CVE-2021-3483: debian debian_linux Use After Free

Modified

AliasesUBUNTU-CVE-2021-3483DEBIAN-CVE-2021-3483

Published 17-05-2021Last modified 05-08-2026

Vulnerability summary

CVE-2021-3483 is a high (CVSS 7.8) Use After Free vulnerability in debian debian_linux. EPSS estimates a 0.36% chance of exploitation in the next 30 days, higher than 30.2% of scored vulnerabilities.

Priority

Routine

Not severe (CVSS 7.8, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?

CVSS score

7.8/10

010

High · v3.1 (NVD)

EPSS score

0.36%

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

17-05-2021
PublishedVulnerability first disclosed.
05-08-2026
Last modifiedVulnerability information updated.

Description

A flaw was found in the Nosy driver in the Linux kernel. This issue allows a device to be inserted twice into a doubly-linked list, leading to a use-after-free when one of these devices is removed. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability. Versions before kernel 5.12-rc6 are affected

CVSS metrics

4 scores · 3 sources · 2 versions

v3.17.8v2.04.6

EPSS trend

Probability

0.36%

Chance of exploitation in the next 30 days

Percentile

30%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.36% 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

CWE-416Use After FreeThe product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

Affected systems

Version check

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

Ubuntu50 products

linuxAll versions (No fix recorded) | < 4.4.0-219.252 | < 4.15.0-144.148 | < 5.4.0-74.83
linux-aws< 4.4.0-1099.104 | < 4.4.0-1135.149 | < 4.15.0-1103.110 | < 5.4.0-1049.51
linux-aws-5.0All versions (No fix recorded)
linux-aws-5.3All versions (No fix recorded)
linux-aws-5.4< 5.4.0-1049.51~18.04.1

linux-aws-fips< 4.15.0-2045.47 | All versions (No fix recorded) | < 5.4.0-1069.73+fips2
linux-aws-hwe< 4.15.0-1103.110~16.04.1
linux-azure< 4.15.0-1115.128~14.04.1 | < 4.15.0-1115.128~16.04.1 | All versions (No fix recorded) | < 5.4.0-1048.50
linux-azure-4.15< 4.15.0-1115.128
linux-azure-5.3All versions (No fix recorded)
linux-azure-5.4< 5.4.0-1048.50~18.04.1
linux-azure-edgeAll versions (No fix recorded)
linux-azure-fde-5.15< 5.15.0-1114.123~20.04.1
linux-azure-fips< 4.15.0-2027.30 | All versions (No fix recorded) | < 5.4.0-1073.76+fips1
linux-bluefield< 5.4.0-1012.15
linux-dell300x< 4.15.0-1022.26
linux-fips< 4.4.0-1069.75 | All versions (No fix recorded) | < 4.15.0-1060.68
linux-gcp< 4.15.0-1100.113~16.04.1 | All versions (No fix recorded) | < 5.4.0-1044.47
linux-gcp-4.15< 4.15.0-1100.113
linux-gcp-5.3All versions (No fix recorded)
linux-gcp-5.4< 5.4.0-1044.47~18.04.2
linux-gcp-edgeAll versions (No fix recorded)
linux-gcp-fipsAll versions (No fix recorded) | < 5.4.0-1067.71~20.04.1
linux-gke< 5.4.0-1044.46
linux-gke-4.15All versions (No fix recorded)
linux-gke-5.4< 5.4.0-1044.46~18.04.1
linux-gkeop< 5.4.0-1016.17
linux-gkeop-5.4< 5.4.0-1016.17~18.04.1
linux-hwe< 4.15.0-144.148~16.04.1 | All versions (No fix recorded)
linux-hwe-5.4< 5.4.0-74.83~18.04.1
linux-hwe-5.8< 5.8.0-55.62~20.04.1
linux-hwe-edgeAll versions (No fix recorded)
linux-intel-iot-realtimeAll versions (No fix recorded)
linux-kvm< 4.4.0-1100.109 | < 4.15.0-1092.94 | < 5.4.0-1040.41
linux-lts-xenial< 4.4.0-219.252~14.04.1
linux-oemAll versions (No fix recorded)
linux-oem-5.10< 5.10.0-1025.26
linux-oem-5.6All versions (No fix recorded)
linux-oracle< 4.15.0-1072.80~16.04.1 | < 4.15.0-1072.80 | < 5.4.0-1046.50
linux-oracle-5.0All versions (No fix recorded)
linux-oracle-5.3All versions (No fix recorded)
linux-oracle-5.4< 5.4.0-1046.50~18.04.2
linux-raspi< 5.4.0-1036.39
linux-raspi-5.4< 5.4.0-1036.39~18.04.1
linux-raspi-realtimeAll versions (No fix recorded)
linux-raspi2< 4.15.0-1086.91 | All versions (No fix recorded)
linux-realtimeAll versions (No fix recorded)
linux-riscvAll versions (No fix recorded)
linux-riscv-5.8< 5.8.0-26.28~20.04.1
linux-snapdragon< 4.15.0-1103.112

Show all 50

Netapp9 products

Show all 9

Debian2 products

linux< 5.10.28-1
debian_linuxEOL9.0

Linux2 products

kernel< 4.4.265 | ≥ 4.5, < 4.9.265 | ≥ 4.10, < 4.14.229 | ≥ 4.15, < 4.19.185 | ≥ 4.20, < 5.4.110 | ≥ 5.5, < 5.10.28 | ≥ 5.11, < 5.11.12
linux_kernel< 5.12 | 5.12:rc1 | 5.12:rc2 | 5.12:rc3 | 5.12:rc4 | 5.12:rc5

4 vendors · 63 products