CVE-2026-25210
libexpat: libexpat: Information disclosure and data integrity issues due to integer overflow in buffer reallocation
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · January 30, 2026
Updated · June 28, 2026
Description
A flaw was found in libexpat. A local attacker could exploit an integer overflow vulnerability in the doContent function. This flaw occurs because the buffer size is not properly determined during tag buffer reallocation, which can lead to memory corruption. Successful exploitation may result in information disclosure and data integrity issues.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 3.1 · 6.9CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L
CWE-190 · Integer Overflow or Wraparound