The vulnerability CVE-2025-4802 involves a flaw in the GNU C Library (glibc) where static setuid binaries that invoke dlopen(), including internal calls after setlocale() or NSS functions like getaddrinfo(), may improperly use LD_LIBRARY_PATH to locate shared libraries. This behavior can allow a local attacker to load malicious shared libraries, potentially escalating privileges and executing arbitrary code. Red Hat has not found any such vulnerable static setuid binaries in their Enterprise Linux distribution but acknowledges that custom setuid programs might exist. The issue is rated moderate severity and a patch is available to address it.

If exploited, a local attacker could escalate privileges and execute arbitrary code with the privileges of the vulnerable static setuid binary. The flaw also poses risks to confidentiality and availability by potentially allowing unauthorized file reads or causing program crashes. However, exploitation requires a specific binary type (static setuid calling dlopen), which Red Hat does not ship by default, limiting the practical impact.

A patch is available for this vulnerability and should be applied to affected systems. No effective mitigations other than patching currently meet Red Hat's criteria for ease of use and applicability. Users should ensure that any custom static setuid binaries are reviewed and updated accordingly. Red Hat strongly discourages the use of custom setuid programs due to inherent security risks.