CVE-2018-20836

Advisory lineage Upstream: 0 Downstream: 28
Modified
Published: 07 May 2019, 13:04
Last modified:05 Aug 2024, 12:12

Vulnerability Summary

Overall Risk (default)
high
70/100
CVSS Score
9.3 HIGH
v2.0 (nvd)
EPSS Score
4.06% LOW
4% probability +0.09%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

07 May 2019, 13:04
Published
Vulnerability first disclosed
05 Aug 2024, 12:12
Last Modified
Vulnerability information updated

Description

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.

CVSS Metrics

  • v3.1•HIGH•Score: 8.1CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
  • v2.0•HIGH•Score: 9.3AV:N/AC:M/Au:N/C:C/I:C/A:C

EPSS Trends

Current EPSS score: 4.06%• Percentile: 89%

Techniques & Countermeasures

  • CWE-362•Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

    The product contains a concurrent code sequence that requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence operating concurrently.

  • CWE-416•Use After Free

    The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

Affected Systems

  • canonical•ubuntu_linux

    16.04

  • debian•debian_linux

    8.0 | 9.0 | 10.0

  • f5•traffix_signaling_delivery_controller

    5.0.0 | 5.1.0

  • linux•linux_kernel

    < 3.16.72 | ≥ 3.17, < 3.18.140 | ≥ 3.19, < 4.4.180 | ≥ 4.5, < 4.9.175 | ≥ 4.10, < 4.14.118 | ≥ 4.15, < 4.19.42

  • netapp•active_iq_unified_manager

    ≥ 9.5

  • netapp•hci_compute_node_firmware

    na

  • netapp•snapprotect

    na

  • netapp•solidfire_\&_hci_management_node

    na

  • netapp•solidfire_\&_hci_storage_node

    na

  • netapp•storage_replication_adapter_for_clustered_data_ontap

    na

  • netapp•vasa_provider_for_clustered_data_ontap

    ≥ 7.2

  • netapp•virtual_storage_console

    ≥ 7.2

  • opensuse•leap

    15.0 | 15.1

References (14)