In the Linux kernel, the following vulnerability has been resolved: tty: n_gsm: fix race condition in status line change on dead connections gsm_cleanup_mux() cleans up the gsm by closing all DLCIs, stopping all timers, removing the virtual tty devices and clearing the data queues. This procedure, however, may cause subsequent changes of the virtual modem status lines of a DLCI. More data is being added the outgoing data queue and the deleted kick timer is restarted to handle this. At this point many resources have already been removed by the cleanup procedure. Thus, a kernel panic occurs....
In the Linux kernel, the following vulnerability has been resolved: tty: n_gsm: fix race condition in status line change on dead connections gsm_cleanup_mux() cleans up the gsm by closing all DLCIs, stopping all timers, removing the virtual tty devices and clearing the data queues. This procedure, however, may cause subsequent changes of the virtual modem status lines of a DLCI. More data is being added the outgoing data queue and the deleted kick timer is restarted to handle this. At this point many resources have already been removed by the cleanup procedure. Thus, a kernel panic occurs....
Linux Linux, linux kernel의 현재 전체 버전이 공식 영향 범위(Linux Linux, linux kernel >= dd37f657387853623f20c1b2482afbb9cd8ece33 < 81a4dd5e6c78f5d8952fa8c9d36565db1fe01444, >= c568f7086c6e771c77aad13d727c70ef70e07243 < df6cfab66ff2a44bd23ad5dd5309cb3421bb6593, >= c568f7086c6e771c77aad13d727c70ef70e07243 < 19d34b73234af542cc8a218cf398dee73cdb1890, >= c568f7086c6e771c77aad13d727c70ef70e07243 < ce4df90333c4fe65acb8b5089fdfe9b955ce976a, >= c568f7086c6e771c77aad13d727c70ef70e07243 < 3a75b205de43365f80a33b98ec9289785da56243, >= d834aba5f30d9a6f98f4ca1eb07e501f1989331c, >= 692e847a8e6607909c4a3f98ab16ccee7849bd11, >= 5.15.61 < 5.15.138, >= 5.18.18 < 5.19, >= 5.19.2 < 5.20, >= 6.0, >= 5.19.2 < 6.1.62, >= 6.2 < 6.5.11, >= 6.6 < 6.6.1)에 포함되는지 확인합니다. OS를 선택하면 해당 OS의 제품·패키지·KB·APAR 확인 명령만 표시됩니다.
조치방안
구조화된 수정 버전 값(5.15.138, 5.19, 6.1.62, 6.5.11, 6.6.1)은 참고용입니다. 공급사 공식 보안 권고에서 제품·에디션·설치 방식별 수정 기준을 확인한 뒤 적용합니다.
조치 후 확인사항
패치 후 같은 명령으로 전체 버전을 다시 확인해 Linux Linux, linux kernel 5.15.138, 5.19, 6.1.62, 6.5.11, 6.6.1 기준을 충족하는지 확인합니다. 이어서 경쟁 조건·TOCTOU 관련 오류·공격 흔적이 새로 발생하지 않는지 확인합니다.
