cbcvebase.
CVE-2024-57934
published 2025-01-21

CVE-2024-57934: In the Linux kernel, the following vulnerability has been resolved: fgraph: Add READ_ONCE() when accessing fgraph_array[] In __ftrace_return_to_handler(), a…

PriorityP415medium4.7CVSS 3.1
AVLACHPRLUINSUCNINAH
EPSS
0.17%
6.2th percentile
In the Linux kernel, the following vulnerability has been resolved: fgraph: Add READ_ONCE() when accessing fgraph_array[] In __ftrace_return_to_handler(), a loop iterates over the fgraph_array[] elements, which are fgraph_ops. The loop checks if an element is a fgraph_stub to prevent using a fgraph_stub afterward. However, if the compiler reloads fgraph_array[] after this check, it might race with an update to fgraph_array[] that introduces a fgraph_stub. This could result in the stub being processed, but the stub contains a null "func_hash" field, leading to a NULL pointer dereference. To ensure that the gops compared against the fgraph_stub matches the gops processed later, add a READ_ONCE(). A similar patch appears in commit 63a8dfb ("function_graph: Add READ_ONCE() when accessing fgraph_array[]").

Affected

8 ranges
VendorProductVersion rangeFixed in
debianlinux< linux 6.12.9-1 (forky)linux 6.12.9-1 (forky)
linuxlinux
linuxlinux>= 37238abe3cb47b8daaa8706c9949f67b2a705cf1 < b68b2a3fbacc7be720ef589d489bcacdd05c6d38b68b2a3fbacc7be720ef589d489bcacdd05c6d38
linuxlinux>= 37238abe3cb47b8daaa8706c9949f67b2a705cf1 < d65474033740ded0a4fe9a097fce72328655b41dd65474033740ded0a4fe9a097fce72328655b41d
linuxlinux_kernel
linuxlinux_kernel>= 0 < 6.12.9-16.12.9-1
linuxlinux_kernel>= 0 < 6.12.9-16.12.9-1
linuxlinux_kernel>= 6.11 < 6.12.96.12.9

CVSS provenance

nvdv3.14.7MEDIUMCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
osv4.7MEDIUM
vendor_debian4.7LOW
vendor_redhat4.7MEDIUM
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