CVE-2022-49320 Details
Description
In the Linux kernel, the following vulnerability has been resolved: dmaengine: zynqmp_dma: In struct zynqmp_dma_chan fix desc_size data type In zynqmp_dma_alloc/free_chan_resources functions there is a potential overflow in the below expressions. dma_alloc_coherent(chan->dev, (2 * chan->desc_size * ZYNQMP_DMA_NUM_DESCS), &chan->desc_pool_p, GFP_KERNEL); dma_free_coherent(chan->dev,(2 * ZYNQMP_DMA_DESC_SIZE(chan) * ZYNQMP_DMA_NUM_DESCS), chan->desc_pool_v, chan->desc_pool_p); The arguments desc_size and ZYNQMP_DMA_NUM_DESCS were 32 bit. Though this overflow condition is not observed but it is a potential problem in the case of 32-bit multiplication. Hence fix it by changing the desc_size data type to size_t. In addition to coverity fix it also reuse ZYNQMP_DMA_DESC_SIZE macro in dma_alloc_coherent API argument. Addresses-Coverity: Event overflow_before_widen.
A vulnerability in the Linux kernel's Zynqmp DMA engine has been identified, related to a potential overflow in the handling of descriptor sizes within the DMA channel management functions. The issue arises because the descriptor size and the number of descriptors are treated as 32-bit values, which could lead to an overflow in certain multiplication scenarios, despite the overflow not being currently observed. The vulnerability has been addressed by changing the descriptor size data type to size_t, thereby preventing the potential overflow. Additionally, the fix reuses the ZYNQMP_DMA_DESC_SIZE macro in the argument for the dma_alloc_coherent function, improving consistency and clarity.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
No SSVC data is available for this CVE.
References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://git.kernel.org/stable/c/4838969e4d95d2bd2995d1605b20d3144fcb3e74 | kernel.org | Patch |
| https://git.kernel.org/stable/c/7b5488f4721fed6e121e661e165bab06ae2f8675 | kernel.org | Patch |
| https://git.kernel.org/stable/c/83960276ffc9bf5570d4106490346b61e61be5f3 | kernel.org | Patch |
| https://git.kernel.org/stable/c/90aefae2e3a770a6909d339f5d8a988c0b0ceaf0 | kernel.org | Patch |
| https://git.kernel.org/stable/c/95a0ba85c1b51b36e909841c02d205cd223ab753 | kernel.org | Patch |
| https://git.kernel.org/stable/c/f9a9f43a62a04ec3183fb0da9226c7706eed0115 | kernel.org | Patch |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-190 | Integer Overflow or Wraparound | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| linux linux kernel | >= 4.8, < 5.4.198 >= 5.5, < 5.10.122 >= 5.11, < 5.15.47 >= 5.16, < 5.17.15 >= 5.18, < 5.18.4 |
CPE
Remediation
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Change History
3 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | kernel.org |
| Sep 22, 2025 | Initial Analysis | [email protected] |
| Feb 26, 2025 | New CVE Received | kernel.org |