cve/2018/CVE-2018-20856.md

### [CVE-2018-20856](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-20856)
![](https://img.shields.io/static/v1?label=Product&message=n%2Fa&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=n%2Fa&color=blue)
![](https://img.shields.io/static/v1?label=Vulnerability&message=n%2Fa&color=brighgreen)

### 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.

### POC

#### Reference
- http://packetstormsecurity.com/files/154059/Slackware-Security-Advisory-Slackware-14.2-kernel-Updates.html
- http://packetstormsecurity.com/files/154059/Slackware-Security-Advisory-Slackware-14.2-kernel-Updates.html
- http://packetstormsecurity.com/files/154408/Kernel-Live-Patch-Security-Notice-LSN-0055-1.html
- http://packetstormsecurity.com/files/154408/Kernel-Live-Patch-Security-Notice-LSN-0055-1.html
- http://packetstormsecurity.com/files/154951/Kernel-Live-Patch-Security-Notice-LSN-0058-1.html
- http://packetstormsecurity.com/files/154951/Kernel-Live-Patch-Security-Notice-LSN-0058-1.html
- https://usn.ubuntu.com/4118-1/
- https://usn.ubuntu.com/4118-1/

#### Github
- https://github.com/ARPSyndicate/cvemon
Update Sun May 26 14:27:04 CEST 2024 2024-05-26 14:27:05 +02:00			`### [CVE-2018-20856](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-20856)`
			`![](https://img.shields.io/static/v1?label=Product&message=n%2Fa&color=blue)`
			`![](https://img.shields.io/static/v1?label=Version&message=n%2Fa&color=blue)`
			`![](https://img.shields.io/static/v1?label=Vulnerability&message=n%2Fa&color=brighgreen)`

			`### 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.`

			`### POC`

			`#### Reference`
			`- http://packetstormsecurity.com/files/154059/Slackware-Security-Advisory-Slackware-14.2-kernel-Updates.html`
Update CVE sources 2024-06-09 00:33 2024-06-09 00:33:16 +00:00			`- http://packetstormsecurity.com/files/154059/Slackware-Security-Advisory-Slackware-14.2-kernel-Updates.html`
Update Sun May 26 14:27:04 CEST 2024 2024-05-26 14:27:05 +02:00			`- http://packetstormsecurity.com/files/154408/Kernel-Live-Patch-Security-Notice-LSN-0055-1.html`
Update CVE sources 2024-06-09 00:33 2024-06-09 00:33:16 +00:00			`- http://packetstormsecurity.com/files/154408/Kernel-Live-Patch-Security-Notice-LSN-0055-1.html`
Update Sun May 26 14:27:04 CEST 2024 2024-05-26 14:27:05 +02:00			`- http://packetstormsecurity.com/files/154951/Kernel-Live-Patch-Security-Notice-LSN-0058-1.html`
Update CVE sources 2024-06-09 00:33 2024-06-09 00:33:16 +00:00			`- http://packetstormsecurity.com/files/154951/Kernel-Live-Patch-Security-Notice-LSN-0058-1.html`
Update Sun May 26 14:27:04 CEST 2024 2024-05-26 14:27:05 +02:00			`- https://usn.ubuntu.com/4118-1/`
Update CVE sources 2024-06-09 00:33 2024-06-09 00:33:16 +00:00			`- https://usn.ubuntu.com/4118-1/`
Update Sun May 26 14:27:04 CEST 2024 2024-05-26 14:27:05 +02:00
			`#### Github`
			`- https://github.com/ARPSyndicate/cvemon`