7.5

CVE-2022-43680: debian debian_linux Use After Free

Modified
AliasesALPINE-CVE-2022-43680MGASA-2022-0409SUSE-SU-2022:3874-1
Published 24-10-2022Last modified 14-10-2026

Vulnerability summary

CVE-2022-43680 is a high (CVSS 7.5) Use After Free vulnerability in debian debian_linux. EPSS estimates a 3.16% chance of exploitation in the next 30 days, higher than 87.9% of scored vulnerabilities. 1 public exploit is recorded.

Priority
Prioritisepublic exploit

Public exploit (GitHub, Date unknown)

Source freshness unavailable

How is this decided?
CVSS score
7.5/10
010
High · v3.1 (CVE.org)
EPSS score
3.16%
0%100%
Low · +0.70 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits1github

Advisory lineage

Upstream 0 · Downstream 15 · Related 8
MGASA-2022-0427MGASA-2026-0173RHSA-2022:8548RHSA-2022:8549RHSA-2022:8550RHSA-2022:8553

Timeline

  1. 24-10-2022
    PublishedVulnerability first disclosed.
  2. 14-10-2026
    Last modifiedVulnerability information updated.

Description

In libexpat through 2.4.9, there is a use-after free caused by overeager destruction of a shared DTD in XML_ExternalEntityParserCreate in out-of-memory situations.

CVSS metrics

8 scores · 8 sources · 1 version

EPSS trend

Probability

3.16%

Chance of exploitation in the next 30 days

Percentile

88%

Versus all other CVEs

30-day change

Increase +0.70 pp

From 2.46% 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

1 found
  • githubUnverified

    Libexpat

    Maturity: poc

Weaknesses

CWE · root cause

Affected systems

Version check

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

Suse33 products
  • expat&distro=SUSE Enterprise Storage 6< 2.2.5-150000.3.25.1
  • expat&distro=SUSE Enterprise Storage 7< 2.2.5-150000.3.25.1
  • expat&distro=SUSE Linux Enterprise High Performance Computing 15 SP1-ESPOS< 2.2.5-150000.3.25.1
  • expat&distro=SUSE Linux Enterprise High Performance Computing 15 SP1-LTSS< 2.2.5-150000.3.25.1
  • expat&distro=SUSE Linux Enterprise High Performance Computing 15 SP2-ESPOS< 2.2.5-150000.3.25.1
Ubuntu15 products
  • ayttmAll versions (No fix recorded)
  • cableswigAll versions (No fix recorded)
  • cadaverAll versions (No fix recorded)
  • coin3All versions (No fix recorded)
  • expat< 2.2.5-3ubuntu0.9 | < 2.1.0-4ubuntu1.4+esm7 | < 2.1.0-7ubuntu0.16.04.5+esm7 | < 2.2.5-3ubuntu0.8 | < 2.2.9-1ubuntu0.6 | < 2.4.7-1ubuntu0.2
Netapp9 products
Opensuse4 products
  • expat&distro=openSUSE Leap 15.3< 2.2.5-150000.3.25.1
  • expat&distro=openSUSE Leap 15.4< 2.4.4-150400.3.12.1
  • expat&distro=openSUSE Leap Micro 5.2< 2.2.5-150000.3.25.1
  • expat&distro=openSUSE Tumbleweed< 2.5.0-1.1
Redhat4 products
  • expat< 0:2.2.5-10.el8_7.1 | < 0:2.4.9-1.el9_1.1 | < 0:2.2.5-8.el8_6.4
  • expat-debuginfo< 0:2.2.5-10.el8_7.1 | < 0:2.4.9-1.el9_1.1 | < 0:2.2.5-8.el8_6.4
  • expat-debugsource< 0:2.2.5-10.el8_7.1 | < 0:2.4.9-1.el9_1.1 | < 0:2.2.5-8.el8_6.4
  • expat-devel< 0:2.2.5-10.el8_7.1 | < 0:2.4.9-1.el9_1.1 | < 0:2.2.5-8.el8_6.4
Debian3 products
  • expat< 2.2.10-2+deb11u5 | < 2.2.6-2+deb10u6 | < 2.5.0-1
  • libxmltokAll versions (No fix recorded)
  • debian_linuxEOL10.0 | 11.0
Alpine1 product
  • expat< 2.2.10-r8 | < 2.5.0-r0
Chainguard1 product
  • expatAll versions (No fix recorded)
Fedoraproject1 product
Libexpat_project1 product
Mageia1 product
  • expat< 2.2.10-1.6.mga8
Wolfi1 product
  • expatAll versions (No fix recorded)

12 vendors · 74 products

References

42 links
Show all 42 references