CVE-2021-45485

high-risk
Published 2021-12-25

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.

Do I need to act?

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0.77% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
7
CVSS 7.5/10 High
NETWORK / LOW complexity

Affected Products (20)

Brocade Fabric Operating System Firmware
All Flash Fabric-Attached Storage 8300 Firmware
Fabric-Attached Storage 8300 Firmware
All Flash Fabric-Attached Storage 8700 Firmware
Fabric-Attached Storage 8700 Firmware
Fabric-Attached Storage A400 Firmware

Affected Vendors

Linux Oracle Netapp

References (10)

Technical Description https://arxiv.org/pdf/2112.09604.pdf
Release Notes https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13.3
Patch https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=62...
Third Party Advisory https://security.netapp.com/advisory/ntap-20220121-0001/
Patch https://www.oracle.com/security-alerts/cpujul2022.html
Technical Description https://arxiv.org/pdf/2112.09604.pdf
Release Notes https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13.3
Patch https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=62...
Third Party Advisory https://security.netapp.com/advisory/ntap-20220121-0001/
Patch https://www.oracle.com/security-alerts/cpujul2022.html
50
/ 100
high-risk
Severity 26/34 · High
Exploitability 3/34 · Minimal
Exposure 21/34 · High