In the Linux kernel, the following vulnerability has been resolved: regmap: Fix possible double-free in regcache_rbtree_exit() In regcache_rbtree_insert_to_block(), when 'present' realloc failed, the 'blk' which is supposed to assign to 'rbnode->block' will be freed, so 'rbnode->block' points a freed memory, in the error handling path of regcache_rbtree_init(), 'rbnode->block' will be freed again in regcache_rbtree_exit(), KASAN will report double-free as follows: BUG: KASAN: double-free or invalid-free in kfree+0xce/0x390 Call Trace: slab_free_freelist_hook+0x10d/0x240 kfree+0xce/0x390 reg...
In the Linux kernel, the following vulnerability has been resolved: regmap: Fix possible double-free in regcache_rbtree_exit() In regcache_rbtree_insert_to_block(), when 'present' realloc failed, the 'blk' which is supposed to assign to 'rbnode->block' will be freed, so 'rbnode->block' points a freed memory, in the error handling path of regcache_rbtree_init(), 'rbnode->block' will be freed again in regcache_rbtree_exit(), KASAN will report double-free as follows: BUG: KASAN: double-free or invalid-free in kfree+0xce/0x390 Call Trace: slab_free_freelist_hook+0x10d/0x240 kfree+0xce/0x390 reg...
Linux Linux, linux kernel의 현재 전체 버전이 공식 영향 범위(Linux Linux, linux kernel >= 3f4ff561bc88b074d5e868dde4012d89cbb06c87 < e72dce9afbdbfa70d9b44f5908a50ff6c4858999, >= 3f4ff561bc88b074d5e868dde4012d89cbb06c87 < fc081477b47dfc3a6cb50a96087fc29674013fc2, >= 3f4ff561bc88b074d5e868dde4012d89cbb06c87 < 758ced2c3878ff789801e6fee808e185c5cf08d6, >= 3f4ff561bc88b074d5e868dde4012d89cbb06c87 < 3dae1a4eced3ee733d7222e69b8a55caf2d61091, >= 3f4ff561bc88b074d5e868dde4012d89cbb06c87 < 1cead23c1c0bc766dacb900a3b0269f651ad596f, >= 3f4ff561bc88b074d5e868dde4012d89cbb06c87 < 36e911a16b377bde0ad91a8c679069d0d310b1a6, >= 3f4ff561bc88b074d5e868dde4012d89cbb06c87 < 50cc1462a668dc62949a1127388bc3af785ce047, >= 3f4ff561bc88b074d5e868dde4012d89cbb06c87 < 55e6d8037805b3400096d621091dfbf713f97e83, >= 3.12, >= 3.12 < 4.4.291, >= 4.5 < 4.9.289, >= 4.10 < 4.14.254, >= 4.15 < 4.19.215, >= 4.20 < 5.4.157, >= 5.5 < 5.10.77, >= 5.11 < 5.14.16, 5.15)에 포함되는지 확인합니다. OS를 선택하면 해당 OS의 제품·패키지·KB·APAR 확인 명령만 표시됩니다.
조치방안
구조화된 수정 버전 값(4.4.291, 4.9.289, 4.14.254, 4.19.215, 5.4.157, 5.10.77, 5.14.16)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 4.4.291, 4.9.289, 4.14.254, 4.19.215, 5.4.157, 5.10.77, 5.14.16 기준을 충족하는지 확인합니다. 이어서 유형 미확정 관련 오류·공격 흔적이 새로 발생하지 않는지 확인합니다.
