[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"repo-stars":3,"vuln-CVE-2022-48870":6},{"stargazers_count":4,"fetched_at":5},7,"2026-06-04T08:53:30.047Z",{"id":7,"descriptions":8,"cisa":9,"weaknesses":10,"exploits":20,"aliases":21,"duplicate_of":9,"upstream":22,"downstream":23,"duplicates":38,"related":39,"reserved_at":9,"published_at":45,"modified_at":46,"state":47,"summary":48,"references_raw":57,"kevs":72,"epss":73,"epss_history":76,"metrics":331,"affected":337},"CVE-2022-48870","In the Linux kernel, the following vulnerability has been resolved:\n\ntty: fix possible null-ptr-defer in spk_ttyio_release\n\nRun the following tests on the qemu platform:\n\nsyzkaller:~# modprobe speakup_audptr\n input: Speakup as /devices/virtual/input/input4\n initialized device: /dev/synth, node (MAJOR 10, MINOR 125)\n speakup 3.1.6: initialized\n synth name on entry is: (null)\n synth probe\n\nspk_ttyio_initialise_ldisc failed because tty_kopen_exclusive returned\nfailed (errno -16), then remove the module, we will get a null-ptr-defer\nproblem, as follow:\n\nsyzkaller:~# modprobe -r speakup_audptr\n releasing synth audptr\n BUG: kernel NULL pointer dereference, address: 0000000000000080\n #PF: supervisor write access in kernel mode\n #PF: error_code(0x0002) - not-present page\n PGD 0 P4D 0\n Oops: 0002 [#1] PREEMPT SMP PTI\n CPU: 2 PID: 204 Comm: modprobe Not tainted 6.1.0-rc6-dirty #1\n RIP: 0010:mutex_lock+0x14/0x30\n Call Trace:\n \u003CTASK>\n  spk_ttyio_release+0x19/0x70 [speakup]\n  synth_release.part.6+0xac/0xc0 [speakup]\n  synth_remove+0x56/0x60 [speakup]\n  __x64_sys_delete_module+0x156/0x250\n  ? fpregs_assert_state_consistent+0x1d/0x50\n  do_syscall_64+0x37/0x90\n  entry_SYSCALL_64_after_hwframe+0x63/0xcd\n \u003C/TASK>\n Modules linked in: speakup_audptr(-) speakup\n Dumping ftrace buffer:\n\nin_synth->dev was not initialized during modprobe, so we add check\nfor in_synth->dev to fix this 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