Products
Linux kernel
Source
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Tags
CVE-2023-52895 details
Last Modified : Aug. 21, 2024, 12:30 p.m.
Description
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.
CVSS Score
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Weakness
Weakness | Name | Description |
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References
URL | Source |
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https://git.kernel.org/stable/c/36fc7317cdb16cfeae0f879916995037bb615ac4 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
https://git.kernel.org/stable/c/8caa03f10bf92cb8657408a6ece6a8a73f96ce13 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 |