CVE-2018-20836
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.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (5.09%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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 3.1
- 8.1 HIGHCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 5.09% probability · 92th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-362, CWE-416
- Affected
- linux/linux kernel · canonical/ubuntu linux · debian/debian linux · f5/traffix signaling delivery controller · netapp/active iq unified manager · 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 · netapp/virtual storage console · netapp/hci compute node · opensuse/leap
- Source
- cve@mitre.org
EPSS 5.1% since 27 October 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00014.htmlMailing List, Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00025.htmlMailing List, Third Party Advisory
- http://www.securityfocus.com/bid/108196Third Party Advisory, VDB Entry
- https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=b90cd6f2b905905fb42671009dc0e27c310a16aePatch, Vendor Advisory
- https://github.com/torvalds/linux/commit/b90cd6f2b905905fb42671009dc0e27c310a16aePatch, Vendor Advisory
- https://lists.debian.org/debian-lts-announce/2019/08/msg00016.htmlMailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2019/08/msg00017.htmlMailing List, Third Party Advisory
- https://seclists.org/bugtraq/2019/Aug/13Mailing List, Third Party Advisory
- https://seclists.org/bugtraq/2019/Aug/18Mailing List, Third 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 List, Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00025.htmlMailing List, Third Party Advisory
- http://www.securityfocus.com/bid/108196Third Party Advisory, VDB Entry
- https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=b90cd6f2b905905fb42671009dc0e27c310a16aePatch, Vendor Advisory
- https://github.com/torvalds/linux/commit/b90cd6f2b905905fb42671009dc0e27c310a16aePatch, Vendor Advisory
- https://lists.debian.org/debian-lts-announce/2019/08/msg00016.htmlMailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2019/08/msg00017.htmlMailing List, Third Party Advisory
- https://seclists.org/bugtraq/2019/Aug/13Mailing List, Third Party Advisory
- https://seclists.org/bugtraq/2019/Aug/18Mailing List, Third 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
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.