CVE-2022-50285
mm,hugetlb: take hugetlb_lock before decrementing h->resv_huge_pages
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.
INFO
Published Date :
Sept. 15, 2025, 3:15 p.m.
Last Modified :
Sept. 15, 2025, 3:22 p.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Solution
- Acquire hugetlb_lock before decrementing h->resv_huge_pages.
- Update the Linux kernel to include the fix.
- Verify the integrity of h->resv_huge_pages counters.
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-2022-50285.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2022-50285 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-2022-50285
weaknesses.
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-2022-50285 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2022-50285 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.
-
New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Sep. 15, 2025
Action Type Old Value New Value Added 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. Added Reference https://git.kernel.org/stable/c/112a005d1ded04a4b41b6d01833cc0bda90625cc Added Reference https://git.kernel.org/stable/c/11993652d0b49e27272db0a37aa828d8a3a4b92b Added Reference https://git.kernel.org/stable/c/12df140f0bdfae5dcfc81800970dd7f6f632e00c Added Reference https://git.kernel.org/stable/c/2b35432d324898ec41beb27031d2a1a864a4d40e Added Reference https://git.kernel.org/stable/c/3e50a07b6a5fcd39df1534d3fdaca4292a65efe6 Added Reference https://git.kernel.org/stable/c/568e3812b1778b4c0c229649b59977d88f400ece Added Reference https://git.kernel.org/stable/c/629c986e19fe9481227c7cdfd9a105bbc104d245 Added Reference https://git.kernel.org/stable/c/c828fab903725279aa9dc6ae3d44bb7e4778f92c