Linux Kernel Vulnerability in Page Pool for Atomic Allocations
CVE-2025-68321
What is CVE-2025-68321?
A vulnerability in the Linux kernel's page allocation mechanism has been identified, specifically affecting the page pool functionality. The issue arises when driver authors neglect to utilize the GFP_NOWARN flag for atomic allocations, leading to unnecessary On Out of Memory (OOM) errors during network operations. This could degrade user experience and system reliability, as network Receive (Rx) actions are likely to encounter page allocation failures under memory constraint scenarios. To mitigate this issue, it is now mandated that the page pool framework apply GFP_NOWARN by default for atomic allocations, helping to reduce the frequency of OOM failures and enhancing overall system stability.
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Affected Version(s)
Linux ff7d6b27f894f1469dc51ccb828b7363ccd9799f < 0ec2cd5c58793d0c622797cd5fbe26634b357210
Linux ff7d6b27f894f1469dc51ccb828b7363ccd9799f < 9835a0fd59a1df5ec0740fdab6d50db68e0f10de
Linux ff7d6b27f894f1469dc51ccb828b7363ccd9799f < 7613c06ffa89c1e2266fb532e23ef7dfdf269d73