CVE-2022-25315

33

FAUCET Score

CVE-2022-25315 is a critical integer overflow vulnerability (CWE-190) in Expat (libexpat) versions prior to 2.4.5, impacting products from Debian, Fedora, Oracle, and Siemens. With a CVSS score of 9.8, it presents a severe risk as it can be exploited remotely without user interaction, leading to complete compromise of confidentiality, integrity, and availability. Currently, there is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

Vendor	Product	Version(s)	CPE
		< 2.4.5CPE matchmatch criteria	cpe:2.3:a:libexpat_project:libexpat::::::::
		10.0CPE matchmatch criteria	cpe:2.3:o:debian:debian_linux:10.0:::::::*
		11.0CPE matchmatch criteria	cpe:2.3:o:debian:debian_linux:11.0:::::::*
		34CPE matchmatch criteria	cpe:2.3:o:fedoraproject:fedora:34:::::::*
		35CPE matchmatch criteria	cpe:2.3:o:fedoraproject:fedora:35:::::::*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

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

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

Exploitability Score

3.9

Impact Score

5.9

CvssVersion

3.1

Exploit Intelligence

EPSS Score

4.78%

Probability of exploitation in next 30 days

EPSS Percentile

91.0%

Percentile rank of EPSS score among Peer Group

As of 2026-07-27

Model: v2026.06.15

This CVE's current EPSS score of 0.0478 is in the 85th percentile among its peer group of 36,862 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (29)

gcppatch availablevia llm_extracted

microsoftpatch availablevia msrc

Product: 18787-16820Fixed in: 2.4.6-1

microsoftpatch availablevia msrc

Product: 18788-16823Fixed in: 2.4.8-1

microsoftpatch availablevia msrc

Product: cbl2 expat 2.4.8-1 on CBL Mariner 2.0Fixed in: 2.4.8-1

microsoftpatch availablevia msrc

Product: cm1 expat 2.4.6-1 on CBL Mariner 1.0Fixed in: 2.4.6-1

oraclepatch availablevia nvd_reference

redhatpatch availablevia redhat_api

Product: Red Hat Enterprise Linux 6 Extended Lifecycle SupportFixed in: expat-0:2.0.1-14.el6_10

redhatpatch availablevia redhat_api

Product: Red Hat Enterprise Linux 8Fixed in: firefox-0:91.7.0-3.el8_5

redhatpatch availablevia redhat_api

Product: Red Hat Enterprise Linux 8Fixed in: thunderbird-0:91.7.0-2.el8_5

redhatpatch availablevia redhat_api

Product: Red Hat Enterprise Linux 8Fixed in: mingw-expat-0:2.4.8-1.el8

redhatpatch availablevia redhat_api

Product: Red Hat Enterprise Linux 8Fixed in: expat-0:2.2.5-4.el8_5.3

redhatpatch availablevia redhat_api

Product: Red Hat Enterprise Linux 8.1 Update Services for SAP SolutionsFixed in: firefox-0:91.7.0-3.el8_1

redhatpatch availablevia redhat_api

Product: Red Hat Enterprise Linux 8.1 Update Services for SAP SolutionsFixed in: thunderbird-0:91.7.0-2.el8_1

redhatpatch availablevia redhat_api

Product: Red Hat Enterprise Linux 8.1 Update Services for SAP SolutionsFixed in: expat-0:2.2.5-3.el8_1.1

redhatpatch availablevia redhat_api

Product: Red Hat Enterprise Linux 8.2 Extended Update SupportFixed in: firefox-0:91.7.0-3.el8_2

redhatpatch availablevia redhat_api

Product: Red Hat Enterprise Linux 8.2 Extended Update SupportFixed in: thunderbird-0:91.7.0-2.el8_2

redhatpatch availablevia redhat_api

Product: Red Hat Enterprise Linux 8.2 Extended Update SupportFixed in: expat-0:2.2.5-3.el8_2.2

redhatpatch availablevia redhat_api

Product: Red Hat Enterprise Linux 8.4 Extended Update SupportFixed in: firefox-0:91.7.0-3.el8_4

redhatpatch availablevia redhat_api

Product: Red Hat Enterprise Linux 8.4 Extended Update SupportFixed in: thunderbird-0:91.7.0-2.el8_4

redhatpatch availablevia redhat_api

Product: Red Hat Enterprise Linux 8.4 Extended Update SupportFixed in: expat-0:2.2.5-4.el8_4.2

redhatpatch availablevia redhat_api

Product: Red Hat Enterprise Linux 9Fixed in: expat-0:2.2.10-12.el9_0

redhatpatch availablevia redhat_api

Product: Red Hat Virtualization 4 for Red Hat Enterprise Linux 7Fixed in: redhat-virtualization-host-0:4.3.22-20220330.1.el7_9

redhatpatch availablevia redhat_api

Product: Red Hat Virtualization 4 for Red Hat Enterprise Linux 8Fixed in: redhat-virtualization-host-0:4.4.10-202203211649_8.5

redhatpatch availablevia redhat_api

Product: Text-Only JBCSFixed in: expat

redhatpatch availablevia redhat_api

Product: Red Hat Enterprise Linux 7Fixed in: firefox-0:91.7.0-3.el7_9

redhatpatch availablevia redhat_api

Product: Red Hat Enterprise Linux 7Fixed in: expat-0:2.1.0-14.el7_9

redhatpatch availablevia redhat_api

Product: Red Hat Enterprise Linux 7Fixed in: thunderbird-0:91.7.0-2.el7_9

redhatno patchvia redhat_api

Product: Red Hat Enterprise Linux 8Fixed in: firefox:flatpak/firefox

redhatno patchvia redhat_api

Product: Red Hat Enterprise Linux 8Fixed in: thunderbird:flatpak/thunderbird

Vendor Advisories (3)

gcpllm-gcp-251ac0c885af6b4bCRITICAL

Certain HP LaserJet Enterprise and HP LaserJet Managed Printers – Potential Denial of Service & Potential Buffer Overflow

redhatCVE-2022-25315Important

expat: Integer overflow in storeRawNames()

microsoft2022-Feb/CVE-2022-25315Critical

In Expat (aka libexpat) before 2.4.5 there is an integer overflow in storeRawNames.

References

cert-portal.siemens.com / productcert/pdf/ssa-484086.pdf

Third Party Advisory

github.com / libexpat/libexpat/pull/559

ExploitThird Party Advisory

lists.debian.org / debian-lts-announce/2022/03/msg00007.html

Third Party Advisory

lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/3UFRBA3UQVIQKXTBUQXDWQOVWNBKLERU

lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/Y27XO3JMKAOMQZVPS3B4MJGEAHCZF5OM

security.gentoo.org / glsa/202209-24

Third Party Advisory

security.netapp.com / advisory/ntap-20220303-0008

Third Party Advisory

debian.org / security/2022/dsa-5085

Third Party Advisory

oracle.com / security-alerts/cpuapr2022.html

PatchThird Party Advisory

openwall.com / lists/oss-security/2022/02/19/1

Mailing ListThird Party Advisory