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CVE-2025-38567nfsd: avoid ref leak in nfsd_open_local_fh()

Description

In the Linux kernel, the following vulnerability has been resolved: nfsd: avoid ref leak in nfsd_open_local_fh() If two calls to nfsd_open_local_fh() race and both successfully call nfsd_file_acquire_local(), they will both get an extra reference to the net to accompany the file reference stored in *pnf. One of them will fail to store (using xchg()) the file reference in *pnf and will drop that reference but WON'T drop the accompanying reference to the net. This leak means that when the nfs server is shut down it will hang in nfsd_shutdown_net() waiting for &nn->nfsd_net_free_done. This patch adds the missing nfsd_net_put().

Timeline

  1. ID reserved

    By Linux

  2. · 4 months later

    Published

  3. · 9 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-2025-38567, by who scored it
Scored byCVSSScoreVector
NVDNVD · Analyzed3.1Medium4.7CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
EPSS (exploitation in 30 days)
0.12% · top 98% of all CVEs (14 Nov 2026)
Loading the EPSS history…

The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 4.7.

Affected products

  • Linux · Linux

    • affected 986a21ace186433e0397a59491646edad8c8d636 – < fcb0a417fddb605530c4837e0996620f8ed38023
    • affected e6f7e1487ab528a6c653bd0d42812ff2942846cd – < c4bf8f26c51e51bbb840935659a7b3b65a802c07
    • affected e6f7e1487ab528a6c653bd0d42812ff2942846cd – < e5a73150776f18547ee685c9f6bfafe549714899
    • affected 6.15.3 – < 6.15.10

  • Linux · Linux

    • affected 6.16
    • unaffected < 6.16
    • unaffected 6.15.10 – ≤ 6.15.*
    • unaffected 6.16.1 – ≤ 6.16.*
    • unaffected 6.17 – ≤ *

References

References3

Sources

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

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Record last updated .