CVE-2023-52895
- Source
- https://nvd.nist.gov/vuln/detail/CVE-2023-52895
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-52895.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2023-52895
- Downstream
- Published
- 2024-08-21T07:15:06Z
- Modified
- 2025-08-09T19:01:28Z
- Severity
-
- 5.5 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
- Summary
- [none]
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
io_uring/poll: don't reissue in case of poll race on multishot request
A previous commit fixed a poll race that can occur, but it's only applicable for multishot requests. For a multishot request, we can safely ignore a spurious wakeup, as we never leave the waitqueue to begin with.
A blunt reissue of a multishot armed request can cause us to leak a buffer, if they are ring provided. While this seems like a bug in itself, it's not really defined behavior to reissue a multishot request directly. It's less efficient to do so as well, and not required to rearm anything like it is for singleshot poll requests.
- References