Bug 2516798 (CVE-2026-74380)

Summary: CVE-2026-74380 kernel: gpu: host1x: Fix iommu_map_sgtable() return value check
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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Priority: low    
Version: unspecifiedCC: rhel-process-autobot, watson-tool-maintainers
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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Doc Text:
A flaw was found in the Linux kernel's host1x GPU driver. An incorrect return value check in the `iommu_map_sgtable()` function, coupled with an improper integer assignment in `pin_job()`, could lead to negative value overflows. This vulnerability may result in data integrity issues or system instability within the GPU memory management subsystem.
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Description OSIDB Bzimport 2026-08-15 06:34:02 UTC 
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.
Comment 1 gkamathe 2026-08-19 09:25:10 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026081505-CVE-2026-74380-1dbd@gregkh/T