In the Linux kernel, the following vulnerability has been resolved: arm64/entry: Mask DAIF in cpu_switch_to(), call_on_irq_stack() `cpu_switch_to()` and `call_on_irq_stack()` manipulate SP to change to different stacks along with the Shadow Call Stack if it is enabled. Those two stack changes cannot be done atomically and both functions can be interrupted by SErrors or Debug Exceptions which, though unlikely, is very much broken : if interrupted, we can end up with mismatched stacks and Shadow Call Stack leading to clobbered stacks. In `cpu_switch_to()`, it can happen when SP_EL0 points to...
In the Linux kernel, the following vulnerability has been resolved: arm64/entry: Mask DAIF in cpu_switch_to(), call_on_irq_stack() `cpu_switch_to()` and `call_on_irq_stack()` manipulate SP to change to different stacks along with the Shadow Call Stack if it is enabled. Those two stack changes cannot be done atomically and both functions can be interrupted by SErrors or Debug Exceptions which, though unlikely, is very much broken : if interrupted, we can end up with mismatched stacks and Shadow Call Stack leading to clobbered stacks. In `cpu_switch_to()`, it can happen when SP_EL0 points to...
Linux Linux, SIMATIC CN 4100, linux kernel의 현재 전체 버전이 공식 영향 범위(Linux Linux, SIMATIC CN 4100, linux kernel >= 3f225f29c69c13ce1cbdb1d607a42efeef080056 < f7e0231eeaa33245c649fac0303cf97209605446, >= 402d2b1d54b7085d0c3bfd01fd50c2701dde64b3 < 407047893a64399f2d2390ff35cc6061107d805d, >= 4403c7b7e5e1ad09a266b6e399fd7bf97931508e < a6b0cb523eaa01efe8a3f76ced493ba60674c6e6, >= 59b37fe52f49955791a460752c37145f1afdcad1 < 9433a5f437b0948d6a2d8a02ad7a42ab7ca27a61, >= 59b37fe52f49955791a460752c37145f1afdcad1 < 708fd522b86d2a9544c34ec6a86fa3fc23336525, >= 59b37fe52f49955791a460752c37145f1afdcad1 < 0f67015d72627bad72da3c2084352e0aa134416b, >= 59b37fe52f49955791a460752c37145f1afdcad1 < d42e6c20de6192f8e4ab4cf10be8c694ef27e8cb, >= e47ce4f11e26fa3ea99b09521da8b3ac3a7b578d, >= 5.10.180 < 5.10.210, >= 5.15.111 < 5.15.190, >= 6.1.28 < 6.1.149, >= 6.2.15 < 6.3, >= 6.3, < V5.0, >= 6.2.15 < 6.6.101, >= 6.7 < 6.12.41, >= 6.13 < 6.15.9, 6.16, 11.0)에 포함되는지 확인합니다. OS를 선택하면 해당 OS의 제품·패키지·KB·APAR 확인 명령만 표시됩니다.
조치방안
제3자 참조와 수정 버전 값(5.10.210, 5.15.190, 6.1.149, 6.6.101, 6.12.41, 6.15.9)은 보조 근거로만 사용하고, 공급사 공식 보안 권고에서 조치 기준을 재확인합니다.
조치 후 확인사항
패치 후 같은 명령으로 전체 버전을 다시 확인해 Linux Linux, SIMATIC CN 4100, linux kernel 5.10.210, 5.15.190, 6.1.149, 6.6.101, 6.12.41, 6.15.9 기준을 충족하는지 확인합니다. 이어서 유형 미확정 관련 오류·공격 흔적이 새로 발생하지 않는지 확인합니다.
