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CVE-2020-22283

24
FAUCET Score

CVE-2020-22283 is a buffer overflow vulnerability in the lwIP TCP/IP stack, specifically within the icmp6_send_response_with_addrs_and_netif() function, affecting lwIP version git head. This flaw allows an unauthenticated attacker to access sensitive information by sending a specially crafted ICMPv6 packet. Rated 7.5 HIGH, it has a low attack complexity and high confidentiality impact, but no integrity or availability impact. There is currently no public exploit code, evidence of active exploitation, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:a:lwip_project:lwip:-:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.37%
Probability of exploitation in next 30 days
EPSS Percentile
69.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0137 is in the 49th percentile among its peer group of 51,506 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (4)

ubuntupatch availablevia ubuntu_usn
Product: lwip (focal)Fixed in: 2.1.2+dfsg1-4ubuntu0.1~esm1
ubuntupatch availablevia ubuntu_usn
Product: lwip (jammy)Fixed in: 2.1.3+dfsg1-1ubuntu0.1~esm1
ubuntupatch availablevia ubuntu_usn
Product: lwip (noble)Fixed in: 2.2.0+dfsg1-6.1ubuntu0.1~esm1
ubuntupatch availablevia ubuntu_usn
Product: lwip (resolute)Fixed in: 2.2.1+dfsg1-4ubuntu0.1~esm1

Vendor Advisories (1)

ubuntuUSN-8423-1

lwIP vulnerabilities

Jun 11, 2026

References

lists.debian.org / debian-lts-announce/2023/11/msg00011.html
savannah.nongnu.org / bugs/index.php
PatchVendor Advisory