CVE-2022-50578
Estado: AplazadaSin puntuar—
In the Linux kernel, the following vulnerability has been resolved:
class: fix possible memory leak in __class_register()
If class_add_groups() returns error, the 'cp->subsys' need be unregister, and the 'cp' need be freed.
We can not call kset_unregister() here, because the 'cls' will be freed in callback function class_release() and it's also freed in caller's error path, it will cause double free.
So fix this by calling kobject_del() and kfree_const(name) to cleanup kobject. Besides, call kfree() to free the 'cp'.
Fault injection test can trigger this:
Detalles técnicos trazas, registros y código del informe original
unreferenced object 0xffff888102fa8190 (size 8):
comm "modprobe", pid 502, jiffies 4294906074 (age 49.296s)
hex dump (first 8 bytes):
70 6b 74 63 64 76 64 00 pktcdvd.
backtrace:
[<00000000e7c7703d>] __kmalloc_track_caller+0x1ae/0x320
[<000000005e4d70bc>] kstrdup+0x3a/0x70
[<00000000c2e5e85a>] kstrdup_const+0x68/0x80
[<000000000049a8c7>] kvasprintf_const+0x10b/0x190
[<0000000029123163>] kobject_set_name_vargs+0x56/0x150
[<00000000747219c9>] kobject_set_name+0xab/0xe0
[<0000000005f1ea4e>] __class_register+0x15c/0x49a
unreferenced object 0xffff888037274000 (size 1024):
comm "modprobe", pid 502, jiffies 4294906074 (age 49.296s)
hex dump (first 32 bytes):
00 40 27 37 80 88 ff ff 00 40 27 37 80 88 ff ff .@'7.....@'7....
00 00 00 00 ad 4e ad de ff ff ff ff 00 00 00 00 .....N..........
backtrace:
[<00000000151f9600>] kmem_cache_alloc_trace+0x17c/0x2f0
[<00000000ecf3dd95>] __class_register+0x86/0x49aCVSS
NVD no ha asignado puntuación CVSS a esta CVE (habitual desde el cambio de política de abril de 2026).
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.24%
- Percentil entre todas las CVEs puntuadas: 14
- Fecha de la puntuación: 6/10/2026
EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).
Tecnologías afectadas (1)
⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.
Referencias
- https://git.kernel.org/stable/c/18a7200646958cf8e1b8a933de08122fc50676cd
- https://git.kernel.org/stable/c/3bb9c92c27624ad076419a70f2b1a30cd1f8bbbd
- https://git.kernel.org/stable/c/3e0efc3f3f5e5c73996782f8db69963e501bb878
- https://git.kernel.org/stable/c/417ef049e3fd3b0d2593c1d5ffa3d0d5d0a018a7
- https://git.kernel.org/stable/c/4efa5443817c1b6de22d401aeca5b2481e835f8c
- https://git.kernel.org/stable/c/8c3e8a6bdb5253b97ad532570f8b5db5f7a06407
- https://git.kernel.org/stable/c/abaedb68a769e6bf36836b55a2f49b531c5f3f7b
- https://git.kernel.org/stable/c/e764ad5918a099ebeb909ccff83893a714e497e1
JSON original (NVD)
Mostrar
{
"id": "CVE-2022-50578",
"cveTags": [],
"metrics": {},
"affected": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"affectedData": [
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "ced6473e7486702f530a49f886b73195e4977734",
"lessThan": "4efa5443817c1b6de22d401aeca5b2481e835f8c",
"versionType": "git"
},
{
"status": "affected",
"version": "ced6473e7486702f530a49f886b73195e4977734",
"lessThan": "3bb9c92c27624ad076419a70f2b1a30cd1f8bbbd",
"versionType": "git"
},
{
"status": "affected",
"version": "ced6473e7486702f530a49f886b73195e4977734",
"lessThan": "3e0efc3f3f5e5c73996782f8db69963e501bb878",
"versionType": "git"
},
{
"status": "affected",
"version": "ced6473e7486702f530a49f886b73195e4977734",
"lessThan": "18a7200646958cf8e1b8a933de08122fc50676cd",
"versionType": "git"
},
{
"status": "affected",
"version": "ced6473e7486702f530a49f886b73195e4977734",
"lessThan": "417ef049e3fd3b0d2593c1d5ffa3d0d5d0a018a7",
"versionType": "git"
},
{
"status": "affected",
"version": "ced6473e7486702f530a49f886b73195e4977734",
"lessThan": "e764ad5918a099ebeb909ccff83893a714e497e1",
"versionType": "git"
},
{
"status": "affected",
"version": "ced6473e7486702f530a49f886b73195e4977734",
"lessThan": "abaedb68a769e6bf36836b55a2f49b531c5f3f7b",
"versionType": "git"
},
{
"status": "affected",
"version": "ced6473e7486702f530a49f886b73195e4977734",
"lessThan": "8c3e8a6bdb5253b97ad532570f8b5db5f7a06407",
"versionType": "git"
}
],
"programFiles": [
"drivers/base/class.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "4.10"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "4.10",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "4.14.303",
"versionType": "semver",
"lessThanOrEqual": "4.14.*"
},
{
"status": "unaffected",
"version": "4.19.270",
"versionType": "semver",
"lessThanOrEqual": "4.19.*"
},
{
"status": "unaffected",
"version": "5.4.229",
"versionType": "semver",
"lessThanOrEqual": "5.4.*"
},
{
"status": "unaffected",
"version": "5.10.163",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.86",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.0.16",
"versionType": "semver",
"lessThanOrEqual": "6.0.*"
},
{
"status": "unaffected",
"version": "6.1.2",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.2",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/base/class.c"
],
"defaultStatus": "affected"
}
]
}
],
"published": "2025-10-22T14:15:42.803",
"references": [
{
"url": "https://git.kernel.org/stable/c/18a7200646958cf8e1b8a933de08122fc50676cd",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/3bb9c92c27624ad076419a70f2b1a30cd1f8bbbd",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/3e0efc3f3f5e5c73996782f8db69963e501bb878",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/417ef049e3fd3b0d2593c1d5ffa3d0d5d0a018a7",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/4efa5443817c1b6de22d401aeca5b2481e835f8c",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/8c3e8a6bdb5253b97ad532570f8b5db5f7a06407",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/abaedb68a769e6bf36836b55a2f49b531c5f3f7b",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/e764ad5918a099ebeb909ccff83893a714e497e1",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
],
"vulnStatus": "Deferred",
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nclass: fix possible memory leak in __class_register()\n\nIf class_add_groups() returns error, the 'cp->subsys' need be\nunregister, and the 'cp' need be freed.\n\nWe can not call kset_unregister() here, because the 'cls' will\nbe freed in callback function class_release() and it's also\nfreed in caller's error path, it will cause double free.\n\nSo fix this by calling kobject_del() and kfree_const(name) to\ncleanup kobject. Besides, call kfree() to free the 'cp'.\n\nFault injection test can trigger this:\n\nunreferenced object 0xffff888102fa8190 (size 8):\n comm \"modprobe\", pid 502, jiffies 4294906074 (age 49.296s)\n hex dump (first 8 bytes):\n 70 6b 74 63 64 76 64 00 pktcdvd.\n backtrace:\n [<00000000e7c7703d>] __kmalloc_track_caller+0x1ae/0x320\n [<000000005e4d70bc>] kstrdup+0x3a/0x70\n [<00000000c2e5e85a>] kstrdup_const+0x68/0x80\n [<000000000049a8c7>] kvasprintf_const+0x10b/0x190\n [<0000000029123163>] kobject_set_name_vargs+0x56/0x150\n [<00000000747219c9>] kobject_set_name+0xab/0xe0\n [<0000000005f1ea4e>] __class_register+0x15c/0x49a\n\nunreferenced object 0xffff888037274000 (size 1024):\n comm \"modprobe\", pid 502, jiffies 4294906074 (age 49.296s)\n hex dump (first 32 bytes):\n 00 40 27 37 80 88 ff ff 00 40 27 37 80 88 ff ff .@'7.....@'7....\n 00 00 00 00 ad 4e ad de ff ff ff ff 00 00 00 00 .....N..........\n backtrace:\n [<00000000151f9600>] kmem_cache_alloc_trace+0x17c/0x2f0\n [<00000000ecf3dd95>] __class_register+0x86/0x49a"
}
],
"lastModified": "2026-06-17T05:23:49.567",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}