Is CVE-2022-22822 in the CISA KEV catalog?

No. CVE-2022-22822 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2022-22822?

CVE-2022-22822 has a CVSS v3 base score of 9.8 (CRITICAL).

What is the EPSS score for CVE-2022-22822?

CVE-2022-22822 has an EPSS score of 4.83% (91th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2022-22822?

Upgrade expat on debian 11 to 2.2.10-2+deb11u1 or later. Fixes are available for 15 affected products.

CVE & CISA-KEV Catalog

CVE-2022-22822

CRITICALEPSS 91th pctl

9.8

CVSS v3

NVD

Description

addBinding in xmlparse.c in Expat (aka libexpat) before 2.4.3 has an integer overflow.

CWE-190Integer Overflow

How to fix

Remediation Available

expatDebian

Fixed in:2.2.10-2+deb11u1CVE-2022-22822

Fixed in:2.4.3-1CVE-2022-22822

expatRed Hat / RHEL

Fixed in:0:2.2.10-1.el8_4RHSA-2025:22785

Fixed in:0:2.2.10-1.el8_2RHSA-2025:22871

expatRocky

Fixed in:0:2.2.10-1.el8_4RHSA-2025:22785

Fixed in:0:2.2.10-1.el8_2RHSA-2025:22871

Fixed in:0:2.2.10-1.el8_4RHSA-2025:22785

expat-debuginfoRed Hat / RHEL

Fixed in:0:2.2.10-1.el8_4RHSA-2025:22785

Fixed in:0:2.2.10-1.el8_2RHSA-2025:22871

expat-debuginfoRocky

Fixed in:0:2.2.10-1.el8_4RHSA-2025:22785

Fixed in:0:2.2.10-1.el8_2RHSA-2025:22871

expat-debugsourceRocky

Fixed in:0:2.2.10-1.el8_4RHSA-2025:22785

Fixed in:0:2.2.10-1.el8_2RHSA-2025:22871

Fixed in:0:2.2.10-1.el8_4RHSA-2025:22785

Fixed in:0:2.2.10-1.el8_2RHSA-2025:22871

expat-debugsourceRed Hat / RHEL

Fixed in:0:2.2.10-1.el8_2RHSA-2025:22871

Fixed in:0:2.2.10-1.el8_4RHSA-2025:22785

Fixed in:0:2.2.10-1.el8_2RHSA-2025:22871

expat-develRed Hat / RHEL

Fixed in:0:2.2.10-1.el8_2RHSA-2025:22871

Fixed in:0:2.2.10-1.el8_4RHSA-2025:22785

expat-develRocky

Fixed in:0:2.2.10-1.el8_2RHSA-2025:22871

Fixed in:0:2.2.10-1.el8_4RHSA-2025:22785

expatUbuntu

Fixed in:2.1.0-4ubuntu1.4+esm4USN-5288-1

Fixed in:2.1.0-7ubuntu0.16.04.5+esm2USN-5288-1

Fixed in:2.2.5-3ubuntu0.4USN-5288-1

Fixed in:2.2.9-1ubuntu0.2USN-5288-1

lib64expat1Ubuntu

Fixed in:2.1.0-4ubuntu1.4+esm4USN-5288-1

Fixed in:2.1.0-7ubuntu0.16.04.5+esm2USN-5288-1

libexpat1Ubuntu

Fixed in:2.1.0-4ubuntu1.4+esm4USN-5288-1

Fixed in:2.1.0-7ubuntu0.16.04.5+esm2USN-5288-1

Fixed in:2.2.5-3ubuntu0.4USN-5288-1

Fixed in:2.2.9-1ubuntu0.2USN-5288-1

libxmltokUbuntu

Fixed in:1.2-3ubuntu0.16.04.1~esm2USN-5455-1

Fixed in:1.2-4ubuntu0.18.04.1~esm4USN-7199-1

Fixed in:1.2-4ubuntu0.18.04.1~esm1USN-5455-1

Fixed in:1.2-4ubuntu0.20.04.1~esm4USN-7199-1

Fixed in:1.2-4ubuntu0.20.04.1~esm1USN-5455-1

Fixed in:1.2-4ubuntu0.22.04.1~esm4USN-7199-1

Fixed in:1.2-4ubuntu0.22.04.1~esm1USN-5455-1

Fixed in:1.2-4.1ubuntu2.24.0.4.1+esm2USN-7199-1

libxmltok1Ubuntu

Fixed in:1.2-3ubuntu0.16.04.1~esm2USN-5455-1

Fixed in:1.2-4ubuntu0.18.04.1~esm4USN-7199-1

Fixed in:1.2-4ubuntu0.18.04.1~esm1USN-5455-1

Fixed in:1.2-4ubuntu0.20.04.1~esm1USN-5455-1

Fixed in:1.2-4ubuntu0.20.04.1~esm4USN-7199-1

Fixed in:1.2-4ubuntu0.22.04.1~esm4USN-7199-1

Fixed in:1.2-4ubuntu0.22.04.1~esm1USN-5455-1

libxmltok1t64Ubuntu

Fixed in:1.2-4.1ubuntu2.24.0.4.1+esm2USN-7199-1

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

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

4.83%probability of exploitation in 30 days

91stpercentile

High risk: more likely to be exploited than 91% of all known CVEs.

References

Patch2

Third-Party Advisory4

Related Vulnerabilities

Other CWE-190 (Integer Overflow) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2020-16040	Medium	6.5	100%	-	Fix
CVE-2019-11477	High	7.5	99%	-	Fix
CVE-2023-44443	High	7.8	94%	-	Fix
CVE-2014-0569	High	9.3	90%	-	-
CVE-2017-3599	High	7.5	90%	-	Fix
CVE-2023-21716	Critical	9.8	82%	-	Fix

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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 2025-05-05.