CVE-2023-52989 (GCVE-0-2023-52989)
Vulnerability from cvelistv5
Published
2025-03-27 16:43
Modified
2025-10-01 20:17
Severity ?
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Summary
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.
References
Impacted products
Vendor Product Version
Linux Linux Version: 281e20323ab72180137824a298ee9e21e6f9acf6
Version: 281e20323ab72180137824a298ee9e21e6f9acf6
Version: 281e20323ab72180137824a298ee9e21e6f9acf6
Version: 281e20323ab72180137824a298ee9e21e6f9acf6
Version: 281e20323ab72180137824a298ee9e21e6f9acf6
Version: 281e20323ab72180137824a298ee9e21e6f9acf6
Version: 281e20323ab72180137824a298ee9e21e6f9acf6
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