CVE-2022-50206

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Source
https://nvd.nist.gov/vuln/detail/CVE-2022-50206
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-50206.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2022-50206
Downstream
Related
Published
2025-06-18T11:15:51Z
Modified
2025-06-18T16:49:10.246918Z
Summary
[none]
Details

In the Linux kernel, the following vulnerability has been resolved:

arm64: fix oops in concurrently setting insn_emulation sysctls

emulationprochandler() changes table->data for procdointvecminmax and can generate the following Oops if called concurrently with itself:

| Unable to handle kernel NULL pointer dereference at virtual address 0000000000000010 | Internal error: Oops: 96000006 [#1] SMP | Call trace: | updateinsnemulationmode+0xc0/0x148 | emulationprochandler+0x64/0xb8 | procsyscallhandler+0x9c/0xf8 | procsyswrite+0x18/0x20 | _vfswrite+0x20/0x48 | vfswrite+0xe4/0x1d0 | ksyswrite+0x70/0xf8 | _arm64syswrite+0x20/0x28 | el0svccommon.constprop.0+0x7c/0x1c0 | el0svchandler+0x2c/0xa0 | el0svc+0x8/0x200

To fix this issue, keep the table->data as &insn->currentmode and use containerof() to retrieve the insn pointer. Another mutex is used to protect against the currentmode update but not for retrieving insnemulation as table->data is no longer changing.

References

Affected packages

Debian:11 / linux

Package

Name
linux
Purl
pkg:deb/debian/linux?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
5.10.140-1

Affected versions

5.*

5.10.46-4
5.10.46-5
5.10.70-1~bpo10+1
5.10.70-1
5.10.84-1
5.10.92-1~bpo10+1
5.10.92-1
5.10.92-2
5.10.103-1~bpo10+1
5.10.103-1
5.10.106-1
5.10.113-1
5.10.120-1~bpo10+1
5.10.120-1
5.10.127-1
5.10.127-2~bpo10+1
5.10.127-2
5.10.136-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Debian:12 / linux

Package

Name
linux
Purl
pkg:deb/debian/linux?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
6.0.2-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Debian:13 / linux

Package

Name
linux
Purl
pkg:deb/debian/linux?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
6.0.2-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}