CVE-2025-38730io_uring/net: commit partial buffers on retry
- 7.8HighCVSS base score
- 0.17%Exploitation in 30 daysEPSS · top 93% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
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 req->buf_list will no longer be valid. 2) If multiple sockers are using the same buffer group, then multiple receives can consume the same memory. This can cause data corruption in the application, as either receive could land in the same userspace buffer. Fix this by disallowing partial retries from pinning a provided buffer across multiple executions, if ring provided buffers are used.
Timeline
ID reserved
By Linux
- 5 months later
· 5 months later
Published
- 14 months later
· 14 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
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| LinuxCNA (assigner) | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Modified | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.17% · top 93% of all CVEs (13 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: total
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.
Affected products
- affected c56e022c0a27142b7b59ae6bdf45f86bf4b298a1 – < 3b53dc1c641f2884d4750fc25aaf6c36b90db606
- affected c56e022c0a27142b7b59ae6bdf45f86bf4b298a1 – < fe9da1812f8697a38f7e30991d568ec199e16059
- affected c56e022c0a27142b7b59ae6bdf45f86bf4b298a1 – < 21a4ddb0f5e933f372808c10b9ac704505751bb1
- affected c56e022c0a27142b7b59ae6bdf45f86bf4b298a1 – < 2eb7937b5fc7fcd90eab7bebb0181214b61b9283
- affected c56e022c0a27142b7b59ae6bdf45f86bf4b298a1 – < 41b70df5b38bc80967d2e0ed55cc3c3896bba781
- affected 6.4
- unaffected < 6.4
- unaffected 6.6.103 – ≤ 6.6.*
- unaffected 6.12.44 – ≤ 6.12.*
- unaffected 6.15.11 – ≤ 6.15.*
- unaffected 6.16.2 – ≤ 6.16.*
- unaffected 6.17 – ≤ *
References
References5
- https://git.kernel.org/stable/c/3b53dc1c641f2884d4750fc25aaf6c36b90db606 (opens in a new tab)
- https://git.kernel.org/stable/c/fe9da1812f8697a38f7e30991d568ec199e16059 (opens in a new tab)
- https://git.kernel.org/stable/c/21a4ddb0f5e933f372808c10b9ac704505751bb1 (opens in a new tab)
- https://git.kernel.org/stable/c/2eb7937b5fc7fcd90eab7bebb0181214b61b9283 (opens in a new tab)
- https://git.kernel.org/stable/c/41b70df5b38bc80967d2e0ed55cc3c3896bba781 (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2025-26739 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2025-38730)Record last updated .