CVE-2021-47502
What it is
In the Linux kernel, the following vulnerability has been resolved: ASoC: codecs: wcd934x: handle channel mappping list correctly Currently each channel is added as list to dai channel list, however there is danger of adding same channel to multiple dai channel list which endups corrupting the other list where its already added. This patch ensures that the channel is actually free before adding to the dai channel list and also ensures that the channel is on the list before deleting it. This check was missing previously, and we did not hit this issue as we were testing very simple usecases with sequence of amixer commands.
At a glance
- Exploitability
- Can be exploited locally on the machine with a low-privilege account. High risk of data exposure, data tampering, 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: 7.8 HIGH (CVSS).
- Fix: a patch or advisory is linked.
Details
- Published
- Last modified
- Exploit probability
- 0.2% · EPSS, next 30 days
- Record status
- Modified
Affected
- Linux Kernel < 5.10.85
- Linux Kernel < 5.15.8
- Linux Kernel 5.16
Attack profile CVSS 3.1 · 7.8
- Attack vector
- Local
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Raw vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/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-2021-47502.md and follow it. Check whether this project is affected by CVE-2021-47502. 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/1089dac26c6b4b833323ae6c0ceab29fb30ede72
- https://git.kernel.org/stable/c/23ba28616d3063bd4c4953598ed5e439ca891101
- https://git.kernel.org/stable/c/339ffb5b56005582aacc860524d2d208604049d1
- https://git.kernel.org/stable/c/1089dac26c6b4b833323ae6c0ceab29fb30ede72
- https://git.kernel.org/stable/c/23ba28616d3063bd4c4953598ed5e439ca891101
- https://git.kernel.org/stable/c/339ffb5b56005582aacc860524d2d208604049d1
References
- https://git.kernel.org/stable/c/1089dac26c6b4b833323ae6c0ceab29fb30ede72
- https://git.kernel.org/stable/c/23ba28616d3063bd4c4953598ed5e439ca891101
- https://git.kernel.org/stable/c/339ffb5b56005582aacc860524d2d208604049d1
- https://git.kernel.org/stable/c/1089dac26c6b4b833323ae6c0ceab29fb30ede72
- https://git.kernel.org/stable/c/23ba28616d3063bd4c4953598ed5e439ca891101
- https://git.kernel.org/stable/c/339ffb5b56005582aacc860524d2d208604049d1