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Review reviewHigh

CVE-2025-38730

Linux Linux, linux kernel

In the Linux kernel, the following vulnerability has been resolved: io_uring/net: commit partial buffers on retry Ring provided buffers are potentially only valid within the single execution context in which they were acquired. io_uring deals with this and invalidates them on retry. But on the networking side, if MSG_WAITALL is set, or if the socket is of the streaming type and too little was processed, then it will hang on to the buffer rather than recycle or commit it. This is problematic for two reasons: 1) If someone unregisters the provided buffer ring before a later retry, then the re...

CVSS
7.8
EPSS
0.16%
5.72% percentile
CISA KEV
Not listed
Published
2025.09.05
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability0.16%
Technical severityCVSS 7.8

Vulnerability overview

In the Linux kernel, the following vulnerability has been resolved: io_uring/net: commit partial buffers on retry Ring provided buffers are potentially only valid within the single execution context in which they were acquired. io_uring deals with this and invalidates them on retry. But on the networking side, if MSG_WAITALL is set, or if the socket is of the streaming type and too little was processed, then it will hang on to the buffer rather than recycle or commit it. This is problematic for two reasons: 1) If someone unregisters the provided buffer ring before a later retry, then the re...

Affected product and versions

Product
Linux Linux, linux kernel
Affected versions
>= c56e022c0a27142b7b59ae6bdf45f86bf4b298a1 < 3b53dc1c641f2884d4750fc25aaf6c36b90db606, >= c56e022c0a27142b7b59ae6bdf45f86bf4b298a1 < fe9da1812f8697a38f7e30991d568ec199e16059, >= c56e022c0a27142b7b59ae6bdf45f86bf4b298a1 < 21a4ddb0f5e933f372808c10b9ac704505751bb1, >= c56e022c0a27142b7b59ae6bdf45f86bf4b298a1 < 2eb7937b5fc7fcd90eab7bebb0181214b61b9283, >= c56e022c0a27142b7b59ae6bdf45f86bf4b298a1 < 41b70df5b38bc80967d2e0ed55cc3c3896bba781, >= 6.4, >= 6.4 < 6.6.103, >= 6.7 < 6.12.44, >= 6.13 < 6.15.11, >= 6.16 < 6.16.2, 6.17
Fixed versions
6.6.103, 6.12.44, 6.15.11, 6.16.2

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that Linux Linux, linux kernel and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE
CWE-787
CVE-2025-38730 — Linux Linux, linux kernel | SECUFOCUS NOW