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CVE-2023-53181

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

Medium5.5EPSS 0.16%
Published
Updated
Reserved
Assigned by
Linux

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.

Timeline

  1. ID reserved

    By Linux

  2. Published

  3. · 8 months later

    Record updated

Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.

Scores

CVSS scores of CVE-2023-53181, by who scored it
Scored byCVSSScoreVector
NVDNVD · Analyzed3.1Medium5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
EPSS (exploitation in 30 days)
0.16% · top 95% of all CVEs (7 Nov 2026)
Loading the EPSS history…

The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.5.

Affected products

  • Linux · Linux

    • affected d3c80698c9f58a0683badf78793eebaa0c71afbd – < 19e7b9f1f7e1cb92a4cc53b4c064f7fb4b1f1983
    • affected d3c80698c9f58a0683badf78793eebaa0c71afbd – < 819656cc03dec7f7f7800274dfbc8eb49f888e9f
    • affected d3c80698c9f58a0683badf78793eebaa0c71afbd – < 05abb3be91d8788328231ee02973ab3d47f5e3d2

  • Linux · Linux

    • affected 5.16
    • unaffected < 5.16
    • unaffected 6.1.42 – ≤ 6.1.*
    • unaffected 6.4.7 – ≤ 6.4.*
    • unaffected 6.5 – ≤ *

References (3)

Sources

The same CVE in the primary databases and aggregators, to check against.

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Record last updated .