In the IPv6 implementation in the Linux kernel before 5.13.3, net/ipv6/output_core.c has an information leak because of certain use of a hash table which, although big, doesn't properly consider that IPv6-based attackers can typically choose among many IPv6 source addresses.

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Advisories
Source ID Title
EUVD EUVD EUVD-2021-32251 In the IPv6 implementation in the Linux kernel before 5.13.3, net/ipv6/output_core.c has an information leak because of certain use of a hash table which, although big, doesn't properly consider that IPv6-based attackers can typically choose among many IPv6 source addresses.
Ubuntu USN Ubuntu USN USN-5299-1 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-5343-1 Linux kernel vulnerabilities
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Wed, 16 Jul 2025 13:45:00 +0000

Type Values Removed Values Added
Metrics epss

{'score': 0.00377}

epss

{'score': 0.00512}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2024-08-04T04:39:21.141Z

Reserved: 2021-12-25T00:00:00

Link: CVE-2021-45485

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Modified

Published: 2021-12-25T02:15:06.667

Modified: 2024-11-21T06:32:18.733

Link: CVE-2021-45485

cve-icon Redhat

Severity : Moderate

Publid Date: 2021-05-31T00:00:00Z

Links: CVE-2021-45485 - Bugzilla

cve-icon OpenCVE Enrichment

No data.

Weaknesses