CVE-2022-49944
N/A
Summary
In the Linux kernel, the following vulnerability has been resolved:
Revert "usb: typec: ucsi: add a common function ucsi_unregister_connectors()"
The recent commit 87d0e2f41b8c ("usb: typec: ucsi: add a common function ucsi_unregister_connectors()") introduced a regression that caused NULL dereference at reading the power supply sysfs. It's a stale sysfs entry that should have been removed but remains with NULL ops. The commit changed the error handling to skip the entries after a NULL con->wq, and this leaves the power device unreleased.
For addressing the regression, the straight revert is applied here. Further code improvements can be done from the scratch again.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | 87d0e2f41b8cc2018499be4e8003fa8c09b6f2fb < 3d4044c9e6d2e3f11f1f8b5e0ee8647d3eb1afad | affected |
| Linux | Linux | 87d0e2f41b8cc2018499be4e8003fa8c09b6f2fb < 5f73aa2cf8bef4a39baa1591c3144ede4788826e | affected |
| Linux | Linux | 5.19 | affected |
| Linux | Linux | 0 < 5.19 | unaffected |
| Linux | Linux | 5.19.8 <= 5.19.* | unaffected |
| Linux | Linux | 6.0 <= * | unaffected |
Weaknesses
References
- https://git.kernel.org/stable/c/3d4044c9e6d2e3f11f1f8b5e0ee8647d3eb1afad
- https://git.kernel.org/stable/c/5f73aa2cf8bef4a39baa1591c3144ede4788826e
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