CVE-2022-50230
- Source
- https://nvd.nist.gov/vuln/detail/CVE-2022-50230
- Import Source
- https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2022-50230.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/CVE-2022-50230
- Downstream
- Published
- 2025-06-18T11:04:06Z
- Modified
- 2025-10-16T06:48:20.099798Z
- Summary
- arm64: set UXN on swapper page tables
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
arm64: set UXN on swapper page tables
[ This issue was fixed upstream by accident in c3cee924bd85 ("arm64: head: cover entire kernel image in initial ID map") as part of a large refactoring of the arm64 boot flow. This simple fix is therefore preferred for -stable backporting ]
On a system that implements FEATEPAN, read/write access to the idmap is denied because UXN is not set on the swapper PTEs. As a result, idmapkptiinstallngmappings panics the kernel when accessing _idmapkptiflag. Fix it by setting UXN on these PTEs.
- 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
-
Introduced18107f8a2df6bf1c6cac8d0713f757f866d5af51Fixed9283e708a9b8529e7aafac9ab5c5c79a9fab8846
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced18107f8a2df6bf1c6cac8d0713f757f866d5af51Fixedc3cee924bd855184d15bc4aa6088dcf8e2c1394c
Affected versions
v5.*
v5.12
v5.12-rc4
v5.12-rc5
v5.12-rc6
v5.12-rc7
v5.12-rc8
v5.13
v5.13-rc1
v5.13-rc2
v5.13-rc3
v5.13-rc4
v5.13-rc5
v5.13-rc6
v5.13-rc7
v5.14
v5.14-rc1
v5.14-rc2
v5.14-rc3
v5.14-rc4
v5.14-rc5
v5.14-rc6
v5.14-rc7
v5.15
v5.15-rc1
v5.15-rc2
v5.15-rc3
v5.15-rc4
v5.15-rc5
v5.15-rc6
v5.15-rc7
v5.16
v5.16-rc1
v5.16-rc2
v5.16-rc3
v5.16-rc4
v5.16-rc5
v5.16-rc6
v5.16-rc7
v5.16-rc8
v5.17
v5.17-rc1
v5.17-rc2
v5.17-rc3
v5.17-rc4
v5.17-rc5
v5.17-rc6
v5.17-rc7
v5.17-rc8
v5.18
v5.18-rc1
v5.18-rc2
v5.18-rc3
v5.18-rc4
v5.18-rc5
v5.18-rc6
v5.18-rc7
v5.19
v5.19-rc1
v5.19-rc2
v5.19-rc3
v5.19-rc4
v5.19-rc5
v5.19-rc6
v5.19-rc7
v5.19-rc8
Database specific
vanir_signatures
[
{
"signature_type": "Function",
"deprecated": false,
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@c3cee924bd855184d15bc4aa6088dcf8e2c1394c",
"signature_version": "v1",
"target": {
"function": "paging_init",
"file": "arch/arm64/mm/mmu.c"
},
"digest": {
"function_hash": "82330200697673335372597973066776512225",
"length": 426.0
},
"id": "CVE-2022-50230-38538c76"
},
{
"signature_type": "Line",
"deprecated": false,
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@c3cee924bd855184d15bc4aa6088dcf8e2c1394c",
"signature_version": "v1",
"target": {
"file": "arch/arm64/mm/mmu.c"
},
"digest": {
"threshold": 0.9,
"line_hashes": [
"34028416160447483806562655426375619884",
"190388467713600494622170557177536062951",
"227617969726944583763367795325012702099",
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"290769937157585924455781113617212255631",
"90484158722437318461048618202179289178",
"18897070344871461206673163287671936908",
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"6793914066014216538223593355057246032",
"171063294696719585450134581695722801252",
"270096704480498375689434467625264803671",
"39384581313273946389704356714930359713",
"232027824551155305080313411277133577849",
"57854298232146873278227890625531748900"
]
},
"id": "CVE-2022-50230-790e998f"
},
{
"signature_type": "Line",
"deprecated": false,
"source": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git@c3cee924bd855184d15bc4aa6088dcf8e2c1394c",
"signature_version": "v1",
"target": {
"file": "arch/arm64/include/asm/kernel-pgtable.h"
},
"digest": {
"threshold": 0.9,
"line_hashes": [
"327892130325109029480489297356604233283",
"71734388821128010166035172852462043457",
"320215778404595278949868419242003230701",
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"324723549656773592822040310492005512954",
"270638501489813482845755054250527356689",
"214970271167890379189281136852339058027",
"327892130325109029480489297356604233283",
"71734388821128010166035172852462043457",
"233557843046479140734566775282309524309",
"319358207898728010128483523687495315903"
]
},
"id": "CVE-2022-50230-e1095a00"
}
]