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CVE-2022-39028

26
FAUCET Score

CVE-2022-39028 is a NULL pointer dereference vulnerability affecting telnetd in GNU Inetutils through 2.3, MIT krb5-appl through 1.0.3, and derivative works. This vulnerability has a CVSS score of 7.5 (HIGH), indicating it can be exploited remotely with low attack complexity to cause a denial of service (DoS) by crashing the telnetd application. While not actively exploited (no KEV, Metasploit, Nuclei, or ExploitDB entries), repeated crashes can lead to the telnet service becoming unavailable. There is no significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 2.3CPE matchmatch criteria
cpe:2.3:a:gnu:inetutils:*:*:*:*:*:*:*:*
<= 1.0.3CPE matchmatch criteria
cpe:2.3:a:mit:kerberos_5:*:*:*:*:*:*:*:*
10.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
<= 0.17CPE matchmatch criteria
cpe:2.3:a:netkit-telnet_project:netkit-telnet:*:*:*:*:*:*:*:*

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:N/I:N/A:H

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

Exploit Intelligence

EPSS Score
1.66%
Probability of exploitation in next 30 days
EPSS Percentile
74.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0166 is in the 56th percentile among its peer group of 51,485 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

Vendor Advisories (1)

redhatCVE-2022-39028Moderate

krb5-appl: NULL pointer dereference

Aug 30, 2022

References

git.hadrons.org / cgit/debian/pkgs/inetutils.git/commit
Mailing ListPatchVendor Advisory
lists.debian.org / debian-lts-announce/2022/11/msg00033.html
Mailing ListThird Party Advisory
lists.gnu.org / archive/html/bug-inetutils/2022-08/msg00002.html
Mailing ListVendor Advisory
pierrekim.github.io / blog/2022-08-24-2-byte-dos-freebsd-netbsd-telnetd-netkit-telnetd-inetutils-telnetd-kerberos-telnetd.html
ExploitPatchThird Party Advisory