CVE-2024-36479: fpga: bridge: add owner module and take its refcount
First published: Mon Jun 24 2024(Updated: )
In the Linux kernel, the following vulnerability has been resolved: fpga: bridge: add owner module and take its refcount The current implementation of the fpga bridge assumes that the low-level module registers a driver for the parent device and uses its owner pointer to take the module's refcount. This approach is problematic since it can lead to a null pointer dereference while attempting to get the bridge if the parent device does not have a driver. To address this problem, add a module owner pointer to the fpga_bridge struct and use it to take the module's refcount. Modify the function for registering a bridge to take an additional owner module parameter and rename it to avoid conflicts. Use the old function name for a helper macro that automatically sets the module that registers the bridge as the owner. This ensures compatibility with existing low-level control modules and reduces the chances of registering a bridge without setting the owner. Also, update the documentation to keep it consistent with the new interface for registering an fpga bridge. Other changes: opportunistically move put_device() from __fpga_bridge_get() to fpga_bridge_get() and of_fpga_bridge_get() to improve code clarity since the bridge device is taken in these functions.
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| debian/linux | <=5.10.223-1<=5.10.226-1<=6.1.115-1<=6.1.119-1 | 6.11.10-1 6.12.5-1 |
Never miss a vulnerability like this again
Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.
Reference Links
- https://git.kernel.org/stable/c/1da11f822042eb6ef4b6064dc048f157a7852529
- https://git.kernel.org/stable/c/6896b6b2e2d9ec4e1b0acb4c1698a75a4b34d125
- https://git.kernel.org/stable/c/d7c4081c54a1d4068de9440957303a76f9e5c95b
- https://launchpad.net/bugs/cve/CVE-2024-36479
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-36479
- https://nvd.nist.gov/vuln/detail/CVE-2024-36479
- https://security-tracker.debian.org/tracker/CVE-2024-36479
- https://ubuntu.com/security/CVE-2024-36479
- https://git.kernel.org/linus/1da11f822042eb6ef4b6064dc048f157a7852529
- https://git.kernel.org/stable/c/18dc8366abb6cadcb77668b1a16434654e355d49
- agent/weakness
- agent/severity
- agent/title
- agent/type
- collector/launchpad-cve
- source/Launchpad
- agent/author
- agent/remedy
- agent/first-publish-date
- collector/usn-cve
- source/Ubuntu
- agent/description
- agent/event
- collector/nvd-cve
- source/NVD
- collector/mitre-cve
- source/MITRE
- agent/references
- agent/tags
- collector/nvd-api
- agent/last-modified-date
- collector/security-tracker-debian
- source/Debian
- agent/software-canonical-lookup
- agent/softwarecombine
- agent/trending
- package-manager/debian