CVE-2021-47523 (GCVE-0-2021-47523)

Vulnerability from cvelistv5 – Published: 2024-05-24 15:09 – Updated: 2026-05-11 13:56
VLAI
Title
IB/hfi1: Fix leak of rcvhdrtail_dummy_kvaddr
Summary
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().
Severity
No CVSS data available.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-05-24 19:17 UTC
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 46b010d3eeb8eb29c740c4ef09c666485f5c07e6 , < 2c08271f4ed0e24633b3f81ceff61052b9d45efc (git)
Affected: 46b010d3eeb8eb29c740c4ef09c666485f5c07e6 , < 834d0fb978643eaf09da425de197cc16a7c2761b (git)
Affected: 46b010d3eeb8eb29c740c4ef09c666485f5c07e6 , < 60a8b5a1611b4a26de4839ab9c1fc2a9cf3e17c1 (git)
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Linux Linux Affected: 4.5
Unaffected: 0 , < 4.5 (semver)
Unaffected: 5.10.85 , ≤ 5.10.* (semver)
Unaffected: 5.15.8 , ≤ 5.15.* (semver)
Unaffected: 5.16 , ≤ * (original_commit_for_fix)
Create a notification for this product.
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