libexpat before 2.8.2 has an integer overflow in storeAtts.

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Integer Overflow or Wraparound

Overview Affected versions of this package are vulnerable to Integer Overflow or Wraparound due to improper handling of integer values in the storeAtts function. An attacker can cause memory corruption or potentially execute arbitrary code by providing specially crafted input that triggers the...

CVE-2026-56403

libexpat before 2.8.2 has an integer overflow in storeAtts...

ALPINE-CVE-2026-56403

libexpat before 2.8.2 has an integer overflow in storeAtts...

UBUNTU-CVE-2026-56403

libexpat before 2.8.2 has an integer overflow in storeAtts...

CVE-2026-56403

libexpat before 2.8.2 has an integer overflow in storeAtts...

EUVD-2026-38180

libexpat before 2.8.2 has an integer overflow in storeAtts...

CVE-2026-56403

libexpat before 2.8.2 has an integer overflow in storeAtts...

CVE-2026-56403

CVE-2026-56403 affects libexpat prior to 2.8.2, with an integer overflow in storeAtts. Local attack vector, high complexity, no user interaction, requires no privileges. Impact: confidentiality and integrity likely high; availability low. Base score 6.9 (CVSS 3.1). No exploitation details or reme...

CVE-2026-56403

libexpat before 2.8.2 has an integer overflow in storeAtts...

PT-2026-51239

Name of the Vulnerable Software and Affected Versions libexpat versions prior to 2.8.2 Description An integer overflow exists in the storeAtts function. An integer overflow occurs when an arithmetic operation attempts to create a numeric value that is outside of the range that can be represented...

Linux Distros Unpatched Vulnerability : CVE-2026-56403

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - libexpat before 2.8.2 has an integer overflow in storeAtts. CVE-2026-56403 Note that Nessus relies on the presence of the package as reported by the vendor...

Astra Linux – Vulnerabilities in Firefox, Thunderbird, and Expat

In Expat also known as libexpat, before version 2.4.3, a left shift of 29 or more in the storeAtts function in xmlparse.c could lead to improper realloc behavior. This could result in allocating too few bytes, or only freeing memory after it was no longer needed...

Astra Linux – Vulnerabilities in Firefox, Thunderbird, Expat, LibXMLTok

The issue with integer overflow occurs in storeAtts in the xmlparse.c file, within the Expat library also known as libexpat, before version 2.4.3...

Unity Linux 20.1060e / 20.1070e Security Update: expat (UTSA-2026-017351)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-017351 advisory. In Expat aka libexpat before 2.4.3, a left shift by 29 or more places in the storeAtts function in xmlparse.c can lead to realloc misbehavior e.g., allocating too fe...

Unity Linux 20.1060e / 20.1070e Security Update: expat (UTSA-2026-017354)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-017354 advisory. storeAtts in xmlparse.c in Expat aka libexpat before 2.4.3 has an integer overflow. Tenable has extracted the preceding description block directly from the Unity Lin...

expat: Integer overflow in storeAtts in xmlparse.c

expat libexpat is susceptible to a software flaw that causes process interruption. When processing a large number of prefixed XML attributes on a single tag can libexpat can terminate unexpectedly due to integer overflow. The highest threat from this vulnerability is to availability,...

expat: Integer overflow in storeAtts in xmlparse.c

expat libexpat is susceptible to a software flaw that causes process interruption. When processing a large number of prefixed XML attributes on a single tag can libexpat can terminate unexpectedly due to integer overflow. The highest threat from this vulnerability is to availability,...

Siemens SIMATIC S7-1500 Integer Overflow or Wraparound (CVE-2022-22827)

storeAtts in xmlparse.c in Expat aka libexpat before 2.4.3 has an integer overflow. This plugin only works with Tenable.ot. Please visit https://www.tenable.com/products/tenable-ot for more information. %NASLMINLEVEL 80900 C Tenable, Inc. include'compat.inc'; if description scriptid504336;...

JLSEC-2025-42 In Expat (aka libexpat) before 2.4.3, a left shift by 29 (or more) places in the storeAtts function ...

In Expat aka libexpat before 2.4.3, a left shift by 29 or more places in the storeAtts function in xmlparse.c can lead to realloc misbehavior e.g., allocating too few bytes, or only freeing memory...