CVE-2021-47258
What it is
In the Linux kernel, the following vulnerability has been resolved: scsi: core: Fix error handling of scsi_host_alloc() After device is initialized via device_initialize(), or its name is set via dev_set_name(), the device has to be freed via put_device(). Otherwise device name will be leaked because it is allocated dynamically in dev_set_name(). Fix the leak by replacing kfree() with put_device(). Since scsi_host_dev_release() properly handles IDA and kthread removal, remove special-casing these from the error handling as well.
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
- Weakness
- CWE-401
- Record status
- Analyzed
Affected
- Linux Kernel < 4.9.273
- Linux Kernel < 4.14.237
- Linux Kernel < 4.19.195
- Linux Kernel < 5.4.126
- Linux Kernel < 5.10.44
- Linux Kernel < 5.12.11
- Linux Kernel 5.13
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-2021-47258.md and follow it. Check whether this project is affected by CVE-2021-47258. 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/2dc85045ae65b9302a1d2e2ddd7ce4c030153a6a
- https://git.kernel.org/stable/c/45d83db4728127944b237c0c8248987df9d478e7
- https://git.kernel.org/stable/c/66a834d092930cf41d809c0e989b13cd6f9ca006
- https://git.kernel.org/stable/c/79296e292d67fa7b5fb8d8c27343683e823872c8
- https://git.kernel.org/stable/c/7a696ce1d5d16a33a6cd6400bbcc0339b2460e11
- https://git.kernel.org/stable/c/8958181c1663e24a13434448e7d6b96b5d04900a
- https://git.kernel.org/stable/c/db08ce595dd64ea9859f7d088b51cbfc8e685c66
- https://git.kernel.org/stable/c/2dc85045ae65b9302a1d2e2ddd7ce4c030153a6a
- https://git.kernel.org/stable/c/45d83db4728127944b237c0c8248987df9d478e7
- https://git.kernel.org/stable/c/66a834d092930cf41d809c0e989b13cd6f9ca006
References
- https://git.kernel.org/stable/c/2dc85045ae65b9302a1d2e2ddd7ce4c030153a6a
- https://git.kernel.org/stable/c/45d83db4728127944b237c0c8248987df9d478e7
- https://git.kernel.org/stable/c/66a834d092930cf41d809c0e989b13cd6f9ca006
- https://git.kernel.org/stable/c/79296e292d67fa7b5fb8d8c27343683e823872c8
- https://git.kernel.org/stable/c/7a696ce1d5d16a33a6cd6400bbcc0339b2460e11
- https://git.kernel.org/stable/c/8958181c1663e24a13434448e7d6b96b5d04900a
- https://git.kernel.org/stable/c/db08ce595dd64ea9859f7d088b51cbfc8e685c66
- https://git.kernel.org/stable/c/2dc85045ae65b9302a1d2e2ddd7ce4c030153a6a
- https://git.kernel.org/stable/c/45d83db4728127944b237c0c8248987df9d478e7
- https://git.kernel.org/stable/c/66a834d092930cf41d809c0e989b13cd6f9ca006
- https://git.kernel.org/stable/c/79296e292d67fa7b5fb8d8c27343683e823872c8
- https://git.kernel.org/stable/c/7a696ce1d5d16a33a6cd6400bbcc0339b2460e11
- https://git.kernel.org/stable/c/8958181c1663e24a13434448e7d6b96b5d04900a
- https://git.kernel.org/stable/c/db08ce595dd64ea9859f7d088b51cbfc8e685c66