In the Linux kernel, the following vulnerability has been resolved:
binder: fix race between mmput() and do_exit()
Task A calls binder_update_page_range() to allocate and insert pages on
a remote address space from Task B. For this, Task A pins the remote mm
via mmget_not_zero() first. This can race with Task B do_exit() and the
final mmput() refcount decrement will come from Task A.
Task A | Task B
------------------+------------------
mmget_not_zero() |
| do_exit()
| exit_mm()
| mmput()
mmput() |
exit_mmap() |
remove_vma() |
fput() |
In this case, the work of ____fput() from Task B is queued up in Task A
as TWA_RESUME. So in theory, Task A returns to userspace and the cleanup
work gets executed. However, Task A instead sleep, waiting for a reply
from Task B that never comes (it's dead).
This means the binder_deferred_release() is blocked until an unrelated
binder event forces Task A to go back to userspace. All the associated
death notifications will also be delayed until then.
In order to fix this use mmput_async() that will schedule the work in
the corresponding mm->async_put_work WQ instead of Task A.
References
Configurations
Configuration 1 (hide)
|
Configuration 2 (hide)
|
History
10 Mar 2025, 15:10
| Type | Values Removed | Values Added |
|---|---|---|
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 4.7 |
| First Time |
Debian debian Linux
Debian Linux linux Kernel Linux |
|
| CPE | cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
|
| References | () https://git.kernel.org/stable/c/252a2a5569eb9f8d16428872cc24dea1ac0bb097 - Mailing List, Patch | |
| References | () https://git.kernel.org/stable/c/6696f76c32ff67fec26823fc2df46498e70d9bf3 - Mailing List, Patch | |
| References | () https://git.kernel.org/stable/c/67f16bf2cc1698fd50e01ee8a2becc5a8e6d3a3e - Mailing List, Patch | |
| References | () https://git.kernel.org/stable/c/77d210e8db4d61d43b2d16df66b1ec46fad2ee01 - Mailing List, Patch | |
| References | () https://git.kernel.org/stable/c/7e7a0d86542b0ea903006d3f42f33c4f7ead6918 - Mailing List, Patch | |
| References | () https://git.kernel.org/stable/c/95b1d336b0642198b56836b89908d07b9a0c9608 - Mailing List, Patch | |
| References | () https://git.kernel.org/stable/c/98fee5bee97ad47b527a997d5786410430d1f0e9 - Mailing List, Patch | |
| References | () https://git.kernel.org/stable/c/9a9ab0d963621d9d12199df9817e66982582d5a5 - Mailing List, Patch | |
| References | () https://lists.debian.org/debian-lts-announce/2024/06/msg00016.html - Mailing List | |
| References | () https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html - Mailing List | |
| CWE | CWE-362 |
Information
Published : 2024-03-18 11:15
Updated : 2025-03-10 15:10
NVD link : CVE-2023-52609
Mitre link : CVE-2023-52609
CVE.ORG link : CVE-2023-52609
JSON object : View
Products Affected
linux
- linux_kernel
debian
- debian_linux
CWE
CWE-362
Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')