CVE-2023-28484
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.
02 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.
03 Exploitation and scoring
- Exploitation
- Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.
- SSVC decision
- ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
- AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
- Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.
- EPSS probability
- 1.24% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 68.8% of scored records. A rank, not a probability.
- NVD base score
- 6.5 (CVSS v3.x), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
- NVD analysis status
- Modified. NVD last modified this record on 2026-10-14.
- Red Hat severity
- Moderate. Red Hat's rating for its own products, not a CVSS rating.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2023-04-24 00:00Z3 YR AGO
- Last updated
- 2026-10-14 22:54Z14 DAYS AGO
- Reserved
- 2023-03-16
- Assigning CNA
- mitre
- Record state
- PUBLISHED
- Severity
- Medium (CVSS 6.5)
- CNA CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
- Weaknesses
- Data version
- 5.2
- Document digest
- 6a79d2db7eb541d5ff042a312fe6e22fc3de84465c1fe4d5c71e99521e34f4fa
05 Affected products
06 References
- gitlab.gnome.orghttps://gitlab.gnome.org/GNOME/libxml2/-/releases/v2.10.4
- gitlab.gnome.orghttps://gitlab.gnome.org/GNOME/libxml2/-/issues/491
- lists.debian.org[debian-lts-announce] 20230430 [SECURITY] [DLA 3405-1] libxml2 security updatehttps://lists.debian.org/debian-lts-announce/2023/04/msg00031.html
- security.netapp.comhttps://security.netapp.com/advisory/ntap-20230601-0006/
- security.netapp.comhttps://security.netapp.com/advisory/ntap-20240201-0005/
- cert-portal.siemens.comhttps://cert-portal.siemens.com/productcert/html/ssa-398330.html
- cert-portal.siemens.comhttps://cert-portal.siemens.com/productcert/html/ssa-556635.html
- cert-portal.siemens.comhttps://cert-portal.siemens.com/productcert/html/ssa-625862.html
- cert-portal.siemens.comhttps://cert-portal.siemens.com/productcert/html/ssa-341067.html
- cert-portal.siemens.comhttps://cert-portal.siemens.com/productcert/html/ssa-769027.html
07 Fixed in
AlmaLinux 8
- libxml2 Fixed in 2.9.7-16.el8_8.1
- libxml2-devel Fixed in 2.9.7-16.el8_8.1
- python3-libxml2 Fixed in 2.9.7-16.el8_8.1
Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
AlmaLinux 9
- libxml2 Fixed in 2.9.13-3.el9_2.1
- libxml2-devel Fixed in 2.9.13-3.el9_2.1
- python3-libxml2 Fixed in 2.9.13-3.el9_2.1
Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
CloudLinux 8
- libxml2 Fixed in 2.9.7-16.el8_8.1
- libxml2-devel Fixed in 2.9.7-16.el8_8.1
- python3-libxml2 Fixed in 2.9.7-16.el8_8.1
Derived from AlmaLinux 8. Partial coverage: only packages taken from AlmaLinux 8 are listed.
Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
CloudLinux 9
- libxml2 Fixed in 2.9.13-3.el9_2.1
- libxml2-devel Fixed in 2.9.13-3.el9_2.1
- python3-libxml2 Fixed in 2.9.13-3.el9_2.1
Derived from AlmaLinux 9. Partial coverage: only packages taken from AlmaLinux 9 are listed.
Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
Debian 12
- libxml2 Fixed in 2.9.14+dfsg-1.2
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 13
- libxml2 Fixed in 2.9.14+dfsg-1.2
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 14
- libxml2 Fixed in 2.9.14+dfsg-1.2
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 18.04 LTS
- libxml2 Fixed in 2.9.4+dfsg1-6.1ubuntu1.9
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 20.04 LTS
- libxml2 Fixed in 2.9.10+dfsg-5ubuntu0.20.04.6
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 22.04 LTS
- libxml2 Fixed in 2.9.13+dfsg-1ubuntu0.3
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu Pro 14.04 LTS
- libxml2 Fixed in 2.9.1+dfsg1-3ubuntu4.13+esm5Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu Pro 16.04 LTS
- libxml2 Fixed in 2.9.3+dfsg1-1ubuntu0.7+esm5Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.