CVE-2025-68239
UnknownSummary
W jądrze systemu Linux zidentyfikowano podatność w funkcji binfmt_misc, która nie przywraca dostępu do zapisu przed zamknięciem plików otwartych przez open_exec(). W przypadku wystąpienia błędu, zamknięcie pliku nie przywraca uprawnień do zapisu, co może prowadzić do niepowodzenia kolejnych operacji zapisu na tym samym pliku.
Risk Assessment
Organizacje mogą napotkać problemy z zapisem do plików wykonywalnych, co może prowadzić do awarii aplikacji lub utraty danych. Potencjalne problemy z dostępem do plików mogą wpłynąć na stabilność systemów korzystających z jądra Linux.
Recommendation
Zaleca się aktualizację jądra systemu Linux do najnowszej wersji, aby usunąć tę podatność. Należy również monitorować operacje zapisu na plikach wykonywalnych w celu wykrycia ewentualnych problemów.
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Original NVD description (English source)
In the Linux kernel, the following vulnerability has been resolved: binfmt_misc: restore write access before closing files opened by open_exec() bm_register_write() opens an executable file using open_exec(), which internally calls do_open_execat() and denies write access on the file to avoid modification while it is being executed. However, when an error occurs, bm_register_write() closes the file using filp_close() directly. This does not restore the write permission, which may cause subsequent write operations on the same file to fail. Fix this by calling exe_file_allow_write_access() before filp_close() to restore the write permission properly.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS

