CVE - CVE-2025-21811

CVE-ID
CVE-2025-21811	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
Description
In the Linux kernel, the following vulnerability has been resolved: nilfs2: protect access to buffers with no active references nilfs_lookup_dirty_data_buffers(), which iterates through the buffers attached to dirty data folios/pages, accesses the attached buffers without locking the folios/pages. For data cache, nilfs_clear_folio_dirty() may be called asynchronously when the file system degenerates to read only, so nilfs_lookup_dirty_data_buffers() still has the potential to cause use after free issues when buffers lose the protection of their dirty state midway due to this asynchronous clearing and are unintentionally freed by try_to_free_buffers(). Eliminate this race issue by adjusting the lock section in this function.
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
MISC:https://git.kernel.org/stable/c/367a9bffabe08c04f6d725032cce3d891b2b9e1a URL:https://git.kernel.org/stable/c/367a9bffabe08c04f6d725032cce3d891b2b9e1a MISC:https://git.kernel.org/stable/c/4b08d23d7d1917bef4fbee8ad81372f49b006656 URL:https://git.kernel.org/stable/c/4b08d23d7d1917bef4fbee8ad81372f49b006656 MISC:https://git.kernel.org/stable/c/58c27fa7a610b6e8d44e6220e7dbddfbaccaf439 URL:https://git.kernel.org/stable/c/58c27fa7a610b6e8d44e6220e7dbddfbaccaf439 MISC:https://git.kernel.org/stable/c/8e1b9201c9a24638cf09c6e1c9f224157328010b URL:https://git.kernel.org/stable/c/8e1b9201c9a24638cf09c6e1c9f224157328010b MISC:https://git.kernel.org/stable/c/c437dfac9f7a5a46ac2a5e6d6acd3059e9f68188 URL:https://git.kernel.org/stable/c/c437dfac9f7a5a46ac2a5e6d6acd3059e9f68188
Assigning CNA
kernel.org
Date Record Created
20241229	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20241229)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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