CVE-2022-49334

mm/huge_memory: Fix xarray node memory leak

State: Published
Severity: 5.5 Medium
Published: Feb 26, 2025
Updated: May 11, 2026
Reserved: Feb 26, 2025

Description

In the Linux kernel, the following vulnerability has been resolved:

mm/huge_memory: Fix xarray node memory leak

If xas_split_alloc() fails to allocate the necessary nodes to complete the xarray entry split, it sets the xa_state to -ENOMEM, which xas_nomem() then interprets as "Please allocate more memory", not as "Please free any unnecessary memory" (which was the intended outcome). It's confusing to use xas_nomem() to free memory in this context, so call xas_destroy() instead.

Scores

CVSS	Score	Vector	Source
3.1	5.5 Medium	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H	CISA-ADP

Weaknesses

CWE-401 Missing Release of Memory after Effective Lifetime

Affected Products

Product	Versions
LinuxLinux	6b24ca4a1a8d4ee3221d6d44ddbb99f542e4bda3 to before c0c84962e297927ba57fd6ddc2bb000c9d149655Affected 6b24ca4a1a8d4ee3221d6d44ddbb99f542e4bda3 to before 95c8181b4947e000f3b9b8e5918d899fce77b93dAffected 6b24ca4a1a8d4ee3221d6d44ddbb99f542e4bda3 to before 69a37a8ba1b408a1c7616494aa7018e4b3844cbeAffected
LinuxLinux	5.17Affected before 5.17Not affected 5.17.15 through 5.17.Not affected 5.18.4 through 5.18.Not affected 5.19 and laterNot affected

References

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