CVE-2025-39698
- Source
- https://cve.org/CVERecord?id=CVE-2025-39698
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-39698.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2025-39698
- Downstream
- Related
- Published
- 2025-09-05T17:21:04Z
- Modified
- 2026-08-12T03:51:32Z
- Severity
-
- 7.8 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
- Summary
- io_uring/futex: ensure io_futex_wait() cleans up properly on failure
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
io_uring/futex: ensure io_futex_wait() cleans up properly on failure
The io_futex_data is allocated upfront and assigned to the io_kiocb async_data field, but the request isn't marked with REQ_F_ASYNC_DATA at that point. Those two should always go together, as the flag tells io_uring whether the field is valid or not.
Additionally, on failure cleanup, the futex handler frees the data but does not clear ->async_data. Clear the data and the flag in the error path as well.
Thanks to Trend Micro Zero Day Initiative and particularly ReDress for reporting this.
- Database specific
{ "cna_assigner": "Linux", "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/39xxx/CVE-2025-39698.json" }- References
-
- https://git.kernel.org/stable/c/508c1314b342b78591f51c4b5dadee31a88335df
- https://git.kernel.org/stable/c/d34c04152df517c59979b4bf2a47f491e06d3256
- https://git.kernel.org/stable/c/d9f93172820a53ab42c4b0e5e65291f4f9d00ad2
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/39xxx/CVE-2025-39698.json
- https://nvd.nist.gov/vuln/detail/CVE-2025-39698
- https://www.zerodayinitiative.com/advisories/ZDI-25-915/
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git