CVE-2021-45480

MEDIUMNVD 5.55.5—

5.5

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.

CVSS v3: 5.5
EG Score: 5.5(medium)
EPSS: 24.8%
KEV: Not listed

Published

December 24, 2021

Last Modified

November 21, 2024

References (10)

cve@mitrehttps://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15.11
cve@mitrehttps://github.com/torvalds/linux/commit/5f9562ebe710c307adc5f666bf1a2162ee7977c0
cve@mitrehttps://lists.debian.org/debian-lts-announce/2022/03/msg00012.html
cve@mitrehttps://www.debian.org/security/2022/dsa-5050
cve@mitrehttps://www.debian.org/security/2022/dsa-5096
af854a3a-2127-422b-91ae-364da2661108https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15.11
af854a3a-2127-422b-91ae-364da2661108https://github.com/torvalds/linux/commit/5f9562ebe710c307adc5f666bf1a2162ee7977c0
af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2022/03/msg00012.html
af854a3a-2127-422b-91ae-364da2661108https://www.debian.org/security/2022/dsa-5050
af854a3a-2127-422b-91ae-364da2661108https://www.debian.org/security/2022/dsa-5096

Patch Availability(5)

Vendor / Ecosystem	Fixed in / Patch	Released	Source
ubuntu	linux-headers-azure-fde (5.4.0.1073.76+cvm1.19) @ focal	2026-05-26	ubuntu
ubuntu	linux-image-unsigned-5.13.0-37-lowlatency (5.13.0-37.42) @ impish	2026-05-26	ubuntu
ubuntu	linux-buildinfo-5.14.0-1022-oem (5.14.0-1022.24) @ focal	2026-05-26	ubuntu
ubuntu	linux-tools-5.13.0-1021-azure (5.13.0-1021.24~20.04.1) @ focal	2026-05-26	ubuntu
ubuntu	linux-headers-bluefield (5.4.0.1032.33) @ focal	2026-05-26	ubuntu

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-401Missing Release of Memory after Effective Lifetime (Memory Leak)

All Vendor Advisories

(6)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 11× in last 7d / 20× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-06-02 20:11 UTCepss_batch
2026-06-02 20:11 UTCepss_batch
2026-06-01 13:50 UTCepss_batch
2026-06-01 13:50 UTCepss_batch
2026-05-31 22:29 UTCepss_batch
2026-05-31 22:29 UTCepss_batch
2026-05-31 00:15 UTCepss_batch
2026-05-31 00:15 UTCepss_batch
2026-05-29 13:42 UTCepss_batch
2026-05-28 13:43 UTCepss_batch
2026-05-28 13:43 UTCepss_batch
2026-05-27 13:39 UTCepss_batch
2026-05-27 13:39 UTCepss_batch
2026-05-26 13:42 UTCepss_batch
2026-05-26 13:42 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-26 05:49 UTCEG score recompute
2026-05-26 05:49 UTCVendor advisory

Frequently asked(5)

What is CVE-2021-45480?

CVE-2021-45480 is a medium vulnerability published on December 24, 2021. An issue was discovered in the Linux kernel before 5.15.11. There is a memory leak in the rdsconncreate() function in net/rds/connection.c in a certain combination of circumstances.

When was CVE-2021-45480 disclosed?

CVE-2021-45480 was first published in the National Vulnerability Database on December 24, 2021, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2021-45480 actively exploited?

CVE-2021-45480 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 24.8% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2021-45480?

CVE-2021-45480 has a CVSS v3 base score of 5.5 (NVD).

How do I remediate CVE-2021-45480?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-45480, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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CVE-2021-45480

Published

Last Modified

References (10)

Patch Availability(5)

Weakness Classification(1)

All Vendor Advisories

Data Freshness Timeline

Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2021-45480?

Same vendor

Same CWE

CVE-2021-45480

📅 Published

🔄 Last Modified

🔗 References (10)

Patch Availability(5)

Weakness Classification(1)

All Vendor Advisories

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2021-45480?

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References (10)

Frequently asked(5)

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