CVE-2021-3655: debian debian_linux Missing Initialization of Resource

Modified

AliasesUBUNTU-CVE-2021-3655DEBIAN-CVE-2021-3655

Published 05-08-2021Last modified 08-10-2026

Vulnerability summary

CVE-2021-3655 is a low (CVSS 3.3) Missing Initialization of Resource vulnerability in debian debian_linux. EPSS estimates a 0.31% chance of exploitation in the next 30 days, higher than 23.6% of scored vulnerabilities.

Priority

Routine

Not severe (CVSS 3.3, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?

CVSS score

3.3/10

010

Low · v3.1 (NVD)

EPSS score

0.31%

0%100%

Low · 0.00 pp in 30 days

KEVNot listedNot listed by any tracked catalog.

RansomwareNot flaggedNo ransomware use recorded.

Public exploits0No public exploits recorded

Timeline

05-08-2021
PublishedVulnerability first disclosed.
08-10-2026
Last modifiedVulnerability information updated.

Description

A vulnerability was found in the Linux kernel in versions prior to v5.14-rc1. Missing size validations on inbound SCTP packets may allow the kernel to read uninitialized memory.

CVSS metrics

4 scores · 3 sources · 2 versions

v3.13.3v2.02.1

EPSS trend

Probability

0.31%

Chance of exploitation in the next 30 days

Percentile

24%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.31% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs

CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu64 products

linuxAll versions (No fix recorded) | < 4.15.0-162.170 | < 5.4.0-91.102
linux-awsAll versions (No fix recorded) | < 4.15.0-1115.122 | < 5.4.0-1060.63
linux-aws-5.0All versions (No fix recorded)
linux-aws-5.11< 5.11.0-1022.23~20.04.1
linux-aws-5.3All versions (No fix recorded)

linux-aws-5.4< 5.4.0-1060.63~18.04.1
linux-aws-5.8All versions (No fix recorded)
linux-aws-fips< 4.15.0-2056.58 | All versions (No fix recorded) | < 5.4.0-1069.73+fips2
linux-aws-hwe< 4.15.0-1115.122~16.04.1
linux-azure< 4.15.0-1126.139~14.04.1 | < 4.15.0-1126.139~16.04.1 | All versions (No fix recorded) | < 5.4.0-1064.67
linux-azure-4.15< 4.15.0-1126.139
linux-azure-5.11< 5.11.0-1022.23~20.04.1
linux-azure-5.3All versions (No fix recorded)
linux-azure-5.4< 5.4.0-1064.67~18.04.1
linux-azure-5.8All versions (No fix recorded)
linux-azure-edgeAll versions (No fix recorded)
linux-azure-fde-5.15< 5.15.0-1114.123~20.04.1
linux-azure-fips< 4.15.0-2038.42 | All versions (No fix recorded) | < 5.4.0-1073.76+fips1
linux-bluefield< 5.4.0-1022.25
linux-dell300x< 4.15.0-1030.35
linux-fipsAll versions (No fix recorded) | < 4.15.0-1072.81 | < 5.4.0-1037.43
linux-gcp< 4.15.0-1111.125~16.04.1 | All versions (No fix recorded) | < 5.4.0-1058.62
linux-gcp-4.15< 4.15.0-1111.125
linux-gcp-5.11< 5.11.0-1023.25~20.04.1
linux-gcp-5.3All versions (No fix recorded)
linux-gcp-5.4< 5.4.0-1058.62~18.04.1
linux-gcp-5.8All versions (No fix recorded)
linux-gcp-edgeAll versions (No fix recorded)
linux-gcp-fips< 4.15.0-2021.23 | All versions (No fix recorded) | < 5.4.0-1067.71~20.04.1
linux-gke< 5.4.0-1056.59
linux-gke-4.15All versions (No fix recorded)
linux-gke-5.4< 5.4.0-1056.59~18.04.1
linux-gkeop< 5.4.0-1027.28
linux-gkeop-5.4< 5.4.0-1027.28~18.04.1
linux-hwe< 4.15.0-162.170~16.04.1 | All versions (No fix recorded)
linux-hwe-5.11< 5.11.0-41.45~20.04.1
linux-hwe-5.13< 5.13.0-22.22~20.04.1
linux-hwe-5.4< 5.4.0-91.102~18.04.1
linux-hwe-5.8All versions (No fix recorded)
linux-hwe-edgeAll versions (No fix recorded)
linux-ibm< 5.4.0-1008.9
linux-intel-5.13All versions (No fix recorded)
linux-intel-iot-realtimeAll versions (No fix recorded)
linux-kvmAll versions (No fix recorded) | < 4.15.0-1102.104 | < 5.4.0-1050.52
linux-lts-xenialAll versions (No fix recorded)
linux-oemAll versions (No fix recorded)
linux-oem-5.10< 5.10.0-1051.53
linux-oem-5.13< 5.13.0-1020.24
linux-oem-5.6All versions (No fix recorded)
linux-oracle< 4.15.0-1083.91~16.04.1 | < 4.15.0-1083.91 | < 5.4.0-1058.62
linux-oracle-5.0All versions (No fix recorded)
linux-oracle-5.11< 5.11.0-1022.23~20.04.1
linux-oracle-5.3All versions (No fix recorded)
linux-oracle-5.4< 5.4.0-1058.62~18.04.1
linux-oracle-5.8All versions (No fix recorded)
linux-raspi< 5.4.0-1047.52
linux-raspi-5.4< 5.4.0-1047.52~18.04.1
linux-raspi-realtimeAll versions (No fix recorded)
linux-raspi2< 4.15.0-1098.104 | All versions (No fix recorded)
linux-realtimeAll versions (No fix recorded)
linux-riscvAll versions (No fix recorded)
linux-riscv-5.11< 5.11.0-1023.24~20.04.1
linux-riscv-5.8All versions (No fix recorded)
linux-snapdragon< 4.15.0-1115.124