Vulnerability Description
An issue was discovered in the Linux kernel before 4.18.7. In block/blk-core.c, there is an __blk_drain_queue() use-after-free because a certain error case is mishandled.
CVSS Score
7.8
HIGH
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | < 4.18.7 |
Related Weaknesses (CWE)
References
- http://packetstormsecurity.com/files/154059/Slackware-Security-Advisory-Slackwar
- http://packetstormsecurity.com/files/154408/Kernel-Live-Patch-Security-Notice-LS
- http://packetstormsecurity.com/files/154951/Kernel-Live-Patch-Security-Notice-LS
- https://access.redhat.com/errata/RHSA-2019:3055
- https://access.redhat.com/errata/RHSA-2019:3076
- https://access.redhat.com/errata/RHSA-2019:3089
- https://access.redhat.com/errata/RHSA-2019:3217
- https://access.redhat.com/errata/RHSA-2020:0100
- https://access.redhat.com/errata/RHSA-2020:0103
- https://access.redhat.com/errata/RHSA-2020:0543
- https://access.redhat.com/errata/RHSA-2020:0664
- https://access.redhat.com/errata/RHSA-2020:0698
- https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.18.7Mailing ListRelease NotesVendor Advisory
- https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=54648Mailing ListPatchVendor Advisory
- https://github.com/torvalds/linux/commit/54648cf1ec2d7f4b6a71767799c45676a138ca2PatchThird Party Advisory
FAQ
What is CVE-2018-20856?
CVE-2018-20856 is a vulnerability with a CVSS score of 7.8 (HIGH). An issue was discovered in the Linux kernel before 4.18.7. In block/blk-core.c, there is an __blk_drain_queue() use-after-free because a certain error case is mishandled.
How severe is CVE-2018-20856?
CVE-2018-20856 has been rated HIGH with a CVSS base score of 7.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2018-20856?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.