Riskcovery

CVE-2023-53181

dma-buf/dma-resv: Stop leaking on krealloc() failure

State
Published
Severity
Not scored
Published
Sep 15, 2025
Updated
May 11, 2026
Reserved
Sep 15, 2025

Read the record on cve.org

Description

In the Linux kernel, the following vulnerability has been resolved:

dma-buf/dma-resv: Stop leaking on krealloc() failure

Currently dma_resv_get_fences() will leak the previously allocated array if the fence iteration got restarted and the krealloc_array() fails.

Free the old array by hand, and make sure we still clear the returned *fences so the caller won't end up accessing freed memory. Some (but not all) of the callers of dma_resv_get_fences() seem to still trawl through the array even when dma_resv_get_fences() failed. And let's zero out *num_fences as well for good measure.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

ProductVersions
LinuxLinux
  • d3c80698c9f58a0683badf78793eebaa0c71afbd to before 19e7b9f1f7e1cb92a4cc53b4c064f7fb4b1f1983Affected
  • d3c80698c9f58a0683badf78793eebaa0c71afbd to before 819656cc03dec7f7f7800274dfbc8eb49f888e9fAffected
  • d3c80698c9f58a0683badf78793eebaa0c71afbd to before 05abb3be91d8788328231ee02973ab3d47f5e3d2Affected
LinuxLinux
  • 5.16Affected
  • before 5.16Not affected
  • 6.1.42 through 6.1.*Not affected
  • 6.4.7 through 6.4.*Not affected
  • 6.5 and laterNot affected

References

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