Vulnerability Description
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().
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 5.16, < 6.1.132 |
Related Weaknesses (CWE)
References
- https://git.kernel.org/stable/c/0f0a152957d64ce45b4c27c687e7d087e8f45079Patch
- https://git.kernel.org/stable/c/115ef44a98220fddfab37a39a19370497cd718b9Patch
- https://git.kernel.org/stable/c/5f996b4f80c2cef1f9c77275055e7fcba44c9199Patch
- https://git.kernel.org/stable/c/68896dd50180b38ea552e49a6a00b685321e5769Patch
- https://git.kernel.org/stable/c/d02c9acd68950a444acda18d514e2b41f846cb7fPatch
- https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html
FAQ
What is CVE-2025-21980?
CVE-2025-21980 is a vulnerability with a CVSS score of 5.5 (MEDIUM). 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 cod...
How severe is CVE-2025-21980?
CVE-2025-21980 has been rated MEDIUM with a CVSS base score of 5.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2025-21980?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.