CVE-2022-50285
Unknown Unknown - Not Provided
BaseFortify

Publication date: 2025-09-15

Last updated on: 2025-12-04

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: mm,hugetlb: take hugetlb_lock before decrementing h->resv_huge_pages The h->*_huge_pages counters are protected by the hugetlb_lock, but alloc_huge_page has a corner case where it can decrement the counter outside of the lock. This could lead to a corrupted value of h->resv_huge_pages, which we have observed on our systems. Take the hugetlb_lock before decrementing h->resv_huge_pages to avoid a potential race.
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Meta Information
Published
2025-09-15
Last Modified
2025-12-04
Generated
2026-06-16
AI Q&A
2025-09-15
EPSS Evaluated
2026-06-14
NVD
CVE-2022-50285
Affected Vendors & Products
Showing 14 associated CPEs
Vendor Product Version / Range
linux linux_kernel From 4.3.6 (inc) to 4.4 (exc)
linux linux_kernel From 4.4.1 (inc) to 4.9.332 (exc)
linux linux_kernel From 4.10 (inc) to 4.14.298 (exc)
linux linux_kernel From 4.15 (inc) to 4.19.264 (exc)
linux linux_kernel From 4.20 (inc) to 5.4.223 (exc)
linux linux_kernel From 5.5 (inc) to 5.10.153 (exc)
linux linux_kernel From 5.11 (inc) to 5.15.76 (exc)
linux linux_kernel From 5.16 (inc) to 6.0.6 (exc)
linux linux_kernel 4.4
linux linux_kernel 4.4
linux linux_kernel 4.4
linux linux_kernel 4.4
linux linux_kernel 4.4
linux linux_kernel 6.1
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Exploitability
CWE
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CWE ID Description
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Executive Summary

This vulnerability in the Linux kernel involves a race condition related to the handling of huge pages. Specifically, the counters for reserved huge pages (h->resv_huge_pages) are supposed to be protected by a lock called hugetlb_lock. However, there is a corner case in the function alloc_huge_page where the counter can be decremented without holding this lock. This can lead to corrupted values in the counter, potentially causing system instability or incorrect behavior related to huge page management.

Impact Analysis

The impact of this vulnerability is that the corrupted counter for reserved huge pages could lead to incorrect memory management in the Linux kernel. This might cause system instability, crashes, or unexpected behavior in applications relying on huge pages, potentially affecting system performance or reliability.

Mitigation Strategies

Apply the patch or update the Linux kernel to a version where the hugetlb_lock is properly taken before decrementing h->resv_huge_pages to avoid the race condition and potential corruption of the h->resv_huge_pages counter.

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