Is CVE-2021-45485 in the CISA KEV catalog?

No. CVE-2021-45485 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-45485?

CVE-2021-45485 has a CVSS v3 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2021-45485?

CVE-2021-45485 has an EPSS score of 3.62% (88th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-45485?

Upgrade linux on debian 11 to 5.10.70-1 or later. Fixes are available for 23 affected products.

CVE & CISA-KEV Catalog

CVE-2021-45485

HIGHEPSS 88th pctl

7.5

CVSS v3

NVD

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.

CWE-327

How to fix

Remediation Available

linuxDebian

Fixed in:5.10.70-1CVE-2021-45485

Fixed in:5.14.6-1CVE-2021-45485

linuxUbuntu

Fixed in:4.4.0-222.255USN-5343-1

Fixed in:4.4.0-219.252USN-5299-1

linux-awsUbuntu

Fixed in:4.4.0-1102.107USN-5343-1

Fixed in:4.4.0-1099.104USN-5299-1

Fixed in:4.4.0-1135.149USN-5299-1

Fixed in:4.4.0-1138.152USN-5343-1

linux-image-4.4.0-1099-awsUbuntu

Fixed in:4.4.0-1099.104USN-5299-1

linux-image-4.4.0-1100-kvmUbuntu

Fixed in:4.4.0-1100.109USN-5299-1

linux-image-4.4.0-1102-awsUbuntu

Fixed in:4.4.0-1102.107USN-5343-1

linux-image-4.4.0-1103-kvmUbuntu

Fixed in:4.4.0-1103.112USN-5343-1

linux-image-4.4.0-1135-awsUbuntu

Fixed in:4.4.0-1135.149USN-5299-1

linux-image-4.4.0-1138-awsUbuntu

Fixed in:4.4.0-1138.152USN-5343-1

linux-image-4.4.0-219-genericUbuntu

Fixed in:4.4.0-219.252~14.04.1USN-5299-1

Fixed in:4.4.0-219.252USN-5299-1

linux-image-4.4.0-219-lowlatencyUbuntu

Fixed in:4.4.0-219.252~14.04.1USN-5299-1

Fixed in:4.4.0-219.252USN-5299-1

linux-image-4.4.0-222-genericUbuntu

Fixed in:4.4.0-222.255~14.04.1USN-5343-1

Fixed in:4.4.0-222.255USN-5343-1

linux-image-4.4.0-222-lowlatencyUbuntu

Fixed in:4.4.0-222.255~14.04.1USN-5343-1

Fixed in:4.4.0-222.255USN-5343-1

linux-image-awsUbuntu

Fixed in:4.4.0.1102.100USN-5343-1

Fixed in:4.4.0.1099.97USN-5299-1

Fixed in:4.4.0.1138.143USN-5343-1

Fixed in:4.4.0.1135.140USN-5299-1

linux-image-genericUbuntu

Fixed in:4.4.0.222.229USN-5343-1

Fixed in:4.4.0.219.226USN-5299-1

linux-image-generic-lts-xenialUbuntu

Fixed in:4.4.0.219.190USN-5299-1

Fixed in:4.4.0.222.193USN-5343-1

linux-image-kvmUbuntu

Fixed in:4.4.0.1100.98USN-5299-1

Fixed in:4.4.0.1103.101USN-5343-1

linux-image-lowlatencyUbuntu

Fixed in:4.4.0.222.229USN-5343-1

Fixed in:4.4.0.219.226USN-5299-1

linux-image-lowlatency-lts-xenialUbuntu

Fixed in:4.4.0.222.193USN-5343-1

Fixed in:4.4.0.219.190USN-5299-1

linux-image-virtualUbuntu

Fixed in:4.4.0.219.226USN-5299-1

Fixed in:4.4.0.222.229USN-5343-1

linux-image-virtual-lts-xenialUbuntu

Fixed in:4.4.0.219.190USN-5299-1

Fixed in:4.4.0.222.193USN-5343-1

linux-kvmUbuntu

Fixed in:4.4.0-1100.109USN-5299-1

Fixed in:4.4.0-1103.112USN-5343-1

linux-lts-xenialUbuntu

Fixed in:4.4.0-219.252~14.04.1USN-5299-1

Fixed in:4.4.0-222.255~14.04.1USN-5343-1

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

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

Exploit Intelligence

3.62%probability of exploitation in 30 days

88thpercentile

Elevated risk: more likely to be exploited than 88% of all known CVEs.

References

Patch2

Vendor Advisory1

cdn.kernel.org

Third-Party Advisory2

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.