Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: IB/hfi1: Fix leak of rcvhdrtail_dummy_kvaddr This buffer is currently allocated in hfi1_init(): if (reinit) ret = init_after_reset(dd); else ret = loadtime_init(dd); if (ret) goto done; /* allocate dummy tail memory for all receive contexts */ dd->rcvhdrtail_dummy_kvaddr = dma_alloc_coherent(&dd->pcidev->dev, sizeof(u64), &dd->rcvhdrtail_dummy_dma, GFP_KERNEL); if (!dd->rcvhdrtail_dummy_kvaddr) { dd_dev_err(dd, "cannot allocate dummy tail memory\n"); ret = -ENOMEM; goto done; } The reinit triggered path will overwrite the old allocation and leak it. Fix by moving the allocation to hfi1_alloc_devdata() and the deallocation to hfi1_free_devdata().
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 4.5, < 5.10.85 |
Related Weaknesses (CWE)
References
- https://git.kernel.org/stable/c/2c08271f4ed0e24633b3f81ceff61052b9d45efcPatch
- https://git.kernel.org/stable/c/60a8b5a1611b4a26de4839ab9c1fc2a9cf3e17c1Patch
- https://git.kernel.org/stable/c/834d0fb978643eaf09da425de197cc16a7c2761bPatch
- https://git.kernel.org/stable/c/2c08271f4ed0e24633b3f81ceff61052b9d45efcPatch
- https://git.kernel.org/stable/c/60a8b5a1611b4a26de4839ab9c1fc2a9cf3e17c1Patch
- https://git.kernel.org/stable/c/834d0fb978643eaf09da425de197cc16a7c2761bPatch
FAQ
What is CVE-2021-47523?
CVE-2021-47523 is a vulnerability with a CVSS score of 5.5 (MEDIUM). In the Linux kernel, the following vulnerability has been resolved: IB/hfi1: Fix leak of rcvhdrtail_dummy_kvaddr This buffer is currently allocated in hfi1_init(): if (reinit) ret = init_after_r...
How severe is CVE-2021-47523?
CVE-2021-47523 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-2021-47523?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.