# CVE-2022-49320: linux: In the Linux kernel, the following vulnerability has been resolved:  dmaengine: zynqmp_dma: In struct zynqmp_dma_chan...

CVE-2022-49320 is fixed in linux on 1 platform, first by DEBIAN-CVE-2022-49320, released February 26, 2025. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2022-49320
- Priority: Routine
- CVSS: 5.5 (medium)
- EPSS: 0.0027
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Feb 26, 2025

## 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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 12.15 (bookworm) | 5.18.5-1 | [DEBIAN-CVE-2022-49320](https://patchblox.com/security/data/fix/linux/debian-cve-2022-49320.md) | Feb 26, 2025 |
| Linux | linux Debian 13.5 (trixie) | 5.18.5-1 | [DEBIAN-CVE-2022-49320](https://patchblox.com/security/data/fix/linux/debian-cve-2022-49320.md) | Feb 26, 2025 |
| Linux | linux Debian 14 | 5.18.5-1 | [DEBIAN-CVE-2022-49320](https://patchblox.com/security/data/fix/linux/debian-cve-2022-49320.md) | Feb 26, 2025 |

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Data as of 2026-11-08T00:53:09Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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