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MEDIUM

CVE-2023-39615

CVSS v3

6.5

MEDIUM

EPSS Score

1.1 %

exploit probability, as of 2026-10-16

CISA KEV

No

known exploited

Exploitation

—

SSVC status

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Affected and fixed versions

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • libxml2AlmaLinux:9all versions · fixed in 2.9.13-5.el9_3and 2 other packages
  • libxml2AlmaLinux:8all versions · fixed in 2.9.7-18.el8_9and 2 other packages

Vendor advisories

  • CVE-2023-39615 Red Hat Product Security271 products fixed · 10 known affected

    libxml2: crafted xml can cause global buffer overflow

    libxml2 as a component of Red Hat Enterprise Linux 6 · libxml2-devel as a component of Red Hat Enterprise Linux 6 · libxml2-python as a component of Red Hat Enterprise Linux 6

  • ICSA-24-228-06 CISA1 known affected

    Siemens SINEC NMS

    SINEC NMS

  • SSA-784301 Siemens ProductCERT1 known affected

    SSA-784301: Multiple Vulnerabilities in SINEC NMS Before V3.0

    SINEC NMS

  • ICSA-24-165-04 CISA1 known affected

    Siemens ST7 ScadaConnect

    ST7 ScadaConnect (6NH7997-5DA10-0AA0)

  • SSA-341067 Siemens ProductCERT1 known affected

    SSA-341067: Multiple vulnerabilities in third-party components in ST7 ScadaConnect before V1.1

    ST7 ScadaConnect (6NH7997-5DA10-0AA0)

  • SSA-556635 Siemens ProductCERT1 known affected

    SSA-556635: Multiple Vulnerabilities in Telecontrol Server Basic before V3.1.2.0

    TeleControl Server Basic V3

10 more advisories

Full record on NVD

Description

Xmlsoft Libxml2 v2.11.0 was discovered to contain an out-of-bounds read via the xmlSAX2StartElement() function at /libxml2/SAX2.c. This vulnerability allows attackers to cause a Denial of Service (DoS) via supplying a crafted XML file. NOTE: the vendor's position is that the product does not support the legacy SAX1 interface with custom callbacks; there is a crash even without crafted input.

Technical details

Published
2023-08-29

Frequently asked questions

What is CVE-2023-39615?

Xmlsoft Libxml2 v2.11.0 was discovered to contain an out-of-bounds read via the xmlSAX2StartElement() function at /libxml2/SAX2.c. This vulnerability allows attackers to cause a Denial of Service (DoS) via supplying a crafted XML file. NOTE: the vendor's position is that the product does not support the legacy SAX1 interface with custom callbacks; there is a crash even without crafted input.

Is CVE-2023-39615 actively exploited?

Active exploitation of CVE-2023-39615 has not been confirmed. Its EPSS score was 1.1% on 2026-10-16, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2023-39615?

CVE-2023-39615 has a CVSS v3 base score of 6.5 (MEDIUM severity).

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