CVE-2023-28484: debian debian_linux NULL Pointer Dereference
CVSS: 6.5v3.1MediumModified
AliasesALPINE-CVE-2023-28484UBUNTU-CVE-2023-28484DEBIAN-CVE-2023-28484
Published 24-04-2023Last modified 14-10-2026
Vulnerability summary
CVE-2023-28484 is a medium (CVSS 6.5) NULL Pointer Dereference vulnerability in debian debian_linux. EPSS estimates a 1.24% chance of exploitation in the next 30 days, higher than 68.8% of scored vulnerabilities. 1 public exploit is recorded.
CVSS score
6.5/10
010
Medium · v3.1 (CVE.org)EPSS score
1.24%
0%100%
Low · +0.16 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1reference
Advisory lineage
Upstream 0 · Downstream 12 · Related 6Timeline
- 24-04-2023PublishedVulnerability first disclosed.
- 14-10-2026Last modifiedVulnerability information updated.
Description
In libxml2 before 2.10.4, parsing of certain invalid XSD schemas can lead to a NULL pointer dereference and subsequently a segfault. This occurs in xmlSchemaFixupComplexType in xmlschemas.c.
CVSS metrics
5 scores · 5 sources · 1 versionMedium 6.5Preferred score · CVE.org (CNA)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:HSourcesAll 5 agree
- OSV · AlpineEcosystem advisory · calculated6.5MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
- OSV · UbuntuEcosystem advisory · calculated6.5MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated6.5MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
- NVDNIST6.5MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
EPSS trend
Probability
1.24%
Chance of exploitation in the next 30 days
Percentile
69%
Versus all other CVEs
30-day change
+0.16 pp
From 1.09% on 19-09-2026
19-09-202619-10-2026
EPSS score1.24%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
1 foundExploit Reference (gitlab.gnome.org)
Maturity: unknown
Weaknesses
CWE · root causeAffected systems
Debian2 products
- libxml2< 2.9.14+dfsg-1.2
- debian_linuxEOL10.0
Alpine1 product
- libxml2< 2.10.4-r0
Ubuntu1 product
- libxml2< 2.9.1+dfsg1-3ubuntu4.13+esm5 | < 2.9.3+dfsg1-1ubuntu0.7+esm5 | < 2.9.4+dfsg1-6.1ubuntu1.9 | < 2.9.10+dfsg-5ubuntu0.20.04.6 | < 2.9.13+dfsg-1ubuntu0.3
Xmlsoft1 product
- libxml2< 2.10.4
4 vendors · 5 products
