CVE-2022-49320
dmaengine: zynqmp_dma: In struct zynqmp_dma_chan fix desc_size data type
- Published
- Updated
- Reserved
- Assigned by
- Linux
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.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Analyzed | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.27% · top 81% of all CVEs (6 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.5.
Weakness
Affected products
- affected b0cc417c1637192be658e68a74c8d1568e3d35f6 – < 83960276ffc9bf5570d4106490346b61e61be5f3
- affected b0cc417c1637192be658e68a74c8d1568e3d35f6 – < 95a0ba85c1b51b36e909841c02d205cd223ab753
- affected b0cc417c1637192be658e68a74c8d1568e3d35f6 – < 7b5488f4721fed6e121e661e165bab06ae2f8675
- affected b0cc417c1637192be658e68a74c8d1568e3d35f6 – < 4838969e4d95d2bd2995d1605b20d3144fcb3e74
- affected b0cc417c1637192be658e68a74c8d1568e3d35f6 – < 90aefae2e3a770a6909d339f5d8a988c0b0ceaf0
- affected b0cc417c1637192be658e68a74c8d1568e3d35f6 – < f9a9f43a62a04ec3183fb0da9226c7706eed0115
- affected 4.8
- unaffected < 4.8
- unaffected 5.4.198 – ≤ 5.4.*
- unaffected 5.10.122 – ≤ 5.10.*
- unaffected 5.15.47 – ≤ 5.15.*
- unaffected 5.17.15 – ≤ 5.17.*
- unaffected 5.18.4 – ≤ 5.18.*
- unaffected 5.19 – ≤ *
References (6)
- https://git.kernel.org/stable/c/83960276ffc9bf5570d4106490346b61e61be5f3 (opens in a new tab)
- https://git.kernel.org/stable/c/95a0ba85c1b51b36e909841c02d205cd223ab753 (opens in a new tab)
- https://git.kernel.org/stable/c/7b5488f4721fed6e121e661e165bab06ae2f8675 (opens in a new tab)
- https://git.kernel.org/stable/c/4838969e4d95d2bd2995d1605b20d3144fcb3e74 (opens in a new tab)
- https://git.kernel.org/stable/c/90aefae2e3a770a6909d339f5d8a988c0b0ceaf0 (opens in a new tab)
- https://git.kernel.org/stable/c/f9a9f43a62a04ec3183fb0da9226c7706eed0115 (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
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[](https://trackcve.app/cve/CVE-2022-49320)Record last updated .