Vulnerability 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 Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | < 3.16.72 |
| Canonical | Ubuntu Linux | 16.04 |
| Debian | Debian Linux | 8.0 |
| F5 | Traffix Signaling Delivery Controller | 5.0.0 |
| Netapp | Active Iq Unified Manager | >= 9.5 |
| Netapp | Snapprotect | - |
| Netapp | Solidfire \& Hci Management Node | - |
| Netapp | Solidfire \& Hci Storage Node | - |
| Netapp | Storage Replication Adapter For Clustered Data Ontap | - |
| Netapp | Vasa Provider For Clustered Data Ontap | >= 7.2 |
| Netapp | Virtual Storage Console | >= 7.2 |
| Netapp | Hci Compute Node | - |
| Opensuse | Leap | 15.0 |
Related Weaknesses (CWE)
References
- http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00014.htmlMailing ListThird Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00025.htmlMailing ListThird Party Advisory
- http://www.securityfocus.com/bid/108196Third Party AdvisoryVDB Entry
- https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=b90cdPatchVendor Advisory
- https://github.com/torvalds/linux/commit/b90cd6f2b905905fb42671009dc0e27c310a16aPatchVendor Advisory
- https://lists.debian.org/debian-lts-announce/2019/08/msg00016.htmlMailing ListThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2019/08/msg00017.htmlMailing ListThird Party Advisory
- https://seclists.org/bugtraq/2019/Aug/13Mailing ListThird Party Advisory
- https://seclists.org/bugtraq/2019/Aug/18Mailing ListThird Party Advisory
- https://security.netapp.com/advisory/ntap-20190719-0003/Third Party Advisory
- https://support.f5.com/csp/article/K11225249Third Party Advisory
- https://usn.ubuntu.com/4076-1/Third Party Advisory
- https://www.debian.org/security/2019/dsa-4495Third Party Advisory
- https://www.debian.org/security/2019/dsa-4497Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00014.htmlMailing ListThird Party Advisory
FAQ
What is CVE-2018-20836?
CVE-2018-20836 is a vulnerability with a CVSS score of 8.1 (HIGH). 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.
How severe is CVE-2018-20836?
CVE-2018-20836 has been rated HIGH with a CVSS base score of 8.1/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2018-20836?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel, Canonical Ubuntu Linux, Debian Debian Linux, F5 Traffix Signaling Delivery Controller, Netapp Active Iq Unified Manager.