HOMEVULNERABILITIESCVE-2021-45485
HIGH

CVE-2021-45485

CWE-327Published: December 25, 2021· Updated: Jun 17, 2026

7.5
CVSS v3.1

Official Description

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.

NVD Source

Technical Analysis

CVE-2021-45485 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), with a CVSS base score of 7.5.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityNone
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Affected Vendors & Products

Linux1 product(s)
linux kernel
netapp40 product(s)
e-series santricity os controllersolidfire\, enterprise sds \& hci storage nodesolidfire \& hci management nodebrocade fabric operating system firmwareall flash fabric-attached storage 8300 firmwareall flash fabric-attached storage 8300fabric-attached storage 8300 firmwarefabric-attached storage 8300all flash fabric-attached storage 8700 firmwareall flash fabric-attached storage 8700fabric-attached storage 8700 firmwarefabric-attached storage 8700+28
Oracle3 product(s)
communications cloud native core binding support functioncommunications cloud native core network exposure functioncommunications cloud native core policy
Source: NVD CPE · 44 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttps://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=62f20e068ccc50d6ab66fdb72ba90da2b9418c99
PATCHhttps://www.oracle.com/security-alerts/cpujul2022.html
PATCHhttps://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=62f20e068ccc50d6ab66fdb72ba90da2b9418c99
PATCHhttps://www.oracle.com/security-alerts/cpujul2022.html
ADVISORYhttps://arxiv.org/pdf/2112.09604.pdf
ADVISORYhttps://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13.3
ADVISORYhttps://security.netapp.com/advisory/ntap-20220121-0001/
ADVISORYhttps://arxiv.org/pdf/2112.09604.pdf
ADVISORYhttps://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13.3
ADVISORYhttps://security.netapp.com/advisory/ntap-20220121-0001/

All References (10)

→
https://arxiv.org/pdf/2112.09604.pdfTechnical Description · Third Party Advisory
→
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13.3Release Notes · Vendor Advisory
→
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=62f20e068ccc50d6ab66fdb72ba90da2b9418c99Patch · Vendor Advisory
→
https://security.netapp.com/advisory/ntap-20220121-0001/Third Party Advisory
→
https://www.oracle.com/security-alerts/cpujul2022.htmlPatch · Third Party Advisory
→
https://arxiv.org/pdf/2112.09604.pdfTechnical Description · Third Party Advisory
→
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13.3Release Notes · Vendor Advisory
→
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=62f20e068ccc50d6ab66fdb72ba90da2b9418c99Patch · Vendor Advisory
→
https://security.netapp.com/advisory/ntap-20220121-0001/Third Party Advisory
→
https://www.oracle.com/security-alerts/cpujul2022.htmlPatch · Third Party Advisory

Quick Facts

CVE IDCVE-2021-45485
CVSS Score7.5 / 10
SeverityHIGH
WeaknessCWE-327
CISA KEVNo
Affected3 vendor(s)
PublishedDec 25, 2021

Related CVEs (CWE-327)

CVE-2026-50086
10.0
CVE-2025-54426
9.9
CVE-2026-21718
9.8
CVE-2024-31510
9.8
CVE-2023-34039
9.8
CVE-2023-34130
9.8

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2021-45485 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWatch. CVE data is provided under the NVD usage policy.
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