CVE-2022-23852: debian debian_linux Integer Overflow or Wraparound
Vulnerability summary
CVE-2022-23852 is a critical (CVSS 9.8) Integer Overflow or Wraparound vulnerability in debian debian_linux. EPSS estimates a 5.08% chance of exploitation in the next 30 days, higher than 92.3% of scored vulnerabilities.
Severe, CVSS 9.8 (CVE.org); no exploitation reported by the 5 checked sources; EPSS 5% (FIRST, 03-11-2026)
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 13 · Related 6Timeline
- 24-01-2022PublishedVulnerability first disclosed.
- 14-10-2026Last modifiedVulnerability information updated.
Description
Expat (aka libexpat) before 2.4.4 has a signed integer overflow in XML_GetBuffer, for configurations with a nonzero XML_CONTEXT_BYTES.
CVSS metrics
7 scores · 6 sources · 2 versions- OSV · AlpineEcosystem advisory · calculated9.8CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- OSV · Red hatEcosystem advisory · calculated9.8CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- OSV · UbuntuEcosystem advisory · calculated9.8CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- OSV · DebianEcosystem advisory · calculated9.8CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- NVDNIST9.8CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS trend
Probability
5.08%
Chance of exploitation in the next 30 days
Percentile
92%
Versus all other CVEs
30-day change
Increase +0.52 pp
From 4.56% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.
Ubuntu15 products
- cableswigAll versions (No fix recorded)
- 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 | < 2.4.3-2
- firefox< 1:1snap1-0ubuntu1
Redhat4 products
- expat< 0:2.2.5-4.el8_4.3
- expat-debuginfo< 0:2.2.5-4.el8_4.3
- expat-debugsource< 0:2.2.5-4.el8_4.3
- expat-devel< 0:2.2.5-4.el8_4.3
Debian3 products
- expat< 2.4.3-2
- libxmltokAll versions (No fix recorded)
- debian_linuxEOL9.0
Alpine2 products
- expat< 2.2.10-r1 | < 2.2.10-r3 | < 2.4.4-r0
- qt5-qtwebengine< 5.15.3_git20211127-r4 | < 5.15.3_git20220121-r4
Netapp2 products
Libexpat_project1 product
- libexpat< 2.4.4
Oracle1 product
Siemens1 product
Tenable1 product
- nessus< 8.15.3 | ≥ 10.0.0, < 10.1.1
9 vendors · 30 products
References
21 links- github.com/libexpat/libexpat/pull/550X Refsource MISCARTICLEREPORTIssue TrackingPatchThird Party Advisory
- lists.debian.org/debian-lts-announce/2022/03/msg00007.htmlMailing ListX Refsource MLISTThird Party Advisory
