CVE-2023-52895
Linux Kernel io_uring Poll Multipurpose Buffer Leak
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.
INFO
Published Date :
Aug. 21, 2024, 7:15 a.m.
Last Modified :
Sept. 11, 2024, 4:31 p.m.
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Remotely Exploitable :
No
Impact Score :
3.6
Exploitability Score :
1.8
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2023-52895.
| URL | Resource |
|---|---|
| https://git.kernel.org/stable/c/36fc7317cdb16cfeae0f879916995037bb615ac4 | Patch |
| https://git.kernel.org/stable/c/8caa03f10bf92cb8657408a6ece6a8a73f96ce13 | Patch |
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2023-52895 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2023-52895 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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Initial Analysis by [email protected]
Sep. 11, 2024
Action Type Old Value New Value Added CVSS V3.1 NIST AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Changed Reference Type https://git.kernel.org/stable/c/36fc7317cdb16cfeae0f879916995037bb615ac4 No Types Assigned https://git.kernel.org/stable/c/36fc7317cdb16cfeae0f879916995037bb615ac4 Patch Changed Reference Type https://git.kernel.org/stable/c/8caa03f10bf92cb8657408a6ece6a8a73f96ce13 No Types Assigned https://git.kernel.org/stable/c/8caa03f10bf92cb8657408a6ece6a8a73f96ce13 Patch Added CWE NIST CWE-401 Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:6.1.7:*:*:*:*:*:*:* -
CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Aug. 21, 2024
Action Type Old Value New Value Added 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. Added Reference kernel.org https://git.kernel.org/stable/c/36fc7317cdb16cfeae0f879916995037bb615ac4 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/8caa03f10bf92cb8657408a6ece6a8a73f96ce13 [No types assigned]
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2023-52895 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2023-52895
weaknesses.