CVE-2026-48986: falha de média gravidade em mcdope pam_usb
pam_usb: Infinite loop DoS in process-tree walk when parent process exits during authentication
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ssvc Trackcvss 4.7epss 0.1%
pam_usb provides hardware authentication for Linux using removable media. In pam_usb 0.9.1 and earlier, usb_get_process_parent_id() can cause an infinite loop DoS because it does not initialize *ppid on failure. In pusb_local_login(), the same variable is reused as input and output in a process-tree while loop; if /proc/<pid>/stat cannot be read (for example, when an ancestor process exits during authentication), the PID is not updated and the loop does not terminate. This hangs the authenticating process (such as sudo, sshd, or login) until it is forcibly terminated. This issue has been fixed in version 0.9.2.
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
Produtos afetados
mcdope · pam_usbCVEs relacionadas — mcdope pam_usb
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