In the Linux kernel, the following vulnerability has been resolved: fbdev: fbcon: fix out-of-bounds read in err_out of fbcon_do_set_font() When fbcon_do_set_font() fails (e.g., due to a memory allocation failure inside vc_resize() under heavy memory pressure), it jumps to the `err_out` label to roll back the console state. However, the current rollback logic forgets to restore the `hi_font` state, leading to a severe state machine corruption. Earlier in the function, `set_vc_hi_font()` might be called to change `vc->vc_hi_font_mask` and mutate the screen buffer. If `vc_resize()` subsequentl...
In the Linux kernel, the following vulnerability has been resolved: fbdev: fbcon: fix out-of-bounds read in err_out of fbcon_do_set_font() When fbcon_do_set_font() fails (e.g., due to a memory allocation failure inside vc_resize() under heavy memory pressure), it jumps to the `err_out` label to roll back the console state. However, the current rollback logic forgets to restore the `hi_font` state, leading to a severe state machine corruption. Earlier in the function, `set_vc_hi_font()` might be called to change `vc->vc_hi_font_mask` and mutate the screen buffer. If `vc_resize()` subsequentl...
Linux Linux, linux kernel의 현재 전체 버전이 공식 영향 범위(Linux Linux, linux kernel >= 868749a7456dc48e93887a8474194e2ee6d6c21f < cb016bcb40c81e7b19c4ae6143babb366dae8e20, >= ebd6f886aa2447fcfcdce5450c9e1028e1d681bb < ac562193c36696513ae196171892e9338475c4bc, >= a5a923038d70d2d4a86cb4e3f32625a5ee6e7e24 < 3618a4c5b2591cfa83efe74f5b18c2d02b35c3f5, >= a5a923038d70d2d4a86cb4e3f32625a5ee6e7e24 < a7a526fbc847f07ad3a503c7382189be5ab68574, >= a5a923038d70d2d4a86cb4e3f32625a5ee6e7e24 < b5bb2c696e140c399cb874def2feedf61dee27d6, >= a5a923038d70d2d4a86cb4e3f32625a5ee6e7e24 < 076b1aa65f77a49bce5a48a4a55a397cfcafa2b8, >= a5a923038d70d2d4a86cb4e3f32625a5ee6e7e24 < 39815715cbcfabb16fc8c5f4a23deeda20f5df62, >= a5a923038d70d2d4a86cb4e3f32625a5ee6e7e24 < 8fdc8c2057eea08d40ce2c8eed41ff9e451c65c2, >= f08ccb792d3eaf1dc62d8cbf6a30d6522329f660, >= 5.10.249 < 5.10.261, >= 5.15.64 < 5.15.212, >= 5.19.6 < 5.20, >= 6.0, >= 5.19.6 < 6.0, >= 6.0.1 < 6.1.178, >= 6.2 < 6.6.145, >= 6.7 < 6.12.96, >= 6.13 < 6.18.39, >= 6.19 < 7.1.3, 6.0)에 포함되는지 확인합니다. OS를 선택하면 해당 OS의 제품·패키지·KB·APAR 확인 명령만 표시됩니다.
조치방안
제3자 참조와 수정 버전 값(5.10.261, 5.15.212, 6.0, 6.1.178, 6.6.145, 6.12.96, 6.18.39, 7.1.3)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 5.10.261, 5.15.212, 6.0, 6.1.178, 6.6.145, 6.12.96, 6.18.39, 7.1.3 기준을 충족하는지 확인합니다. 이어서 메모리 손상 관련 오류·공격 흔적이 새로 발생하지 않는지 확인합니다.
