CVE-2023-53171 Affecting perf package, versions <0:6.1.19-30.43.amzn2023
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published15 Oct 2025
- disclosed15 Sept 2025
Introduced: 15 Sep 2025
CVE-2023-53171 (opens in a new tab)How to fix?
Upgrade Amazon-Linux:2023 perf to version 0:6.1.19-30.43.amzn2023 or higher.
This issue was patched in ALAS2023-2023-138.
NVD Description
Note: Versions mentioned in the description apply only to the upstream perf package and not the perf package as distributed by Amazon-Linux.
See How to fix? for Amazon-Linux:2023 relevant fixed versions and status.
In the Linux kernel, the following vulnerability has been resolved:
vfio/type1: prevent underflow of locked_vm via exec()
When a vfio container is preserved across exec, the task does not change, but it gets a new mm with locked_vm=0, and loses the count from existing dma mappings. If the user later unmaps a dma mapping, locked_vm underflows to a large unsigned value, and a subsequent dma map request fails with ENOMEM in __account_locked_vm.
To avoid underflow, grab and save the mm at the time a dma is mapped. Use that mm when adjusting locked_vm, rather than re-acquiring the saved task's mm, which may have changed. If the saved mm is dead, do nothing.
locked_vm is incremented for existing mappings in a subsequent patch.
References
- http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-53171
- https://git.kernel.org/stable/c/046eca5018f8a5dd1dc2cedf87fb5843b9ea3026
- https://git.kernel.org/stable/c/5a271242716846cc016736fb76be2b40ee49b0c3
- https://git.kernel.org/stable/c/a6b2aabe664098d5cf877ae0fd96459464a30e17
- https://git.kernel.org/stable/c/b0790dff0760b7734cf0961f497ad64628ca550b
- https://git.kernel.org/stable/c/eafb81c50da899dd80b340c841277acc4a1945b7