CVE-2022-50239
Full vulnerability record from the local CVENow database.
Description
In the Linux kernel, the following vulnerability has been resolved: cpufreq: qcom: fix writes in read-only memory region This commit fixes a kernel oops because of a write in some read-only memory: [ 9.068287] Unable to handle kernel write to read-only memory at virtual address ffff800009240ad8 ..snip.. [ 9.138790] Internal error: Oops: 9600004f [#1] PREEMPT SMP ..snip.. [ 9.269161] Call trace: [ 9.276271] __memcpy+0x5c/0x230 [ 9.278531] snprintf+0x58/0x80 [ 9.282002] qcom_cpufreq_msm8939_name_version+0xb4/0x190 [ 9.284869] qcom_cpufreq_probe+0xc8/0x39c ..snip.. The following line defines a pointer that point to a char buffer stored in read-only memory: char *pvs_name = "speedXX-pvsXX-vXX"; This pointer is meant to hold a template "speedXX-pvsXX-vXX" where the XX values get overridden by the qcom_cpufreq_krait_name_version function. Since the template is actually stored in read-only memory, when the function executes the following call we get an oops: snprintf(*pvs_name, sizeof("speedXX-pvsXX-vXX"), "speed%d-pvs%d-v%d", speed, pvs, pvs_ver); To fix this issue, we instead store the template name onto the stack by using the following syntax: char pvs_name_buffer[] = "speedXX-pvsXX-vXX"; Because the `pvs_name` needs to be able to be assigned to NULL, the template buffer is stored in the pvs_name_buffer and not under the pvs_name variable.
Severity
HIGH
CVSS score
7.1
(v3.1)
Vulnerability status
Analyzed
Source identifier
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Published
2025-09-15 14:15:34.130000
Last modified
2026-11-05 20:17:28.737000
View original CVE JSON
{
"id": "CVE-2022-50239",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"published": "2025-09-15T14:15:34.130",
"lastModified": "2026-11-05T20:17:28.737",
"vulnStatus": "Analyzed",
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncpufreq: qcom: fix writes in read-only memory region\n\nThis commit fixes a kernel oops because of a write in some read-only memory:\n\n\t[ 9.068287] Unable to handle kernel write to read-only memory at virtual address ffff800009240ad8\n\t..snip..\n\t[ 9.138790] Internal error: Oops: 9600004f [#1] PREEMPT SMP\n\t..snip..\n\t[ 9.269161] Call trace:\n\t[ 9.276271] __memcpy+0x5c/0x230\n\t[ 9.278531] snprintf+0x58/0x80\n\t[ 9.282002] qcom_cpufreq_msm8939_name_version+0xb4/0x190\n\t[ 9.284869] qcom_cpufreq_probe+0xc8/0x39c\n\t..snip..\n\nThe following line defines a pointer that point to a char buffer stored\nin read-only memory:\n\n\tchar *pvs_name = \"speedXX-pvsXX-vXX\";\n\nThis pointer is meant to hold a template \"speedXX-pvsXX-vXX\" where the\nXX values get overridden by the qcom_cpufreq_krait_name_version function. Since\nthe template is actually stored in read-only memory, when the function\nexecutes the following call we get an oops:\n\n\tsnprintf(*pvs_name, sizeof(\"speedXX-pvsXX-vXX\"), \"speed%d-pvs%d-v%d\",\n\t\t speed, pvs, pvs_ver);\n\nTo fix this issue, we instead store the template name onto the stack by\nusing the following syntax:\n\n\tchar pvs_name_buffer[] = \"speedXX-pvsXX-vXX\";\n\nBecause the `pvs_name` needs to be able to be assigned to NULL, the\ntemplate buffer is stored in the pvs_name_buffer and not under the\npvs_name variable."
}
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"programFiles": [
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],
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{
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{
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{
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{
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{
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],
"metrics": {
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"source": "[email protected]",
"type": "Primary",
"cvssData": {
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"baseScore": 7.1,
"baseSeverity": "HIGH",
"attackVector": "LOCAL",
"attackComplexity": "LOW",
"privilegesRequired": "LOW",
"userInteraction": "NONE",
"scope": "UNCHANGED",
"confidentialityImpact": "HIGH",
"integrityImpact": "NONE",
"availabilityImpact": "HIGH"
},
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"impactScore": 5.2
}
],
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"timestamp": "2026-11-05T20:07:35.394692Z",
"id": "CVE-2022-50239",
"options": [
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},
{
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{
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"role": "CISA Coordinator",
"version": "2.0.3"
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}
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},
"weaknesses": [
{
"source": "[email protected]",
"type": "Primary",
"description": [
{
"lang": "en",
"value": "CWE-125"
}
]
}
],
"configurations": [
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