In the Linux kernel, the following vulnerability has been resolved: dcache: Limit the minimal number of bucket to two There is an OOB read problem on dentry_hashtable when user sets 'dhash_entries=1': BUG: unable to handle page fault for address: ffff888b30b774b0 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page Oops: Oops: 0000 [#1] SMP PTI RIP: 0010:__d_lookup+0x56/0x120 Call Trace: d_lookup.cold+0x16/0x5d lookup_dcache+0x27/0xf0 lookup_one_qstr_excl+0x2a/0x180 start_dirop+0x55/0xa0 simple_start_creating+0x8d/0xa0 debugfs_start_creating+0x8c/0x180 debug...
In the Linux kernel, the following vulnerability has been resolved: dcache: Limit the minimal number of bucket to two There is an OOB read problem on dentry_hashtable when user sets 'dhash_entries=1': BUG: unable to handle page fault for address: ffff888b30b774b0 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page Oops: Oops: 0000 [#1] SMP PTI RIP: 0010:__d_lookup+0x56/0x120 Call Trace: d_lookup.cold+0x16/0x5d lookup_dcache+0x27/0xf0 lookup_one_qstr_excl+0x2a/0x180 start_dirop+0x55/0xa0 simple_start_creating+0x8d/0xa0 debugfs_start_creating+0x8c/0x180 debug...
Linux Linux, linux kernel의 현재 전체 버전이 공식 영향 범위(Linux Linux, linux kernel >= 99d263d4c5b2f541dfacb5391e22e8c91ea982a6 < 45b06bb5ea96f75ad81d7ef446f832ea6b0026fe, >= 99d263d4c5b2f541dfacb5391e22e8c91ea982a6 < 426ef05e82ee52c8d0e95fc0808b7383d8352d73, >= 99d263d4c5b2f541dfacb5391e22e8c91ea982a6 < ddd57ebce245f9c7e2f6902a6c087d6186d2385d, >= 99d263d4c5b2f541dfacb5391e22e8c91ea982a6 < 755b40903eff563768d4d96fd4ef51ec48adde3b, >= 99d263d4c5b2f541dfacb5391e22e8c91ea982a6 < 5718df131ab78897a9dd1f2e71c3ba732d4392af, >= 99d263d4c5b2f541dfacb5391e22e8c91ea982a6 < 277cedabb0ab86baae83fa58218be13c6d3e5526, >= 99d263d4c5b2f541dfacb5391e22e8c91ea982a6 < f08fe8891c3eeb63b73f9f1f6d97aa629c821579, >= d4c96061fddd129778ce8b70fb093aa532f422d0, >= be2378cbffe50ce0161f0fdee914adee98af53dc, >= a8be8af18485f9fade90e1743d940252a39eec84, >= b5cf3193759f7cd1cfbeef11f5cf067bbce22e55, >= 3.10.55 < 3.11, >= 3.12.29 < 3.13, >= 3.14.19 < 3.15, >= 3.16.3 < 3.17, >= 3.17, >= 3.17.1 < 6.1.175, >= 6.2 < 6.6.136, >= 6.7 < 6.12.83, >= 6.13 < 6.18.24)에 포함되는지 확인합니다. OS를 선택하면 해당 OS의 제품·패키지·KB·APAR 확인 명령만 표시됩니다.
조치방안
제3자 참조와 수정 버전 값(3.11, 3.13, 3.15, 3.17, 6.1.175, 6.6.136, 6.12.83, 6.18.24, 6.19.14, 7.0.1)은 보조 근거로만 사용하고, 공급사 공식 보안 권고에서 조치 기준을 재확인합니다.
조치 후 확인사항
패치 후 같은 명령으로 전체 버전을 다시 확인해 Linux Linux, linux kernel 3.11, 3.13, 3.15, 3.17, 6.1.175, 6.6.136, 6.12.83, 6.18.24, 6.19.14, 7.0.1 기준을 충족하는지 확인합니다. 이어서 메모리 손상 관련 오류·공격 흔적이 새로 발생하지 않는지 확인합니다.
