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medium5.5

CVE-2025-21980

In the Linux kernel, the following vulnerability has been resolved: sched: address a potential NULL pointer dereference in the GRED scheduler.

Impact

In the Linux kernel, the following vulnerability has been resolved: sched: address a potential NULL pointer dereference in the GRED scheduler. If kzalloc in gred_init returns a NULL pointer, the code follows the error handling path, invoking gred_destroy. This, in turn, calls gred_offload, where memset could receive a NULL pointer as input, potentially leading to a kernel crash. When table->opt is NULL in gred_init(), gred_change_table_def() is not called yet, so it is not necessary to call ->ndo_setup_tc() in gred_offload().

Affected products

VendorProductAffected versions
LinuxLinux Kernel
from 5.16 before 6.1.132
from 6.2 before 6.6.84
from 6.7 before 6.12.20
from 6.13 before 6.13.8
Version 6.14

Weakness classification

CWE-476

References