CVE-2022-49894

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

CVSS v3 5.5 MEDIUM

5.5^/10

CVSS v3 : MEDIUM

V3 Legend

Vector :

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://git.kernel.org/stable/c/12316b9f7c18138ae656050cfd716728e27b7e2f	Patch
https://git.kernel.org/stable/c/a90accb358ae33ea982a35595573f7a045993f8b	Patch

Configurations

Configuration 1 (hide)

OR	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel:6.1:rc1::::::
	cpe:2.3:o:linux:linux_kernel:6.1:rc2::::::
	cpe:2.3:o:linux:linux_kernel:6.1:rc3::::::

History

07 May 2025, 13:19

Type	Values Removed	Values Added
References	~~() https://git.kernel.org/stable/c/12316b9f7c18138ae656050cfd716728e27b7e2f -~~	() https://git.kernel.org/stable/c/12316b9f7c18138ae656050cfd716728e27b7e2f - Patch
References	~~() https://git.kernel.org/stable/c/a90accb358ae33ea982a35595573f7a045993f8b -~~	() https://git.kernel.org/stable/c/a90accb358ae33ea982a35595573f7a045993f8b - Patch
CPE		cpe:2.3:o:linux:linux_kernel:::::::: cpe:2.3:o:linux:linux_kernel:6.1:rc1:::::: cpe:2.3:o:linux:linux_kernel:6.1:rc2:::::: cpe:2.3:o:linux:linux_kernel:6.1:rc3::::::
First Time		Linux linux Kernel Linux
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 5.5
CWE		CWE-476

02 May 2025, 13:52

Type	Values Removed	Values Added
Summary		(es) En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: cxl/region: Corregir la validación del ordenamiento HPA de la región. Algunas regiones pueden no tener ningún espacio de direcciones asignado. Omítalos al validar el orden de HPA; de lo contrario, puede producirse un fallo como el siguiente: devm_cxl_add_region: cxl_acpi cxl_acpi.0: decoder3.4: created region9 BUG: desreferencia de puntero NULL del kernel, dirección: 0000000000000000 [..] RIP: 0010:store_targetN+0x655/0x1740 [cxl_core] [..] Seguimiento de llamadas: 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 (integrado por) cxl_port_attach_region en drivers/cxl/core/region.c:850 (integrado por) cxl_region_attach en drivers/cxl/core/region.c:1290 (integrado por) attached_target en drivers/cxl/core/region.c:1410 (integrado por) store_targetN en drivers/cxl/core/region.c:1453

01 May 2025, 15:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2025-05-01 15:16

Updated : 2025-05-07 13:19

NVD link : CVE-2022-49894

Mitre link : CVE-2022-49894

CVE.ORG link : CVE-2022-49894

JSON object : View

Products Affected

linux

linux_kernel

CWE

CWE-476

NULL Pointer Dereference

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5.5 /10