CVE-2023-53848
Unknown Unknown - Not Provided
BaseFortify

Publication date: 2025-12-09

Last updated on: 2025-12-09

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: md/raid5-cache: fix a deadlock in r5l_exit_log() Commit b13015af94cf ("md/raid5-cache: Clear conf->log after finishing work") introduce a new problem: // caller hold reconfig_mutex r5l_exit_log flush_work(&log->disable_writeback_work) r5c_disable_writeback_async wait_event /* * conf->log is not NULL, and mddev_trylock() * will fail, wait_event() can never pass. */ conf->log = NULL Fix this problem by setting 'config->log' to NULL before wake_up() as it used to be, so that wait_event() from r5c_disable_writeback_async() can exist. In the meantime, move forward md_unregister_thread() so that null-ptr-deref this commit fixed can still be fixed.
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Meta Information
Published
2025-12-09
Last Modified
2025-12-09
Generated
2026-05-07
AI Q&A
2025-12-09
EPSS Evaluated
2026-05-05
NVD
CVE-2023-53848
EUVD
EUVD-2023-60148
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
linux linux_kernel *
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-UNKNOWN
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AI Powered Q&A
Can you explain this vulnerability to me?

This vulnerability is a deadlock issue in the Linux kernel's md/raid5-cache component, specifically in the r5l_exit_log() function. A recent commit introduced a problem where a wait_event() call in r5c_disable_writeback_async() can never pass because conf->log is not set to NULL before wake_up() is called. This causes the system to hang waiting indefinitely. The fix involves setting conf->log to NULL before wake_up(), allowing the wait_event() to complete and preventing the deadlock.


How can this vulnerability impact me? :

This vulnerability can cause a deadlock in the Linux kernel's RAID5 cache management, potentially leading to system hangs or unresponsiveness when the affected code path is executed. This can impact system stability and availability, especially on systems using RAID5 caching features.


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