CVE - CVE-2025-21676

CVE-ID
CVE-2025-21676	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: net: fec: handle page_pool_dev_alloc_pages error The fec_enet_update_cbd function calls page_pool_dev_alloc_pages but did not handle the case when it returned NULL. There was a WARN_ON(!new_page) but it would still proceed to use the NULL pointer and then crash. This case does seem somewhat rare but when the system is under memory pressure it can happen. One case where I can duplicate this with some frequency is when writing over a smbd share to a SATA HDD attached to an imx6q. Setting /proc/sys/vm/min_free_kbytes to higher values also seems to solve the problem for my test case. But it still seems wrong that the fec driver ignores the memory allocation error and can crash. This commit handles the allocation error by dropping the current packet.
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/001ba0902046cb6c352494df610718c0763e77a5 URL:https://git.kernel.org/stable/c/001ba0902046cb6c352494df610718c0763e77a5 MISC:https://git.kernel.org/stable/c/1425cb829556398f594658512d49292f988a2ab0 URL:https://git.kernel.org/stable/c/1425cb829556398f594658512d49292f988a2ab0 MISC:https://git.kernel.org/stable/c/8a0097db0544b658c159ac787319737712063a23 URL:https://git.kernel.org/stable/c/8a0097db0544b658c159ac787319737712063a23
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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