CVE-2021-47480
What it is
In the Linux kernel, the following vulnerability has been resolved: scsi: core: Put LLD module refcnt after SCSI device is released SCSI host release is triggered when SCSI device is freed. We have to make sure that the low-level device driver module won't be unloaded before SCSI host instance is released because shost->hostt is required in the release handler. Make sure to put LLD module refcnt after SCSI device is released. Fixes a kernel panic of 'BUG: unable to handle page fault for address' reported by Changhui and Yi.
At a glance
- Exploitability
- Can be exploited locally on the machine with a low-privilege account. High risk of service disruption.
- Exploit odds
- 0.2% chance of exploitation in the next 30 days (EPSS).
- Fix
- A patch, advisory or fixed version is referenced. Upgrade or apply it.
Timeline
- PublishedDisclosed publicly on CVE.org and NVD
- Last updatedMost recent change to the record
Why it ranks here
- Exploited in the wild: no, CISA does not list it.
- Exploit odds: 0.2% in the next 30 days (EPSS).
- Severity: 5.5 MEDIUM (CVSS).
- Fix: a patch or advisory is linked.
Details
- Published
- Last modified
- Exploit probability
- 0.2% · EPSS, next 30 days
- Record status
- Analyzed
Affected
- Linux Kernel < 4.4.292
- Linux Kernel < 4.9.290
- Linux Kernel < 4.14.255
- Linux Kernel < 4.19.216
- Linux Kernel < 5.4.158
- Linux Kernel < 5.10.78
- Linux Kernel < 5.14.17
- Linux Kernel 5.15
Attack profile CVSS 3.1 · 5.5
- Attack vector
- Local
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- None
- Availability
- High
Raw vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Is it in your code?
Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.
Read https://cve-list.com/agent/cve/CVE-2021-47480.md and follow it. Check whether this project is affected by CVE-2021-47480. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.
Fix and advisories
- https://git.kernel.org/stable/c/1105573d964f7b78734348466b01f5f6ba8a1813
- https://git.kernel.org/stable/c/1ce287eff9f23181d5644db787f472463a61f68b
- https://git.kernel.org/stable/c/61a0faa89f21861d1f8d059123b5c285a5d9ffee
- https://git.kernel.org/stable/c/7b57c38d12aed1b5d92f74748bed25e0d041729f
- https://git.kernel.org/stable/c/8e4814a461787e15a31d322d9efbe0d4f6822428
- https://git.kernel.org/stable/c/c2df161f69fb1c67f63adbd193368b47f511edc0
- https://git.kernel.org/stable/c/f2b85040acec9a928b4eb1b57a989324e8e38d3f
- https://git.kernel.org/stable/c/f30822c0b4c35ec86187ab055263943dc71a6836
- https://git.kernel.org/stable/c/1105573d964f7b78734348466b01f5f6ba8a1813
- https://git.kernel.org/stable/c/1ce287eff9f23181d5644db787f472463a61f68b
References
- https://git.kernel.org/stable/c/1105573d964f7b78734348466b01f5f6ba8a1813
- https://git.kernel.org/stable/c/1ce287eff9f23181d5644db787f472463a61f68b
- https://git.kernel.org/stable/c/61a0faa89f21861d1f8d059123b5c285a5d9ffee
- https://git.kernel.org/stable/c/7b57c38d12aed1b5d92f74748bed25e0d041729f
- https://git.kernel.org/stable/c/8e4814a461787e15a31d322d9efbe0d4f6822428
- https://git.kernel.org/stable/c/c2df161f69fb1c67f63adbd193368b47f511edc0
- https://git.kernel.org/stable/c/f2b85040acec9a928b4eb1b57a989324e8e38d3f
- https://git.kernel.org/stable/c/f30822c0b4c35ec86187ab055263943dc71a6836
- https://git.kernel.org/stable/c/1105573d964f7b78734348466b01f5f6ba8a1813
- https://git.kernel.org/stable/c/1ce287eff9f23181d5644db787f472463a61f68b
- https://git.kernel.org/stable/c/61a0faa89f21861d1f8d059123b5c285a5d9ffee
- https://git.kernel.org/stable/c/7b57c38d12aed1b5d92f74748bed25e0d041729f
- https://git.kernel.org/stable/c/8e4814a461787e15a31d322d9efbe0d4f6822428
- https://git.kernel.org/stable/c/c2df161f69fb1c67f63adbd193368b47f511edc0
- https://git.kernel.org/stable/c/f2b85040acec9a928b4eb1b57a989324e8e38d3f
- https://git.kernel.org/stable/c/f30822c0b4c35ec86187ab055263943dc71a6836