# CVE-2022-49569: linux: In the Linux kernel, the following vulnerability has been resolved:  spi: bcm2835: bcm2835_spi_handle_err(): fix NULL...

CVE-2022-49569 is fixed in linux on 1 platform, first by DEBIAN-CVE-2022-49569, released February 26, 2025. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2022-49569
- Priority: Routine
- CVSS: 5.5 (medium)
- EPSS: 0.0026
- 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:  spi: bcm2835: bcm2835_spi_handle_err(): fix NULL pointer deref for non DMA transfers  In case a IRQ based transfer times out the bcm2835_spi_handle_err() function is called. Since commit 1513ceee70f2 ("spi: bcm2835: Drop dma_pending flag") the TX and RX DMA transfers are unconditionally canceled, leading to NULL pointer derefs if ctlr->dma_tx or ctlr->dma_rx are not set.  Fix the NULL pointer deref by checking that ctlr->dma_tx and ctlr->dma_rx are valid pointers before accessing them.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 12.15 (bookworm) | 5.18.16-1 | [DEBIAN-CVE-2022-49569](https://patchblox.com/security/data/fix/linux/debian-cve-2022-49569.md) | Feb 26, 2025 |
| Linux | linux Debian 13.5 (trixie) | 5.18.16-1 | [DEBIAN-CVE-2022-49569](https://patchblox.com/security/data/fix/linux/debian-cve-2022-49569.md) | Feb 26, 2025 |
| Linux | linux Debian 14 | 5.18.16-1 | [DEBIAN-CVE-2022-49569](https://patchblox.com/security/data/fix/linux/debian-cve-2022-49569.md) | Feb 26, 2025 |

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Data as of 2026-11-08T06:59:42Z 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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