CVE-2022-50457 (GCVE-0-2022-50457)
Vulnerability from cvelistv5
Published
2025-10-01 11:45
Modified
2025-10-01 11:45
Severity ?
VLAI Severity ?
EPSS score ?
Summary
In the Linux kernel, the following vulnerability has been resolved:
mtd: core: Fix refcount error in del_mtd_device()
del_mtd_device() will call of_node_put() to mtd_get_of_node(mtd), which
is mtd->dev.of_node. However, memset(&mtd->dev, 0) is called before
of_node_put(). As the result, of_node_put() won't do anything in
del_mtd_device(), and causes the refcount leak.
del_mtd_device()
memset(&mtd->dev, 0, sizeof(mtd->dev) # clear mtd->dev
of_node_put()
mtd_get_of_node(mtd) # mtd->dev is cleared, can't locate of_node
# of_node_put(NULL) won't do anything
Fix the error by caching the pointer of the device_node.
OF: ERROR: memory leak, expected refcount 1 instead of 2,
of_node_get()/of_node_put() unbalanced - destroy cset entry: attach
overlay node /spi/spi-sram@0
CPU: 3 PID: 275 Comm: python3 Tainted: G N 6.1.0-rc3+ #54
0d8a1edddf51f172ff5226989a7565c6313b08e2
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS
rel-1.15.0-0-g2dd4b9b3f840-prebuilt.qemu.org 04/01/2014
Call Trace:
<TASK>
dump_stack_lvl+0x67/0x83
kobject_get+0x155/0x160
of_node_get+0x1f/0x30
of_fwnode_get+0x43/0x70
fwnode_handle_get+0x54/0x80
fwnode_get_nth_parent+0xc9/0xe0
fwnode_full_name_string+0x3f/0xa0
device_node_string+0x30f/0x750
pointer+0x598/0x7a0
vsnprintf+0x62d/0x9b0
...
cfs_overlay_release+0x30/0x90
config_item_release+0xbe/0x1a0
config_item_put+0x5e/0x80
configfs_rmdir+0x3bd/0x540
vfs_rmdir+0x18c/0x320
do_rmdir+0x198/0x330
__x64_sys_rmdir+0x2c/0x40
do_syscall_64+0x37/0x90
entry_SYSCALL_64_after_hwframe+0x63/0xcd
[<miquel.raynal@bootlin.com>: Light reword of the commit log]
References
Impacted products
{
"containers": {
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"drivers/mtd/mtdcore.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"lessThan": "f6016557f1ef7735963bd8691592d2797bbf91d2",
"status": "affected",
"version": "00596576a05145a1b5672897a82ef87af00becf4",
"versionType": "git"
},
{
"lessThan": "616dc895d982026f41f500c88d1bfea004938cc8",
"status": "affected",
"version": "00596576a05145a1b5672897a82ef87af00becf4",
"versionType": "git"
},
{
"lessThan": "56570bdad5e31c5c538cd6efff5c4510256e1bb4",
"status": "affected",
"version": "00596576a05145a1b5672897a82ef87af00becf4",
"versionType": "git"
}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"drivers/mtd/mtdcore.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "5.17"
},
{
"lessThan": "5.17",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.0.*",
"status": "unaffected",
"version": "6.0.16",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"version": "6.1.2",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "6.2",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.0.16",
"versionStartIncluding": "5.17",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.1.2",
"versionStartIncluding": "5.17",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.2",
"versionStartIncluding": "5.17",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmtd: core: Fix refcount error in del_mtd_device()\n\ndel_mtd_device() will call of_node_put() to mtd_get_of_node(mtd), which\nis mtd-\u003edev.of_node. However, memset(\u0026mtd-\u003edev, 0) is called before\nof_node_put(). As the result, of_node_put() won\u0027t do anything in\ndel_mtd_device(), and causes the refcount leak.\n\ndel_mtd_device()\n memset(\u0026mtd-\u003edev, 0, sizeof(mtd-\u003edev) # clear mtd-\u003edev\n of_node_put()\n mtd_get_of_node(mtd) # mtd-\u003edev is cleared, can\u0027t locate of_node\n # of_node_put(NULL) won\u0027t do anything\n\nFix the error by caching the pointer of the device_node.\n\nOF: ERROR: memory leak, expected refcount 1 instead of 2,\nof_node_get()/of_node_put() unbalanced - destroy cset entry: attach\noverlay node /spi/spi-sram@0\nCPU: 3 PID: 275 Comm: python3 Tainted: G N 6.1.0-rc3+ #54\n 0d8a1edddf51f172ff5226989a7565c6313b08e2\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS\nrel-1.15.0-0-g2dd4b9b3f840-prebuilt.qemu.org 04/01/2014\nCall Trace:\n\u003cTASK\u003e\n dump_stack_lvl+0x67/0x83\n kobject_get+0x155/0x160\n of_node_get+0x1f/0x30\n of_fwnode_get+0x43/0x70\n fwnode_handle_get+0x54/0x80\n fwnode_get_nth_parent+0xc9/0xe0\n fwnode_full_name_string+0x3f/0xa0\n device_node_string+0x30f/0x750\n pointer+0x598/0x7a0\n vsnprintf+0x62d/0x9b0\n ...\n cfs_overlay_release+0x30/0x90\n config_item_release+0xbe/0x1a0\n config_item_put+0x5e/0x80\n configfs_rmdir+0x3bd/0x540\n vfs_rmdir+0x18c/0x320\n do_rmdir+0x198/0x330\n __x64_sys_rmdir+0x2c/0x40\n do_syscall_64+0x37/0x90\n entry_SYSCALL_64_after_hwframe+0x63/0xcd\n\n[\u003cmiquel.raynal@bootlin.com\u003e: Light reword of the commit log]"
}
],
"providerMetadata": {
"dateUpdated": "2025-10-01T11:45:30.263Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/f6016557f1ef7735963bd8691592d2797bbf91d2"
},
{
"url": "https://git.kernel.org/stable/c/616dc895d982026f41f500c88d1bfea004938cc8"
},
{
"url": "https://git.kernel.org/stable/c/56570bdad5e31c5c538cd6efff5c4510256e1bb4"
}
],
"title": "mtd: core: Fix refcount error in del_mtd_device()",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2022-50457",
"datePublished": "2025-10-01T11:45:30.263Z",
"dateReserved": "2025-10-01T11:38:45.640Z",
"dateUpdated": "2025-10-01T11:45:30.263Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.1",
"vulnerability-lookup:meta": {
"nvd": "{\"cve\":{\"id\":\"CVE-2022-50457\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-10-01T12:15:38.967\",\"lastModified\":\"2025-10-02T19:12:17.160\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nmtd: core: Fix refcount error in del_mtd_device()\\n\\ndel_mtd_device() will call of_node_put() to mtd_get_of_node(mtd), which\\nis mtd-\u003edev.of_node. However, memset(\u0026mtd-\u003edev, 0) is called before\\nof_node_put(). As the result, of_node_put() won\u0027t do anything in\\ndel_mtd_device(), and causes the refcount leak.\\n\\ndel_mtd_device()\\n memset(\u0026mtd-\u003edev, 0, sizeof(mtd-\u003edev) # clear mtd-\u003edev\\n of_node_put()\\n mtd_get_of_node(mtd) # mtd-\u003edev is cleared, can\u0027t locate of_node\\n # of_node_put(NULL) won\u0027t do anything\\n\\nFix the error by caching the pointer of the device_node.\\n\\nOF: ERROR: memory leak, expected refcount 1 instead of 2,\\nof_node_get()/of_node_put() unbalanced - destroy cset entry: attach\\noverlay node /spi/spi-sram@0\\nCPU: 3 PID: 275 Comm: python3 Tainted: G N 6.1.0-rc3+ #54\\n 0d8a1edddf51f172ff5226989a7565c6313b08e2\\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS\\nrel-1.15.0-0-g2dd4b9b3f840-prebuilt.qemu.org 04/01/2014\\nCall Trace:\\n\u003cTASK\u003e\\n dump_stack_lvl+0x67/0x83\\n kobject_get+0x155/0x160\\n of_node_get+0x1f/0x30\\n of_fwnode_get+0x43/0x70\\n fwnode_handle_get+0x54/0x80\\n fwnode_get_nth_parent+0xc9/0xe0\\n fwnode_full_name_string+0x3f/0xa0\\n device_node_string+0x30f/0x750\\n pointer+0x598/0x7a0\\n vsnprintf+0x62d/0x9b0\\n ...\\n cfs_overlay_release+0x30/0x90\\n config_item_release+0xbe/0x1a0\\n config_item_put+0x5e/0x80\\n configfs_rmdir+0x3bd/0x540\\n vfs_rmdir+0x18c/0x320\\n do_rmdir+0x198/0x330\\n __x64_sys_rmdir+0x2c/0x40\\n do_syscall_64+0x37/0x90\\n entry_SYSCALL_64_after_hwframe+0x63/0xcd\\n\\n[\u003cmiquel.raynal@bootlin.com\u003e: Light reword of the commit log]\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/56570bdad5e31c5c538cd6efff5c4510256e1bb4\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/616dc895d982026f41f500c88d1bfea004938cc8\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/f6016557f1ef7735963bd8691592d2797bbf91d2\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
}
}
Loading…
Loading…
Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
Loading…
Loading…