CVE-2022-23990: debian debian_linux Integer Overflow or Wraparound

Modified

AliasesALPINE-CVE-2022-23990UBUNTU-CVE-2022-23990DEBIAN-CVE-2022-23990

Published 26-01-2022Last modified 14-10-2026

Vulnerability summary

CVE-2022-23990 is a high (CVSS 7.5) Integer Overflow or Wraparound vulnerability in debian debian_linux. EPSS estimates a 4.69% chance of exploitation in the next 30 days, higher than 91.7% of scored vulnerabilities.

Priority

Prioritisesevere

Severe, CVSS 7.5 (CVE.org); no exploitation reported by the 5 checked sources; EPSS 5% (FIRST, 03-11-2026)

Source freshness unavailable

How is this decided?

CVSS score

7.5/10

010

High · v3.1 (CVE.org)

EPSS score

4.69%

0%100%

Low · +0.70 pp in 30 days

KEVNot listedNot listed by any tracked catalog.

RansomwareNot flaggedNo ransomware use recorded.

Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 16 · Related 6

DLA-2904-1 DSA-5073-1 MGASA-2022-0048 OPENSUSE-SU-2022:0498-1 OPENSUSE-SU-2024:11793-1 RHBA-2022:4046+10 more

Timeline

26-01-2022
PublishedVulnerability first disclosed.
14-10-2026
Last modifiedVulnerability information updated.

Description

Expat (aka libexpat) before 2.4.4 has an integer overflow in the doProlog function.

CVSS metrics

6 scores · 5 sources · 2 versions

v3.17.5v2.05.0

EPSS trend

Probability

4.69%

Chance of exploitation in the next 30 days

Percentile

92%

Versus all other CVEs

30-day change

Increase +0.70 pp

From 3.99% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs

CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

CWE-190Integer Overflow or WraparoundThe product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.

Affected systems

Version check

Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu10 products

cadaverAll versions (No fix recorded)
coin3All versions (No fix recorded)
expat< 2.1.0-4ubuntu1.4+esm4 | < 2.1.0-7ubuntu0.16.04.5+esm2 | < 2.2.5-3ubuntu0.4 | < 2.2.9-1ubuntu0.2
firefox< 1:1snap1-0ubuntu1
matanzaAll versions (No fix recorded)