CVE-2021-3760: debian debian_linux Use After Free

Modified

AliasesUBUNTU-CVE-2021-3760DEBIAN-CVE-2021-3760

Published 16-02-2022Last modified 03-08-2024

Vulnerability summary

CVE-2021-3760 is a high (CVSS 7.8) Use After Free vulnerability in debian debian_linux. EPSS estimates a 0.35% chance of exploitation in the next 30 days, higher than 29.2% 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

0.35%

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

16-02-2022
PublishedVulnerability first disclosed.
03-08-2024
Last modifiedVulnerability information updated.

Description

A flaw was found in the Linux kernel. A use-after-free vulnerability in the NFC stack can lead to a threat to confidentiality, integrity, and system availability.

CVSS metrics

5 scores · 3 sources · 3 versions

v4.08.5v3.17.8v2.07.2

EPSS trend

Probability

0.35%

Chance of exploitation in the next 30 days

Percentile

29%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.35% 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 Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.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.

Ubuntu63 products

linux< 4.4.0-229.263 | < 4.15.0-166.174 | < 5.4.0-92.103
linux-aws< 4.4.0-1109.115 | < 4.4.0-1145.160 | < 4.15.0-1118.125 | < 5.4.0-1061.64
linux-aws-5.0All versions (No fix recorded)
linux-aws-5.11< 5.11.0-1023.24~20.04.1
linux-aws-5.3All versions (No fix recorded)

linux-aws-5.4< 5.4.0-1061.64~18.04.1
linux-aws-5.8All versions (No fix recorded)
linux-aws-fips< 4.15.0-2059.61 | All versions (No fix recorded) | < 5.4.0-1069.73+fips2
linux-aws-hwe< 4.15.0-1118.125~16.04.1
linux-azure< 4.15.0-1129.142~14.04.1 | < 4.15.0-1129.142~16.04.1 | All versions (No fix recorded) | < 5.4.0-1065.68
linux-azure-4.15< 4.15.0-1129.142
linux-azure-5.11< 5.11.0-1023.24~20.04.1
linux-azure-5.3All versions (No fix recorded)
linux-azure-5.4< 5.4.0-1065.68~18.04.1
linux-azure-5.8All versions (No fix recorded)
linux-azure-edgeAll versions (No fix recorded)
linux-azure-fips< 4.15.0-2041.45 | All versions (No fix recorded) | < 5.4.0-1073.76+fips1
linux-bluefield< 5.4.0-1023.26
linux-dell300x< 4.15.0-1033.38
linux-fips< 4.4.0-1079.86 | All versions (No fix recorded) | < 4.15.0-1075.84 | < 5.4.0-1038.44
linux-gcp< 4.15.0-1114.128~16.04.1 | All versions (No fix recorded) | < 5.4.0-1059.63
linux-gcp-4.15< 4.15.0-1114.128
linux-gcp-5.11< 5.11.0-1024.26~20.04.1
linux-gcp-5.3All versions (No fix recorded)
linux-gcp-5.4< 5.4.0-1059.63~18.04.1
linux-gcp-5.8All versions (No fix recorded)
linux-gcp-fips< 4.15.0-2024.26 | All versions (No fix recorded) | < 5.4.0-1067.71~20.04.1
linux-gke< 5.4.0-1057.60
linux-gke-4.15All versions (No fix recorded)
linux-gke-5.4< 5.4.0-1057.60~18.04.1
linux-gkeop< 5.4.0-1029.30
linux-gkeop-5.4< 5.4.0-1029.30~18.04.2
linux-hwe< 4.15.0-166.174~16.04.1 | All versions (No fix recorded)
linux-hwe-5.11< 5.11.0-44.48~20.04.2
linux-hwe-5.13< 5.13.0-23.23~20.04.2
linux-hwe-5.4< 5.4.0-92.103~18.04.2
linux-hwe-5.8All versions (No fix recorded)
linux-hwe-edgeAll versions (No fix recorded)
linux-ibm< 5.4.0-1010.11
linux-intel-5.13All versions (No fix recorded)
linux-intel-iot-realtimeAll versions (No fix recorded)
linux-kvm< 4.4.0-1110.120 | < 4.15.0-1105.107 | < 5.4.0-1051.53
linux-lts-xenial< 4.4.0-229.263~14.04.1
linux-oemAll versions (No fix recorded)
linux-oem-5.10< 5.10.0-1051.53
linux-oem-5.13< 5.13.0-1026.32
linux-oem-5.14< 5.14.0-1008.8
linux-oem-5.6All versions (No fix recorded)
linux-oracle< 4.15.0-1085.93~16.04.1 | < 4.15.0-1085.93 | < 5.4.0-1059.63
linux-oracle-5.0All versions (No fix recorded)
linux-oracle-5.11< 5.11.0-1023.24~20.04.1
linux-oracle-5.3All versions (No fix recorded)
linux-oracle-5.4< 5.4.0-1059.63~18.04.1
linux-oracle-5.8All versions (No fix recorded)
linux-raspi< 5.4.0-1048.53
linux-raspi-5.4< 5.4.0-1048.53~18.04.1
linux-raspi-realtimeAll versions (No fix recorded)
linux-raspi2< 4.15.0-1101.108 | All versions (No fix recorded)
linux-realtimeAll versions (No fix recorded)
linux-riscvAll versions (No fix recorded)
linux-riscv-5.11< 5.11.0-1024.25~20.04.1
linux-riscv-5.8All versions (No fix recorded)
linux-snapdragon< 4.15.0-1118.127

Show all 63

Netapp8 products

Show all 8

Debian2 products

linux< 5.14.16-1
debian_linuxEOL9.0

Fedoraproject1 product

fedoraEOL34

Linux1 product

linux_kernel≥ 4.0, < 4.4.290 | ≥ 4.5, < 4.9.288 | ≥ 4.10, < 4.14.253 | ≥ 4.15, < 4.19.214 | ≥ 4.20, < 5.4.156 | ≥ 5.5, < 5.10.76 | ≥ 5.11, < 5.14.15

5 vendors · 75 products

References

17 links

bugzilla.redhat.com/show_bug.cgi?id=2000585X Refsource MISCIssue TrackingThird Party Advisory
lists.debian.org/debian-lts-announce/2022/03/msg00012.htmlMailing ListX Refsource MLISTThird Party Advisory
www.debian.org/security/2022/dsa-5096Vendor AdvisoryX Refsource DEBIANThird Party Advisory
security.netapp.com/advisory/ntap-20220318-0007/X Refsource CONFIRMThird Party Advisory
ubuntu.com/security/CVE-2021-3760REPORT
www.openwall.com/lists/oss-security/2021/10/26/2REPORT
git.kernel.org/pub/…REPORT
ubuntu.com/security/notices/USN-5139-1Advisory
ubuntu.com/security/notices/USN-5165-1Advisory
ubuntu.com/security/notices/USN-5208-1Advisory

Show all 17 references

ubuntu.com/security/notices/USN-5209-1Advisory
ubuntu.com/security/notices/USN-5210-1Advisory
ubuntu.com/security/notices/USN-5218-1Advisory
ubuntu.com/security/notices/USN-5505-1Advisory
ubuntu.com/security/notices/USN-5513-1Advisory
www.cve.org/CVERecord?id=CVE-2021-3760REPORT
security-tracker.debian.org/tracker/CVE-2021-3760Advisory