CVE-2022-50477
Full vulnerability record from the local CVENow database.
Description
In the Linux kernel, the following vulnerability has been resolved: rtc: class: Fix potential memleak in devm_rtc_allocate_device() devm_rtc_allocate_device() will alloc a rtc_device first, and then run dev_set_name(). If dev_set_name() failed, the rtc_device will memleak. Move devm_add_action_or_reset() in front of dev_set_name() to prevent memleak. unreferenced object 0xffff888110a53000 (size 2048): comm "python3", pid 470, jiffies 4296078308 (age 58.882s) hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 08 30 a5 10 81 88 ff ff .........0...... 08 30 a5 10 81 88 ff ff 00 00 00 00 00 00 00 00 .0.............. backtrace: [<000000004aac0364>] kmalloc_trace+0x21/0x110 [<000000000ff02202>] devm_rtc_allocate_device+0xd4/0x400 [<000000001bdf5639>] devm_rtc_device_register+0x1a/0x80 [<00000000351bf81c>] rx4581_probe+0xdd/0x110 [rtc_rx4581] [<00000000f0eba0ae>] spi_probe+0xde/0x130 [<00000000bff89ee8>] really_probe+0x175/0x3f0 [<00000000128e8d84>] __driver_probe_device+0xe6/0x170 [<00000000ee5bf913>] device_driver_attach+0x32/0x80 [<00000000f3f28f92>] bind_store+0x10b/0x1a0 [<000000009ff812d8>] drv_attr_store+0x49/0x70 [<000000008139c323>] sysfs_kf_write+0x8d/0xb0 [<00000000b6146e01>] kernfs_fop_write_iter+0x214/0x2d0 [<00000000ecbe3895>] vfs_write+0x61a/0x7d0 [<00000000aa2196ea>] ksys_write+0xc8/0x190 [<0000000046a600f5>] do_syscall_64+0x37/0x90 [<00000000541a336f>] entry_SYSCALL_64_after_hwframe+0x63/0xcd
View original CVE JSON
{
"id": "CVE-2022-50477",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"published": "2025-10-04T16:15:44.300",
"lastModified": "2026-11-05T21:17:00.987",
"vulnStatus": "Analyzed",
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nrtc: class: Fix potential memleak in devm_rtc_allocate_device()\n\ndevm_rtc_allocate_device() will alloc a rtc_device first, and then run\ndev_set_name(). If dev_set_name() failed, the rtc_device will memleak.\nMove devm_add_action_or_reset() in front of dev_set_name() to prevent\nmemleak.\n\nunreferenced object 0xffff888110a53000 (size 2048):\n comm \"python3\", pid 470, jiffies 4296078308 (age 58.882s)\n hex dump (first 32 bytes):\n 00 00 00 00 00 00 00 00 08 30 a5 10 81 88 ff ff .........0......\n 08 30 a5 10 81 88 ff ff 00 00 00 00 00 00 00 00 .0..............\n backtrace:\n [<000000004aac0364>] kmalloc_trace+0x21/0x110\n [<000000000ff02202>] devm_rtc_allocate_device+0xd4/0x400\n [<000000001bdf5639>] devm_rtc_device_register+0x1a/0x80\n [<00000000351bf81c>] rx4581_probe+0xdd/0x110 [rtc_rx4581]\n [<00000000f0eba0ae>] spi_probe+0xde/0x130\n [<00000000bff89ee8>] really_probe+0x175/0x3f0\n [<00000000128e8d84>] __driver_probe_device+0xe6/0x170\n [<00000000ee5bf913>] device_driver_attach+0x32/0x80\n [<00000000f3f28f92>] bind_store+0x10b/0x1a0\n [<000000009ff812d8>] drv_attr_store+0x49/0x70\n [<000000008139c323>] sysfs_kf_write+0x8d/0xb0\n [<00000000b6146e01>] kernfs_fop_write_iter+0x214/0x2d0\n [<00000000ecbe3895>] vfs_write+0x61a/0x7d0\n [<00000000aa2196ea>] ksys_write+0xc8/0x190\n [<0000000046a600f5>] do_syscall_64+0x37/0x90\n [<00000000541a336f>] entry_SYSCALL_64_after_hwframe+0x63/0xcd"
}
],
"affected": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"affectedData": [
{
"vendor": "Linux",
"product": "Linux",
"defaultStatus": "unaffected",
"programFiles": [
"drivers/rtc/class.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"versions": [
{
"version": "24d23181e43d72ca692a479e70dfe5b0b5dd33f1",
"lessThan": "0bcfc8fd3e596994f527b46730579428b3a4fa5f",
"versionType": "git",
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}
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},
{
"vendor": "Linux",
"product": "Linux",
"defaultStatus": "affected",
"programFiles": [
"drivers/rtc/class.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"versions": [
{
"version": "5.16",
"status": "affected"
},
{
"version": "0",
"lessThan": "5.16",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.0.16",
"lessThanOrEqual": "6.0.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.1.2",
"lessThanOrEqual": "6.1.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.2",
"lessThanOrEqual": "*",
"versionType": "original_commit_for_fix",
"status": "unaffected"
}
]
}
]
}
],
"metrics": {
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{
"source": "[email protected]",
"type": "Primary",
"cvssData": {
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"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"baseScore": 5.5,
"baseSeverity": "MEDIUM",
"attackVector": "LOCAL",
"attackComplexity": "LOW",
"privilegesRequired": "LOW",
"userInteraction": "NONE",
"scope": "UNCHANGED",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"availabilityImpact": "HIGH"
},
"exploitabilityScore": 1.8,
"impactScore": 3.6
}
],
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"timestamp": "2026-11-05T20:11:55.370621Z",
"id": "CVE-2022-50477",
"options": [
{
"exploitation": "none"
},
{
"automatable": "no"
},
{
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}
],
"role": "CISA Coordinator",
"version": "2.0.3"
}
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]
},
"weaknesses": [
{
"source": "[email protected]",
"type": "Primary",
"description": [
{
"lang": "en",
"value": "CWE-401"
}
]
}
],
"configurations": [
{
"nodes": [
{
"operator": "OR",
"negate": false,
"cpeMatch": [
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"matchCriteriaId": "C720A569-3D93-4D77-95F6-E2B3A3267D9F"
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"references": [
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"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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}