < 4.4.0-1162.177 | < 4.15.0-1162.175 | < 5.4.0-1112.121 | < 5.15.0-1048.53
linux-aws-5.0All versions (No fix recorded)
linux-aws-5.11All versions (No fix recorded)

linux-aws-5.13All versions (No fix recorded)
linux-aws-5.15< 5.15.0-1048.53~20.04.1
linux-aws-5.19All versions (No fix recorded)
linux-aws-5.3All versions (No fix recorded)
linux-aws-5.4< 5.4.0-1112.121~18.04.2
linux-aws-5.8All versions (No fix recorded)
linux-aws-6.2< 6.2.0-1014.14~22.04.1
linux-aws-fips< 4.15.0-2101.107 | All versions (No fix recorded) | < 5.4.0-1112.121+fips1
linux-aws-hwe< 4.15.0-1162.175~16.04.1
linux-azure< 4.15.0-1171.186~14.04.1 | < 4.15.0-1171.186~16.04.1 | All versions (No fix recorded) | < 5.4.0-1118.125 | < 5.15.0-1050.57
linux-azure-4.15< 4.15.0-1171.186
linux-azure-5.11All versions (No fix recorded)
linux-azure-5.13All versions (No fix recorded)
linux-azure-5.15< 5.15.0-1050.57~20.04.1
linux-azure-5.19All versions (No fix recorded)
linux-azure-5.3All versions (No fix recorded)
linux-azure-5.4< 5.4.0-1118.125~18.04.1
linux-azure-5.8All versions (No fix recorded)
linux-azure-6.2< 6.2.0-1015.15~22.04.1
linux-azure-edgeAll versions (No fix recorded)
linux-azure-fdeAll versions (No fix recorded) | < 5.15.0-1050.57.1
linux-azure-fde-5.19All versions (No fix recorded)
linux-azure-fde-6.2< 6.2.0-1015.15~22.04.1.1
linux-azure-fips< 4.15.0-2080.86 | All versions (No fix recorded) | < 5.4.0-1118.125+fips1
linux-bluefield< 5.4.0-1073.79 | < 5.15.0-1028.30
linux-fips< 4.4.0-1094.101 | All versions (No fix recorded) | < 4.15.0-1117.128 | < 5.4.0-1087.96
linux-gcp< 4.15.0-1156.173~16.04.1 | All versions (No fix recorded) | < 5.4.0-1116.125 | < 5.15.0-1045.53
linux-gcp-4.15< 4.15.0-1156.173
linux-gcp-5.11All versions (No fix recorded)
linux-gcp-5.13All versions (No fix recorded)
linux-gcp-5.15< 5.15.0-1045.53~20.04.2
linux-gcp-5.19All versions (No fix recorded)
linux-gcp-5.3All versions (No fix recorded)
linux-gcp-5.4< 5.4.0-1116.125~18.04.1
linux-gcp-5.8All versions (No fix recorded)
linux-gcp-6.2< 6.2.0-1017.19~22.04.1
linux-gcp-fips< 4.15.0-2064.69 | All versions (No fix recorded) | < 5.4.0-1116.125+fips1
linux-gkeAll versions (No fix recorded) | < 5.15.0-1045.50
linux-gke-4.15All versions (No fix recorded)
linux-gke-5.15All versions (No fix recorded)
linux-gke-5.4All versions (No fix recorded)
linux-gkeop< 5.4.0-1079.83 | < 5.15.0-1031.37
linux-gkeop-5.15< 5.15.0-1031.37~20.04.1
linux-gkeop-5.4All versions (No fix recorded)
linux-hwe< 4.15.0-219.230~16.04.1 | All versions (No fix recorded)
linux-hwe-5.11All versions (No fix recorded)
linux-hwe-5.13All versions (No fix recorded)
linux-hwe-5.15< 5.15.0-87.97~20.04.1
linux-hwe-5.19All versions (No fix recorded)
linux-hwe-5.4< 5.4.0-165.182~18.04.1
linux-hwe-5.8All versions (No fix recorded)
linux-hwe-6.2< 6.2.0-35.35~22.04.1
linux-hwe-edgeAll versions (No fix recorded)
linux-ibm< 5.4.0-1059.64 | < 5.15.0-1041.44
linux-ibm-5.15< 5.15.0-1041.44~20.04.1
linux-ibm-5.4< 5.4.0-1059.64~18.04.1
linux-intel-5.13All versions (No fix recorded)
linux-intel-iot-realtime< 5.15.0-1041.43
linux-intel-iotg< 5.15.0-1043.49
linux-intel-iotg-5.15< 5.15.0-1043.49~20.04.1
linux-iot< 5.4.0-1024.25
linux-kvm< 4.4.0-1125.135 | < 4.15.0-1146.151 | < 5.4.0-1101.107 | < 5.15.0-1045.50
linux-lowlatency< 5.15.0-87.96
linux-lowlatency-hwe-5.15< 5.15.0-87.96~20.04.1
linux-lowlatency-hwe-5.19All versions (No fix recorded)
linux-lowlatency-hwe-6.2< 6.2.0-1015.15~22.04.1
linux-lts-xenial< 4.4.0-246.280~14.04.1
linux-nvidia< 5.15.0-1039.39
linux-nvidia-6.2< 6.2.0-1011.11
linux-nvidia-tegra< 5.15.0-1019.19
linux-nvidia-tegra-5.15< 5.15.0-1019.19~20.04.1
linux-nvidia-tegra-igx< 5.15.0-1006.6
linux-oemAll versions (No fix recorded)
linux-oem-5.10All versions (No fix recorded)
linux-oem-5.13All versions (No fix recorded)
linux-oem-5.14All versions (No fix recorded)
linux-oem-5.17All versions (No fix recorded)
linux-oem-5.6All versions (No fix recorded)
linux-oem-6.0All versions (No fix recorded)
linux-oem-6.1< 6.1.0-1024.24
linux-oracle< 4.15.0-1125.136~16.04.1 | < 4.15.0-1125.136 | < 5.4.0-1111.120 | < 5.15.0-1046.52
linux-oracle-5.0All versions (No fix recorded)
linux-oracle-5.11All versions (No fix recorded)
linux-oracle-5.13All versions (No fix recorded)
linux-oracle-5.15< 5.15.0-1046.52~20.04.1
linux-oracle-5.3All versions (No fix recorded)
linux-oracle-5.4< 5.4.0-1111.120~18.04.1
linux-oracle-5.8All versions (No fix recorded)
linux-raspi< 5.4.0-1096.107 | < 5.15.0-1041.44
linux-raspi-5.4< 5.4.0-1096.107~18.04.1
linux-raspi-realtimeAll versions (No fix recorded)
linux-raspi2All versions (No fix recorded)
linux-realtimeAll versions (No fix recorded) | < 5.15.0-1049.55
linux-riscvAll versions (No fix recorded)
linux-riscv-5.11All versions (No fix recorded)
linux-riscv-5.15< 5.15.0-1044.48~20.04.1
linux-riscv-5.19All versions (No fix recorded)
linux-riscv-5.8All versions (No fix recorded)
linux-starfive-5.19All versions (No fix recorded)
linux-starfive-6.2< 6.2.0-1007.8~22.04.1
linux-xilinx-zynqmp< 5.4.0-1032.36 | < 5.15.0-1025.29