Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: regmap: set debugfs_name to NULL after it is freed There is a upstream commit cffa4b2122f5("regmap:debugfs: Fix a memory leak when calling regmap_attach_dev") that adds a if condition when create name for debugfs_name. With below function invoking logical, debugfs_name is freed in regmap_debugfs_exit(), but it is not created again because of the if condition introduced by above commit. regmap_reinit_cache() regmap_debugfs_exit() ... regmap_debugfs_init() So, set debugfs_name to NULL after it is freed.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 4.19.168, < 4.19.191 |
Related Weaknesses (CWE)
References
- https://git.kernel.org/stable/c/2dc1554d5f0fdaf47cc5bea442b84b9226fea867Patch
- https://git.kernel.org/stable/c/b9e569ae1da3a113b3acee8703c94777fd20938aPatch
- https://git.kernel.org/stable/c/c764e375ae647832de1ee73d43a4bb3ef8a8f43dPatch
- https://git.kernel.org/stable/c/d8897f7b2283a500666c85ef06e820df38ed7b52Patch
- https://git.kernel.org/stable/c/e41a962f82e7afb5b1ee644f48ad0b3aee656268Patch
- https://git.kernel.org/stable/c/eb949f891226c012138ffd9df90d1e509f428ae6Patch
- https://git.kernel.org/stable/c/2dc1554d5f0fdaf47cc5bea442b84b9226fea867Patch
- https://git.kernel.org/stable/c/b9e569ae1da3a113b3acee8703c94777fd20938aPatch
- https://git.kernel.org/stable/c/c764e375ae647832de1ee73d43a4bb3ef8a8f43dPatch
- https://git.kernel.org/stable/c/d8897f7b2283a500666c85ef06e820df38ed7b52Patch
- https://git.kernel.org/stable/c/e41a962f82e7afb5b1ee644f48ad0b3aee656268Patch
- https://git.kernel.org/stable/c/eb949f891226c012138ffd9df90d1e509f428ae6Patch
FAQ
What is CVE-2021-47058?
CVE-2021-47058 is a vulnerability with a CVSS score of 7.8 (HIGH). In the Linux kernel, the following vulnerability has been resolved: regmap: set debugfs_name to NULL after it is freed There is a upstream commit cffa4b2122f5("regmap:debugfs: Fix a memory leak when...
How severe is CVE-2021-47058?
CVE-2021-47058 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-2021-47058?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.