CVE-2023-54043
In the Linux kernel, the following vulnerability has been resolved: iommufd: Do not add the same hwpt to the ioas->hwpt_list twice The hwpt is added to the hwpt_list only during its creation, it is never added again. This hunk is some missed leftover from rework. Adding it twice will corrupt the linked list in some cases. It effects HWPT specific attachment, which is something the test suite cannot cover until we can create a legitimate struct device with a non-system iommu "driver" (ie we need the bus removed from the iommu code)
Affected versions
Linux kernel versions
6.2
and later are affected. Fixed in
6.2.3,
6.3
and their respective stable series.
References
The following references provide additional information about CVE-2023-54043 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.
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PatchKernel patch commithttps://git.kernel.org/stable/c/b4ff830eca097df51af10a9be29e8cc817327919
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PatchKernel patch commithttps://git.kernel.org/stable/c/c44adefdcf472f946f0632f4e0ddcbf3e00b8516
Frequently asked questions
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What is CVE-2023-54043?
CVE-2023-54043 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 6.2 onward and has been patched in 6.2.3 and 6.3. CVE-2023-54043 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
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Is there a patch available for CVE-2023-54043?
Yes — CVE-2023-54043 has been patched. Fixed versions include 6.2.3 and 6.3. If you are running Linux kernel 6.2 or later up to the fix versions, apply the relevant patch for your kernel branch.
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Is CVE-2023-54043 actively exploited?
No — CVE-2023-54043 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.