CVE-2025-21980

Summary

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 Software

VendorProductVersion RangeStatus
LinuxLinuxf25c0515c521375154c62c72447869f40218c861 < d02c9acd68950a444acda18d514e2b41f846cb7faffected
LinuxLinuxf25c0515c521375154c62c72447869f40218c861 < 0f0a152957d64ce45b4c27c687e7d087e8f45079affected
LinuxLinuxf25c0515c521375154c62c72447869f40218c861 < 68896dd50180b38ea552e49a6a00b685321e5769affected
LinuxLinuxf25c0515c521375154c62c72447869f40218c861 < 5f996b4f80c2cef1f9c77275055e7fcba44c9199affected
LinuxLinuxf25c0515c521375154c62c72447869f40218c861 < 115ef44a98220fddfab37a39a19370497cd718b9affected
LinuxLinux5.16affected
LinuxLinux0 < 5.16unaffected
LinuxLinux6.1.132 <= 6.1.*unaffected
LinuxLinux6.6.84 <= 6.6.*unaffected
LinuxLinux6.12.20 <= 6.12.*unaffected
LinuxLinux6.13.8 <= 6.13.*unaffected
LinuxLinux6.14 <= *unaffected

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: partial

CVE Program Container

Additional References

References