CVE-2026-19542

A flaw was found in glibc. An out-of-bounds array write vulnerability exists within the tdelete function. This issue occurs due to incorrect management of array sizes, which can lead to memory corruption. A local attacker with low privileges could potentially exploit this to cause a denial of service or disclose sensitive information.

This Moderate impact vulnerability in glibc's tdelete function requires a local attacker with low privileges and user interaction to trigger an out-of-bounds write. While it could lead to denial of service or information disclosure, the high attack complexity limits its broader impact on Red Hat systems.

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.

This issue is reachable only through applications that use glibc's tsearch/tdelete APIs and allow construction of extremely deep trees (on the order of a million nodes). Restrict such services to trusted clients and enforce process memory limits so large tree growth is impractical.