# CVE-2021-47374: linux: In the Linux kernel, the following vulnerability has been resolved:  dma-debug: prevent an error message from causing...

CVE-2021-47374 is fixed in linux on 1 platform, first by DEBIAN-CVE-2021-47374, released May 21, 2024. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2021-47374
- Priority: Routine
- CVSS: 5.5 (medium)
- EPSS: 0.0051
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: May 21, 2024

## Description

In the Linux kernel, the following vulnerability has been resolved:  dma-debug: prevent an error message from causing runtime problems  For some drivers, that use the DMA API. This error message can be reached several millions of times per second, causing spam to the kernel's printk buffer and bringing the CPU usage up to 100% (so, it should be rate limited). However, since there is at least one driver that is in the mainline and suffers from the error condition, it is more useful to err_printk() here instead of just rate limiting the error message (in hopes that it will make it easier for other drivers that suffer from this issue to be spotted).

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 12.15 (bookworm) | 5.14.9-1 | [DEBIAN-CVE-2021-47374](https://patchblox.com/security/data/fix/linux/debian-cve-2021-47374.md) | May 21, 2024 |
| Linux | linux Debian 13.5 (trixie) | 5.14.9-1 | [DEBIAN-CVE-2021-47374](https://patchblox.com/security/data/fix/linux/debian-cve-2021-47374.md) | May 21, 2024 |
| Linux | linux Debian 14 | 5.14.9-1 | [DEBIAN-CVE-2021-47374](https://patchblox.com/security/data/fix/linux/debian-cve-2021-47374.md) | May 21, 2024 |

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