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CVE-2026-95510 is an uninitialized-memory vulnerability in GNU Inetutils libinetutils' setsig() function, used by rlogin, rlogind, and telnetd. The function initializes signal masks but fails to initialize struct sigaction.sa_flags before OR-ing SA_RESTART into it. Residual stack data can therefore retain SA_RESTORER in sa_flags and leave sa_restorer as an uninitialized function pointer on architectures that honor application-supplied restorers. The flaw has existed since GNU Inetutils 1.9. Telnetd crashes triggered during SIGCHLD handling have been reproducibly observed; potential code execution through manipulation or use of the uninitialized signal-restorer pointer has not been confirmed.
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No public exploit code observed for this vulnerability.
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Cross-references every affected SKU, including bundled OEM variants.
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