VMware Photon OS: CVE-2021-47523

VMware Photon OS: CVE-2021-47523

Severity

4

CVSS

(AV:L/AC:M/Au:N/C:P/I:P/A:P)

Published

05/24/2024

Created

01/21/2025

Added

01/20/2025

Modified

01/20/2025

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().

Solution(s)

• vmware-photon_os_update_tdnf

References

• https://attackerkb.com/topics/cve-2021-47523
• CVE - 2021-47523