CVE-2022-49894
- Source
- https://nvd.nist.gov/vuln/detail/CVE-2022-49894
- Import Source
- https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2022-49894.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/CVE-2022-49894
- Downstream
- Published
- 2025-05-01T14:10:37.109Z
- Modified
- 2025-11-15T00:26:52.368582Z
- 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
- cxl/region: Fix region HPA ordering validation
- Details
-
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:
devmcxladdregion: cxlacpi cxlacpi.0: decoder3.4: created region9 BUG: kernel NULL pointer dereference, address: 0000000000000000 [..] RIP: 0010:storetargetN+0x655/0x1740 [cxlcore] [..] Call Trace: <TASK> kernfsfopwriteiter+0x144/0x200 vfswrite+0x24a/0x4d0 ksyswrite+0x69/0xf0 dosyscall64+0x3a/0x90
storetargetN+0x655/0x1740: allocregionref at drivers/cxl/core/region.c:676 (inlined by) cxlportattachregion at drivers/cxl/core/region.c:850 (inlined by) cxlregionattach at drivers/cxl/core/region.c:1290 (inlined by) attachtarget at drivers/cxl/core/region.c:1410 (inlined by) storetargetN at drivers/cxl/core/region.c:1453
- References
Affected packages
Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Affected ranges
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced384e624bb211b406db40edc900bb51af8bb267d0Fixed12316b9f7c18138ae656050cfd716728e27b7e2f
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced384e624bb211b406db40edc900bb51af8bb267d0Fixeda90accb358ae33ea982a35595573f7a045993f8b
Affected versions
v5.*
v6.*
Database specific
vanir_signatures
[
{
"id": "CVE-2022-49894-192f98f1",
"signature_type": "Line",
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@12316b9f7c18138ae656050cfd716728e27b7e2f",
"digest": {
"threshold": 0.9,
"line_hashes": [
"116096487586774575592447200052644284226",
"294851709607627824392127745382629423184",
"202098278793193884605262936899086929317"
]
},
"signature_version": "v1",
"deprecated": false,
"target": {
"file": "drivers/cxl/core/region.c"
}
},
{
"id": "CVE-2022-49894-34d6dfa2",
"signature_type": "Function",
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@a90accb358ae33ea982a35595573f7a045993f8b",
"digest": {
"function_hash": "224658335636933940160965125101092533301",
"length": 966.0
},
"signature_version": "v1",
"deprecated": false,
"target": {
"file": "drivers/cxl/core/region.c",
"function": "alloc_region_ref"
}
},
{
"id": "CVE-2022-49894-42001ff3",
"signature_type": "Function",
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@12316b9f7c18138ae656050cfd716728e27b7e2f",
"digest": {
"function_hash": "224658335636933940160965125101092533301",
"length": 966.0
},
"signature_version": "v1",
"deprecated": false,
"target": {
"file": "drivers/cxl/core/region.c",
"function": "alloc_region_ref"
}
},
{
"id": "CVE-2022-49894-d0924398",
"signature_type": "Line",
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@a90accb358ae33ea982a35595573f7a045993f8b",
"digest": {
"threshold": 0.9,
"line_hashes": [
"116096487586774575592447200052644284226",
"294851709607627824392127745382629423184",
"202098278793193884605262936899086929317"
]
},
"signature_version": "v1",
"deprecated": false,
"target": {
"file": "drivers/cxl/core/region.c"
}
}
]