AZL-54117
See a problem?- Import Source
- https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-54117.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/AZL-54117
- Upstream
- Published
- 2024-12-02T14:15:12Z
- Modified
- 2026-04-01T05:16:38.049945Z
- Severity
-
- 5.5 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
- Summary
- CVE-2024-53113 affecting package kernel for versions less than 6.6.64.2-1
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
mm: fix NULL pointer dereference in allocpagesbulk_noprof
We triggered a NULL pointer dereference for ac.preferredzoneref->zone in allocpagesbulknoprof() when the task is migrated between cpusets.
When cpuset is enabled, in prepareallocpages(), ac->nodemask may be ¤t->memsallowed. when firstzoneszonelist() is called to find preferredzoneref, the ac->nodemask may be modified concurrently if the task is migrated between different cpusets. Assuming we have 2 NUMA Node, when traversing Node1 in ac->zonelist, the nodemask is 2, and when traversing Node2 in ac->zonelist, the nodemask is 1. As a result, the ac->preferred_zoneref points to NULL zone.
In allocpagesbulknoprof(), foreachzonezonelistnodemask() finds a allowable zone and calls zonelistnodeidx(ac.preferredzoneref), leading to NULL pointer dereference.
_allocpagesnoprof() fixes this issue by checking NULL pointer in commit ea57485af8f4 ("mm, pagealloc: fix check for NULL preferredzone") and commit df76cee6bbeb ("mm, pagealloc: remove redundant checks from alloc fastpath").
To fix it, check NULL pointer for preferred_zoneref->zone.
- References