In the Linux kernel, the following vulnerability has been resolved: net_sched: drr: Fix double list add in class with netem as child qdisc As described in Gerrard's report [1], there are use cases where a netem child qdisc will make the parent qdisc's enqueue callback reentrant. In the case of drr, there won't be a UAF, but the code will add the same classifier to the list twice, which will cause memory corruption. In addition to checking for qlen being zero, this patch checks whether the class was already added to the active_list (cl_is_active) before adding to the list to cover for the re...
In the Linux kernel, the following vulnerability has been resolved: net_sched: drr: Fix double list add in class with netem as child qdisc As described in Gerrard's report [1], there are use cases where a netem child qdisc will make the parent qdisc's enqueue callback reentrant. In the case of drr, there won't be a UAF, but the code will add the same classifier to the list twice, which will cause memory corruption. In addition to checking for qlen being zero, this patch checks whether the class was already added to the active_list (cl_is_active) before adding to the list to cover for the re...
Linux Linux, linux kernel의 현재 전체 버전이 공식 영향 범위(Linux Linux, linux kernel >= 37d9cf1a3ce35de3df6f7d209bfb1f50cf188cea < 5da3aad1a13e7edb8ff0778a444ccf49930313e9, >= 37d9cf1a3ce35de3df6f7d209bfb1f50cf188cea < 4b07ac06b0a712923255aaf2691637693fc7100d, >= 37d9cf1a3ce35de3df6f7d209bfb1f50cf188cea < 2968632880f1792007eedd12eeedf7f6e2b7e9f3, >= 37d9cf1a3ce35de3df6f7d209bfb1f50cf188cea < 4f0ecf50cdf76da95828578a92f130b653ac2fcf, >= 37d9cf1a3ce35de3df6f7d209bfb1f50cf188cea < db205b92dfe0501e5b92fb7cf00971d0e44ba3eb, >= 37d9cf1a3ce35de3df6f7d209bfb1f50cf188cea < 26e75716b94d6ff9be5ea07d63675c4d189f30b4, >= 37d9cf1a3ce35de3df6f7d209bfb1f50cf188cea < ab2248110738d4429668140ad22f530a9ee730e1, >= 37d9cf1a3ce35de3df6f7d209bfb1f50cf188cea < f99a3fbf023e20b626be4b0f042463d598050c9a, >= 5.0, >= 5.0.1 < 5.4.294, >= 5.5 < 5.10.238, >= 5.11 < 5.15.182, >= 5.16 < 6.1.138, >= 6.2 < 6.6.90, >= 6.7 < 6.12.28, >= 6.13 < 6.14.6, 5.0, 6.15)에 포함되는지 확인합니다. OS를 선택하면 해당 OS의 제품·패키지·KB·APAR 확인 명령만 표시됩니다.
조치방안
제3자 참조와 수정 버전 값(5.4.294, 5.10.238, 5.15.182, 6.1.138, 6.6.90, 6.12.28, 6.14.6)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 5.4.294, 5.10.238, 5.15.182, 6.1.138, 6.6.90, 6.12.28, 6.14.6 기준을 충족하는지 확인합니다. 이어서 메모리 손상 관련 오류·공격 흔적이 새로 발생하지 않는지 확인합니다.
