CVE-2023-53380
Unknown Unknown - Not Provided
BaseFortify

Publication date: 2025-09-18

Last updated on: 2025-12-11

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: md/raid10: fix null-ptr-deref of mreplace in raid10_sync_request There are two check of 'mreplace' in raid10_sync_request(). In the first check, 'need_replace' will be set and 'mreplace' will be used later if no-Faulty 'mreplace' exists, In the second check, 'mreplace' will be set to NULL if it is Faulty, but 'need_replace' will not be changed accordingly. null-ptr-deref occurs if Faulty is set between two check. Fix it by merging two checks into one. And replace 'need_replace' with 'mreplace' because their values are always the same.
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Meta Information
Published
2025-09-18
Last Modified
2025-12-11
Generated
2026-05-27
AI Q&A
2025-09-18
EPSS Evaluated
2026-05-25
NVD
CVE-2023-53380
Affected Vendors & Products
Showing 6 associated CPEs
Vendor Product Version / Range
linux linux_kernel From 4.20 (inc) to 5.4.251 (exc)
linux linux_kernel From 5.5 (inc) to 5.10.188 (exc)
linux linux_kernel From 5.11 (inc) to 5.15.121 (exc)
linux linux_kernel From 5.16 (inc) to 6.1.39 (exc)
linux linux_kernel From 6.2 (inc) to 6.3.13 (exc)
linux linux_kernel From 6.4 (inc) to 6.4.4 (exc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-476 The product dereferences a pointer that it expects to be valid but is NULL.
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AI Powered Q&A
Can you explain this vulnerability to me?

This vulnerability is a null pointer dereference in the Linux kernel's RAID10 synchronization function (raid10_sync_request). It occurs because two separate checks on a variable 'mreplace' are inconsistent: the first sets a flag 'need_replace' and uses 'mreplace' if it is not faulty, while the second sets 'mreplace' to NULL if it is faulty but does not update 'need_replace'. If the 'Faulty' condition changes between these checks, a null pointer dereference can happen. The fix merges the two checks and replaces 'need_replace' with 'mreplace' to ensure consistency.


How can this vulnerability impact me? :

This vulnerability can cause a null pointer dereference in the Linux kernel RAID10 synchronization process, which may lead to a kernel crash or system instability. This can result in denial of service or potential data loss on systems using RAID10 configurations.


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