Vulnerability Details CVE-2023-52895
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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.0
EPSS Ranking 13.7%
CVSS Severity
CVSS v3 Score 5.5
References
Products affected by CVE-2023-52895
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cpe:2.3:o:linux:linux_kernel:6.1.7