CVE-2023-52989: firewire: fix memory leak for payload of request subaction to IEC 61883-1 FCP region
First published: Thu Mar 27 2025(Updated: )
In the Linux kernel, the following vulnerability has been resolved: firewire: fix memory leak for payload of request subaction to IEC 61883-1 FCP region This patch is fix for Linux kernel v2.6.33 or later. For request subaction to IEC 61883-1 FCP region, Linux FireWire subsystem have had an issue of use-after-free. The subsystem allows multiple user space listeners to the region, while data of the payload was likely released before the listeners execute read(2) to access to it for copying to user space. The issue was fixed by a commit 281e20323ab7 ("firewire: core: fix use-after-free regression in FCP handler"). The object of payload is duplicated in kernel space for each listener. When the listener executes ioctl(2) with FW_CDEV_IOC_SEND_RESPONSE request, the object is going to be released. However, it causes memory leak since the commit relies on call of release_request() in drivers/firewire/core-cdev.c. Against the expectation, the function is never called due to the design of release_client_resource(). The function delegates release task to caller when called with non-NULL fourth argument. The implementation of ioctl_send_response() is the case. It should release the object explicitly. This commit fixes the bug.
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Kernel | >=2.6.33 | |
| Linux Kernel | >=2.6.33<4.14.306 | |
| Linux Kernel | >=4.15<4.19.273 | |
| Linux Kernel | >=4.20<5.4.232 | |
| Linux Kernel | >=5.5<5.10.168 | |
| Linux Kernel | >=5.11<5.15.93 | |
| Linux Kernel | >=5.16<6.1.11 | |
| Linux Kernel | =6.2-rc1 | |
| Linux Kernel | =6.2-rc2 | |
| Linux Kernel | =6.2-rc3 | |
| Linux Kernel | =6.2-rc4 | |
| Linux Kernel | =6.2-rc5 | |
| Linux Kernel | =6.2-rc6 |
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Reference Links
- https://git.kernel.org/stable/c/b2cd3947d116bb9ba7ff097b5fc747a8956764db
- https://git.kernel.org/stable/c/356ff89acdbe6a66019154bc7eb2d300f5b15103
- https://git.kernel.org/stable/c/53785fd9b315583cf029e39f72b73d23704a2253
- https://git.kernel.org/stable/c/d5a2dcee53fa6e6e2822f93cb3f1b0cd23163bee
- https://git.kernel.org/stable/c/5f4543c9382ae2d5062f6aa4fecae0c9258d0b0e
- https://git.kernel.org/stable/c/c8bdc88216f09cb7387fedbdf613524367328616
- https://git.kernel.org/stable/c/531390a243ef47448f8bad01c186c2787666bf4d
Frequently Asked Questions
What is the severity of CVE-2023-52989?
CVE-2023-52989 has a low severity rating due to its nature of leaking memory in a specific context.
How do I fix CVE-2023-52989?
To fix CVE-2023-52989, you should upgrade to a patched version of the Linux kernel, specifically version 2.6.33 or later.
Which versions of the Linux kernel are affected by CVE-2023-52989?
CVE-2023-52989 affects Linux kernel versions prior to 2.6.33.
What is the nature of the vulnerability described in CVE-2023-52989?
CVE-2023-52989 is a memory leak vulnerability in the FireWire subsystem during request subaction to the IEC 61883-1 FCP region.
Is there a published patch for CVE-2023-52989?
Yes, a patch for CVE-2023-52989 has been published and is included in updates for the Linux kernel.
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