CVE-2022-49894: cxl/region: Fix region HPA ordering validation
First published: Thu May 01 2025(Updated: )
In the Linux kernel, the following vulnerability has been resolved: cxl/region: Fix region HPA ordering validation Some regions may not have any address space allocated. Skip them when validating HPA order otherwise a crash like the following may result: devm_cxl_add_region: cxl_acpi cxl_acpi.0: decoder3.4: created region9 BUG: kernel NULL pointer dereference, address: 0000000000000000 [..] RIP: 0010:store_targetN+0x655/0x1740 [cxl_core] [..] Call Trace: <TASK> kernfs_fop_write_iter+0x144/0x200 vfs_write+0x24a/0x4d0 ksys_write+0x69/0xf0 do_syscall_64+0x3a/0x90 store_targetN+0x655/0x1740: alloc_region_ref at drivers/cxl/core/region.c:676 (inlined by) cxl_port_attach_region at drivers/cxl/core/region.c:850 (inlined by) cxl_region_attach at drivers/cxl/core/region.c:1290 (inlined by) attach_target at drivers/cxl/core/region.c:1410 (inlined by) store_targetN at drivers/cxl/core/region.c:1453
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Kernel |
Never miss a vulnerability like this again
Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.
Reference Links
Frequently Asked Questions
What is the severity of CVE-2022-49894?
CVE-2022-49894 has a severity rating that could lead to system crashes upon validation of certain regions.
How do I fix CVE-2022-49894?
To fix CVE-2022-49894, ensure that your Linux kernel is updated to the version that resolves this vulnerability.
What systems are affected by CVE-2022-49894?
CVE-2022-49894 affects various versions of the Linux kernel, specifically related to the cxl/region component.
What type of vulnerability is CVE-2022-49894?
CVE-2022-49894 is a flaw related to improper validation of HPA ordering in specific regions of the Linux kernel.
Is CVE-2022-49894 being actively exploited?
As of the latest information, there are no reported active exploits specifically targeting CVE-2022-49894.
- collector/mitre-cve
- source/MITRE
- agent/weakness
- agent/title
- agent/references
- agent/description
- agent/first-publish-date
- agent/type
- agent/guess-ai
- agent/software-canonical-lookup
- agent/softwarecombine
- collector/nvd-api
- source/NVD
- agent/last-modified-date
- agent/author
- agent/source
- agent/tags
- agent/event
- vendor/linux
- canonical/linux kernel