CVE-2021-3679: debian debian_linux Uncontrolled Resource Consumption

Modified

AliasesUBUNTU-CVE-2021-3679DEBIAN-CVE-2021-3679

Published 05-08-2021Last modified 03-08-2024

Vulnerability summary

CVE-2021-3679 is a medium (CVSS 5.5) Uncontrolled Resource Consumption vulnerability in debian debian_linux. EPSS estimates a 0.75% chance of exploitation in the next 30 days, higher than 55% of scored vulnerabilities.

Priority

Routine

Not severe (CVSS 5.5, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?

CVSS score

5.5/10

010

Medium · v3.1 (NVD)

EPSS score

0.75%

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.
03-08-2024
Last modifiedVulnerability information updated.

Description

A lack of CPU resource in the Linux kernel tracing module functionality in versions prior to 5.14-rc3 was found in the way user uses trace ring buffer in a specific way. Only privileged local users (with CAP_SYS_ADMIN capability) could use this flaw to starve the resources causing denial of service.

CVSS metrics

4 scores · 3 sources · 2 versions

v3.15.5v2.02.1

EPSS trend

Probability

0.75%

Chance of exploitation in the next 30 days

Percentile

55%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.75% 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.

Ubuntu61 products

linuxAll versions (No fix recorded) | < 4.4.0-219.252 | < 4.15.0-159.167 | < 5.4.0-88.99
linux-aws< 4.4.0-1099.104 | < 4.4.0-1135.149 | < 4.15.0-1112.119 | < 5.4.0-1057.60
linux-aws-5.0All versions (No fix recorded)
linux-aws-5.11< 5.11.0-1019.20~20.04.1
linux-aws-5.3All versions (No fix recorded)

linux-aws-5.4< 5.4.0-1057.60~18.04.1
linux-aws-5.8All versions (No fix recorded)
linux-aws-fips< 4.15.0-2054.56 | All versions (No fix recorded) | < 5.4.0-1069.73+fips2
linux-aws-hwe< 4.15.0-1112.119~16.04.1
linux-azure< 4.15.0-1124.137~14.04.1 | < 4.15.0-1124.137~16.04.1 | All versions (No fix recorded) | < 5.4.0-1059.62
linux-azure-4.15< 4.15.0-1124.137
linux-azure-5.11< 5.11.0-1017.18~20.04.1
linux-azure-5.3All versions (No fix recorded)
linux-azure-5.4< 5.4.0-1059.62~18.04.1
linux-azure-5.8All versions (No fix recorded)
linux-azure-edgeAll versions (No fix recorded)
linux-azure-fips< 4.15.0-2036.40 | All versions (No fix recorded) | < 5.4.0-1073.76+fips1
linux-bluefield< 5.4.0-1019.22
linux-dell300x< 4.15.0-1028.33
linux-fips< 4.4.0-1069.75 | All versions (No fix recorded) | < 4.15.0-1070.79 | < 5.4.0-1034.40
linux-gcp< 4.15.0-1109.123~16.04.1 | All versions (No fix recorded) | < 5.4.0-1053.57
linux-gcp-4.15< 4.15.0-1109.123
linux-gcp-5.11< 5.11.0-1020.22~20.04.1
linux-gcp-5.3All versions (No fix recorded)
linux-gcp-5.4< 5.4.0-1053.57~18.04.1
linux-gcp-5.8All versions (No fix recorded)
linux-gcp-edgeAll versions (No fix recorded)
linux-gcp-fips< 4.15.0-2019.21 | All versions (No fix recorded) | < 5.4.0-1067.71~20.04.1
linux-gke< 5.4.0-1053.56
linux-gke-4.15All versions (No fix recorded)
linux-gke-5.4< 5.4.0-1053.56~18.04.1
linux-gkeop< 5.4.0-1024.25
linux-gkeop-5.4< 5.4.0-1024.25~18.04.1
linux-hwe< 4.15.0-159.167~16.04.1 | All versions (No fix recorded)
linux-hwe-5.11< 5.11.0-37.41~20.04.2
linux-hwe-5.4< 5.4.0-87.98~18.04.1
linux-hwe-5.8All versions (No fix recorded)
linux-hwe-edgeAll versions (No fix recorded)
linux-ibm< 5.4.0-1005.6
linux-intel-iot-realtimeAll versions (No fix recorded)
linux-kvm< 4.4.0-1100.109 | < 4.15.0-1100.102 | < 5.4.0-1047.49
linux-lts-xenial< 4.4.0-219.252~14.04.1
linux-oemAll versions (No fix recorded)
linux-oem-5.10< 5.10.0-1050.52
linux-oem-5.13< 5.13.0-1014.18
linux-oem-5.6All versions (No fix recorded)
linux-oracle< 4.15.0-1081.89~16.04.1 | < 4.15.0-1081.89 | < 5.4.0-1055.59
linux-oracle-5.0All versions (No fix recorded)
linux-oracle-5.11< 5.11.0-1019.20~20.04.1
linux-oracle-5.3All versions (No fix recorded)
linux-oracle-5.4< 5.4.0-1055.59~18.04.1
linux-oracle-5.8All versions (No fix recorded)
linux-raspi< 5.4.0-1044.48
linux-raspi-5.4< 5.4.0-1044.48~18.04.1
linux-raspi-realtimeAll versions (No fix recorded)
linux-raspi2< 4.15.0-1096.102 | All versions (No fix recorded)
linux-realtimeAll versions (No fix recorded)
linux-riscvAll versions (No fix recorded)
linux-riscv-5.11< 5.11.0-1020.21~20.04.1
linux-riscv-5.8All versions (No fix recorded)
linux-snapdragon< 4.15.0-1113.122