CVE-2018-20836 - Vulncode-DB

CVE-2018-20836 (NVD)

2019-05-07

An issue was discovered in the Linux kernel before 4.20. There is a race condition in smp_task_timedout() and smp_task_done() in drivers/scsi/libsas/sas_expander.c, leading to a use-after-free.

Products	Ubuntu_linux, Debian_linux, Traffix_signaling_delivery_controller, Linux_kernel, Active_iq_unified_manager, Hci_compute_node, Snapprotect, Solidfire_\&_hci_management_node, Solidfire_\&_hci_storage_node, Storage_replication_adapter_for_clustered_data_ontap, Vasa_provider_for_clustered_data_ontap, Virtual_storage_console, Leap
Type	Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') (CWE-362) Use After Free (CWE-416)
First patch	- None (likely due to unavailable code)
Patches	• https://github.com/torvalds/linux/commit/b90cd6f2b905905fb42671009dc0e27c310a16ae • https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=b90cd6f2b905905fb42671009dc0e27c310a16ae
Links	• https://www.debian.org/security/2019/dsa-4497 • https://usn.ubuntu.com/4076-1/ • http://www.securityfocus.com/bid/108196 • https://lists.debian.org/debian-lts-announce/2019/08/msg00016.html • https://security.netapp.com/advisory/ntap-20190719-0003/ More/Less (7) • http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00025.html • https://seclists.org/bugtraq/2019/Aug/18 • https://www.debian.org/security/2019/dsa-4495 • https://seclists.org/bugtraq/2019/Aug/13 • https://support.f5.com/csp/article/K11225249 • http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00014.html • https://lists.debian.org/debian-lts-announce/2019/08/msg00017.html