In the Linux kernel, the following vulnerability has been resolved: net_sched: red: fix a race in __red_change() Gerrard Tai reported a race condition in RED, whenever SFQ perturb timer fires at the wrong time. The race is as follows: CPU 0 CPU 1 [1]: lock root [2]: qdisc_tree_flush_backlog() [3]: unlock root | | [5]: lock root | [6]: rehash | [7]: qdisc_tree_reduce_backlog() | [4]: qdisc_put() This can be abused to underflow a parent's qlen. Calling qdisc_purge_queue() instead of qdisc_tree_flush_backlog() should fix the race, because all packets will be purged from the qdisc before releas...
In the Linux kernel, the following vulnerability has been resolved: net_sched: red: fix a race in __red_change() Gerrard Tai reported a race condition in RED, whenever SFQ perturb timer fires at the wrong time. The race is as follows: CPU 0 CPU 1 [1]: lock root [2]: qdisc_tree_flush_backlog() [3]: unlock root | | [5]: lock root | [6]: rehash | [7]: qdisc_tree_reduce_backlog() | [4]: qdisc_put() This can be abused to underflow a parent's qlen. Calling qdisc_purge_queue() instead of qdisc_tree_flush_backlog() should fix the race, because all packets will be purged from the qdisc before releas...
Linux Linux, linux kernel, debian linux의 현재 전체 버전이 공식 영향 범위(Linux Linux, linux kernel, debian linux >= 0c8d13ac96070000da33f394f45e9c19638483c5 < 2790c4ec481be45a80948d059cd7c9a06bc37493, >= 0c8d13ac96070000da33f394f45e9c19638483c5 < a1bf6a4e9264a685b0e642994031f9c5aad72414, >= 0c8d13ac96070000da33f394f45e9c19638483c5 < 110a47efcf23438ff8d31dbd9c854fae2a48bf98, >= 0c8d13ac96070000da33f394f45e9c19638483c5 < f569984417a4e12c67366e69bdcb752970de921d, >= 0c8d13ac96070000da33f394f45e9c19638483c5 < 2a71924ca4af59ffc00f0444732b6cd54b153d0e, >= 0c8d13ac96070000da33f394f45e9c19638483c5 < 4b755305b2b0618e857fdadb499365b5f2e478d1, >= 0c8d13ac96070000da33f394f45e9c19638483c5 < 444ad445df5496a785705019268a8a84b84484bb, >= 0c8d13ac96070000da33f394f45e9c19638483c5 < 85a3e0ede38450ea3053b8c45d28cf55208409b8, >= 5.0, >= 5.0 < 5.4.295, >= 5.5 < 5.10.239, >= 5.11 < 5.15.186, >= 5.16 < 6.1.142, >= 6.2 < 6.6.94, >= 6.7 < 6.12.34, >= 6.13 < 6.15.3, 6.16, 11.0)에 포함되는지 확인합니다. OS를 선택하면 해당 OS의 제품·패키지·KB·APAR 확인 명령만 표시됩니다.
조치방안
제3자 참조와 수정 버전 값(5.4.295, 5.10.239, 5.15.186, 6.1.142, 6.6.94, 6.12.34, 6.15.3)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, debian linux 5.4.295, 5.10.239, 5.15.186, 6.1.142, 6.6.94, 6.12.34, 6.15.3 기준을 충족하는지 확인합니다. 이어서 경쟁 조건·TOCTOU 관련 오류·공격 흔적이 새로 발생하지 않는지 확인합니다.
