Medium severity · published Oct 6, 2023
CVE-2023-45322
libxml2 through 2.11.5 has a use-after-free that can only occur after a certain memory allocation fails
6.5
CVSS
1%
EPSS
No
On KEV
Description
libxml2 through 2.11.5 has a use-after-free that can only occur after a certain memory allocation fails. This occurs in xmlUnlinkNode in tree.c. NOTE: the vendor's position is "I don't think these issues are critical enough to warrant a CVE ID ... because an attacker typically can't control when memory allocations fail."
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.0% · higher than 62% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
LI
Libxml2 · Xmlsoft
through 2.11.5 · source: NVD
SS
SIMATIC S7-1500 CPU 1518-4 PN/DP MFP · Siemens
V3.1.0 before V3.1.5; V3.1.0 before V3.1.5 · source: CISA
SS
SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP · Siemens
V3.1.0 before V3.1.5; V3.1.0 before V3.1.5 · source: CISA
SS
SIPLUS S7-1500 CPU 1518-4 PN/DP MFP · Siemens
V3.1.0 before V3.1.5 · source: CISA
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2023-45322
CVE.org
https://www.cve.org/CVERecord?id=CVE-2023-45322
Mailing List
http://www.openwall.com/lists/oss-security/2023/10/06/5
Issue Tracking
https://gitlab.gnome.org/GNOME/libxml2/-/issues/344
Issue Tracking
https://gitlab.gnome.org/GNOME/libxml2/-/issues/583
lists.debian.org
https://lists.debian.org/debian-lts-announce/2025/02/msg00028.html
cert-portal.siemens.com
https://cert-portal.siemens.com/productcert/html/ssa-398330.html
More from Libxml2
9.8
CVE-2026-6653
libxml2: Use after free in xmlParseInternalSubset via improper entity resolution handling
9.8
CVE-2024-56171
libxml2 before 2.12.10 and 2.13.x before 2.13.6 has a use-after-free in xmlSchemaIDCFillNodeTables and xmlSchemaBubbleIDCNodeTables in xmlschemas.c
9.8
CVE-2017-7375
A flaw in libxml2 allows remote XML entity inclusion with default parser flags (i.e., when the caller did not request entity substitution, DTD validation, external DTD subset…
9.8
CVE-2017-7376
Buffer overflow in libxml2 allows remote attackers to execute arbitrary code by leveraging an incorrect limit for port values when handling redirects
9.8
CVE-2017-16931
parser.c in libxml2 before 2.9.5 mishandles parameter-entity references because the NEXTL macro calls the xmlParserHandlePEReference function in the case of a '%' character in a…