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CVE-2021-45480

21
FAUCET Score

CVE-2021-45480 is a memory leak vulnerability in the Linux kernel (before version 5.15.11), specifically within the __rds_conn_create() function, affecting various Debian and Linux kernel distributions. With a CVSS score of 5.5 (Medium), it requires local access and low privileges, potentially leading to a high impact on availability (denial of service) but no impact on confidentiality or integrity. Currently, there is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
< 5.15.11CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
9.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
10.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
11.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

5.5MEDIUM

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
1.8
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.35%
Probability of exploitation in next 30 days
EPSS Percentile
27.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0035 is in the 84th percentile among its peer group of 15,940 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (9)

github_advisorypatch availablevia nvd_reference
View patch
microsoftpatch availablevia msrc
Product: 18928-16820Fixed in: 5.10.88.1-2
microsoftpatch availablevia msrc
Product: 18809-16823Fixed in: 5.15.18.1-1
microsoftpatch availablevia msrc
Product: 16989-17084Fixed in: 6.6.35.1-1
microsoftpatch availablevia msrc
Product: 19797-17084Fixed in: 6.6.35.1-1
microsoftpatch availablevia msrc
Product: cm1 kernel 5.10.88.1-2 on CBL Mariner 1.0Fixed in: 5.10.88.1-2
microsoftpatch availablevia msrc
Product: cbl2 kernel 5.15.18.1-1 on CBL Mariner 2.0Fixed in: 5.15.18.1-1
microsoftpatch availablevia msrc
Product: azl3 hyperv-daemons 6.6.35.1-1 on Azure Linux 3.0Fixed in: 6.6.35.1-1
microsoftpatch availablevia msrc
Product: azl3 hyperv-daemons 6.6.92.2-1 on Azure Linux 3.0Fixed in: 6.6.35.1-1

Vendor Advisories (2)

microsoft2021-Dec/CVE-2021-45480Moderate

An issue was discovered in the Linux kernel before 5.15.11. There is a memory leak in the __rds_conn_create() function in net/rds/connection.c in a certain combination of circumstances.

Dec 14, 2021
redhatCVE-2021-45480Moderate

kernel: memory leak in the __rds_conn_create() in net/rds/connection.c

Dec 14, 2021

References

cdn.kernel.org / pub/linux/kernel/v5.x/ChangeLog-5.15.11
Release NotesVendor Advisory
github.com / torvalds/linux/commit/5f9562ebe710c307adc5f666bf1a2162ee7977c0
PatchVendor Advisory
lists.debian.org / debian-lts-announce/2022/03/msg00012.html
Mailing ListThird Party Advisory
debian.org / security/2022/dsa-5050
Third Party Advisory
debian.org / security/2022/dsa-5096
Third Party Advisory