CVE-2021-45095

MEDIUMNVD 5.55.5—

5.5

pep_sock_accept in net/phonet/pep.c in the Linux kernel through 5.15.8 has a refcount leak.

CVSS v3: 5.5
EG Score: 5.5(medium)
EPSS: 12.0%
KEV: Not listed

Published

December 16, 2021

Last Modified

November 21, 2024

References (12)

cve@mitrehttps://git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git/commit/?id=bcd0f93353326954817a4f9fa55ec57fb38acbb0
cve@mitrehttps://github.com/torvalds/linux/commit/bcd0f93353326954817a4f9fa55ec57fb38acbb0
cve@mitrehttps://lists.debian.org/debian-lts-announce/2022/03/msg00011.html
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://git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git/commit/?id=bcd0f93353326954817a4f9fa55ec57fb38acbb0
af854a3a-2127-422b-91ae-364da2661108https://github.com/torvalds/linux/commit/bcd0f93353326954817a4f9fa55ec57fb38acbb0
af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2022/03/msg00011.html
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(7)

Vendor / Ecosystem	Fixed in / Patch	Released	Source
ubuntu	linux-buildinfo-5.14.0-1022-oem (5.14.0-1022.24) @ focal	2026-05-23	ubuntu
ubuntu	linux-image-unsigned-5.13.0-37-lowlatency (5.13.0-37.42) @ impish	2026-05-23	ubuntu
ubuntu	linux-headers-azure-fde (5.4.0.1073.76+cvm1.19) @ focal	2026-05-23	ubuntu
ubuntu	linux-tools-aws-hwe (4.15.0.1124.114) @ xenial	2026-05-23	ubuntu
ubuntu	linux-image-lowlatency (4.4.0.222.229) @ xenial	2026-05-23	ubuntu
ubuntu	linux-tools-5.13.0-1021-azure (5.13.0-1021.24~20.04.1) @ focal	2026-05-23	ubuntu
ubuntu	linux-headers-bluefield (5.4.0.1032.33) @ focal	2026-05-23	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-200Exposure of Sensitive Information to an Unauthorized Actor

All Vendor Advisories

(8)

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 12× in last 7d / 20× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

2026-06-08 14:15 UTCEPSS rescore
2026-06-08 14:15 UTCEPSS rescore
2026-06-07 18:16 UTCOSV refresh
2026-06-07 15:23 UTCEPSS rescore
2026-06-07 15:23 UTCEPSS rescore
2026-06-06 13:46 UTCEPSS rescore
2026-06-06 13:46 UTCEPSS rescore
2026-06-05 22:45 UTCEPSS rescore
2026-06-05 06:09 UTCEPSS rescore
2026-06-05 06:09 UTCEPSS rescore
2026-06-04 13:10 UTCEPSS rescore
2026-06-04 13:10 UTCEPSS rescore
2026-06-02 20:11 UTCEPSS rescore
2026-06-02 20:11 UTCEPSS rescore
2026-06-01 13:50 UTCEPSS rescore
2026-06-01 13:50 UTCEPSS rescore
2026-05-31 22:29 UTCEPSS rescore
2026-05-31 22:29 UTCEPSS rescore
2026-05-31 00:15 UTCEPSS rescore
2026-05-31 00:15 UTCEPSS rescore

Frequently asked(5)

What is CVE-2021-45095?

CVE-2021-45095 is a medium vulnerability published on December 16, 2021. pepsockaccept in net/phonet/pep.c in the Linux kernel through 5.15.8 has a refcount leak.

When was CVE-2021-45095 disclosed?

CVE-2021-45095 was first published in the National Vulnerability Database on December 16, 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-2021-45095 actively exploited?

CVE-2021-45095 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 12.0% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2021-45095?

CVE-2021-45095 has a CVSS v3 base score of 5.5 (NVD).

How do I remediate CVE-2021-45095?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-45095, 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-2021-45095

Published

Last Modified

References (12)

Patch Availability(7)

Weakness Classification(1)

All Vendor Advisories

Data Freshness Timeline

Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2021-45095?

Same vendor

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CVE-2021-45095

📅 Published

🔄 Last Modified

🔗 References (12)

Patch Availability(7)

Weakness Classification(1)

All Vendor Advisories

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2021-45095?

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References (12)

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