Medium [CVE-2026-53171] fix arithmetic issues in dma_length
This medium-severity Red Hat Linux advisory covers CVE-2026-53171.
Aggregated and source-linked by VulniPulse. Data sources, validation and limitations.
VulniPulse record published Record updated
Summary
In the Linux kernel, the following vulnerability has been resolved: accel/ethosu: fix arithmetic issues in dma_length() dma_length() derives DMA region usage from command stream values and updates region_size[]: len = ((len + stride[0]) * size0 + stride[1]) * size1 region_size[region] = max(..., len + dma->offset) Several arithmetic issues can corrupt the derived region size: - signed stride values may underflow when added to len - intermediate multiplications may overflow - len + dma->offset may overflow during region_size updates - dma_length() error returns were not validated by the caller region_size[] is later used by ethosu_job.c to validate command stream accesses against GEM buffer sizes.
Arithmetic wraparound can therefore under-report region usage and bypass the bounds validation. The dma_length() function, responsible for calculating Direct Memory Access (DMA) region usage, contains several arithmetic issues.
These issues, including potential underflows and overflows during calculations, can lead to an under-reporting of memory region sizes. This under-reporting can bypass crucial bounds validation checks, potentially allowing an attacker to access memory outside of its intended boundaries.
Red Hat severity: Moderate. Weakness: CWE-190.
Is CVE-2026-53171 exploited?
No exploitation is reported in the sources VulniPulse tracks: CVE-2026-53171 is not in the CISA KEV catalog (checked ) and this advisory does not report exploitation. That is not proof the vulnerability cannot be exploited.
How do I fix CVE-2026-53171?
The advisory VulniPulse tracks names no fixed release. Follow Red Hat's guidance for workarounds and updates.
Confirm against the vendor advisory before you patch.
Affected versions
No affected-version range was extracted from the source record. The vendor advisory is authoritative. Check it before change work.
Official advisory · medium-confidence parse· fetched 15 days ago·verify at source
Fixed versions
No fixed release is recorded yet. That does not prove no patch exists. Confirm against the vendor advisory.
Official advisory · medium-confidence parse· fetched 15 days ago·verify at source
Mitigation
The source record does not include mitigation steps. That does not mean no fix exists. Read the vendor advisory below for the authoritative guidance.
Official advisory · medium-confidence parse· fetched 15 days ago·verify at source
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