Vulnerability Details 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
Exploit prediction scoring system (EPSS) score
EPSS Score 0.0
EPSS Ranking 1.7%
CVSS Severity
CVSS v3 Score 5.5
References
Products affected by CVE-2022-49894
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cpe:2.3:o:linux:linux_kernel:6.0
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cpe:2.3:o:linux:linux_kernel:6.0.1
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cpe:2.3:o:linux:linux_kernel:6.0.2
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cpe:2.3:o:linux:linux_kernel:6.0.3
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cpe:2.3:o:linux:linux_kernel:6.0.4
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cpe:2.3:o:linux:linux_kernel:6.0.5
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cpe:2.3:o:linux:linux_kernel:6.0.6
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cpe:2.3:o:linux:linux_kernel:6.0.7
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cpe:2.3:o:linux:linux_kernel:6.1