CVE-2022-49926 (GCVE-0-2022-49926)
Vulnerability from cvelistv5
Published
2025-05-01 14:11
Modified
2025-10-01 14:56
Severity ?
VLAI Severity ?
EPSS score ?
Summary
In the Linux kernel, the following vulnerability has been resolved:
net: dsa: Fix possible memory leaks in dsa_loop_init()
kmemleak reported memory leaks in dsa_loop_init():
kmemleak: 12 new suspected memory leaks
unreferenced object 0xffff8880138ce000 (size 2048):
comm "modprobe", pid 390, jiffies 4295040478 (age 238.976s)
backtrace:
[<000000006a94f1d5>] kmalloc_trace+0x26/0x60
[<00000000a9c44622>] phy_device_create+0x5d/0x970
[<00000000d0ee2afc>] get_phy_device+0xf3/0x2b0
[<00000000dca0c71f>] __fixed_phy_register.part.0+0x92/0x4e0
[<000000008a834798>] fixed_phy_register+0x84/0xb0
[<0000000055223fcb>] dsa_loop_init+0xa9/0x116 [dsa_loop]
...
There are two reasons for memleak in dsa_loop_init().
First, fixed_phy_register() create and register phy_device:
fixed_phy_register()
get_phy_device()
phy_device_create() # freed by phy_device_free()
phy_device_register() # freed by phy_device_remove()
But fixed_phy_unregister() only calls phy_device_remove().
So the memory allocated in phy_device_create() is leaked.
Second, when mdio_driver_register() fail in dsa_loop_init(),
it just returns and there is no cleanup for phydevs.
Fix the problems by catching the error of mdio_driver_register()
in dsa_loop_init(), then calling both fixed_phy_unregister() and
phy_device_free() to release phydevs.
Also add a function for phydevs cleanup to avoid duplacate.
References
Impacted products
| Vendor | Product | Version | |||||||
|---|---|---|---|---|---|---|---|---|---|
| ▼ | Linux | Linux |
Version: 98cd1552ea27e512c7e99e2aa76042a26e4fb25c Version: 98cd1552ea27e512c7e99e2aa76042a26e4fb25c Version: 98cd1552ea27e512c7e99e2aa76042a26e4fb25c Version: 98cd1552ea27e512c7e99e2aa76042a26e4fb25c Version: 98cd1552ea27e512c7e99e2aa76042a26e4fb25c Version: 98cd1552ea27e512c7e99e2aa76042a26e4fb25c Version: 98cd1552ea27e512c7e99e2aa76042a26e4fb25c |
||||||
|
|||||||||
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"nvd": "{\"cve\":{\"id\":\"CVE-2022-49926\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-05-01T15:16:18.440\",\"lastModified\":\"2025-10-01T15:15:38.657\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nnet: dsa: Fix possible memory leaks in dsa_loop_init()\\n\\nkmemleak reported memory leaks in dsa_loop_init():\\n\\nkmemleak: 12 new suspected memory leaks\\n\\nunreferenced object 0xffff8880138ce000 (size 2048):\\n comm \\\"modprobe\\\", pid 390, jiffies 4295040478 (age 238.976s)\\n backtrace:\\n [\u003c000000006a94f1d5\u003e] kmalloc_trace+0x26/0x60\\n [\u003c00000000a9c44622\u003e] phy_device_create+0x5d/0x970\\n [\u003c00000000d0ee2afc\u003e] get_phy_device+0xf3/0x2b0\\n [\u003c00000000dca0c71f\u003e] __fixed_phy_register.part.0+0x92/0x4e0\\n [\u003c000000008a834798\u003e] fixed_phy_register+0x84/0xb0\\n [\u003c0000000055223fcb\u003e] dsa_loop_init+0xa9/0x116 [dsa_loop]\\n ...\\n\\nThere are two reasons for memleak in dsa_loop_init().\\n\\nFirst, fixed_phy_register() create and register phy_device:\\n\\nfixed_phy_register()\\n get_phy_device()\\n phy_device_create() # freed by phy_device_free()\\n phy_device_register() # freed by phy_device_remove()\\n\\nBut fixed_phy_unregister() only calls phy_device_remove().\\nSo the memory allocated in phy_device_create() is leaked.\\n\\nSecond, when mdio_driver_register() fail in dsa_loop_init(),\\nit just returns and there is no cleanup for phydevs.\\n\\nFix the problems by catching the error of mdio_driver_register()\\nin dsa_loop_init(), then calling both fixed_phy_unregister() and\\nphy_device_free() to release phydevs.\\nAlso add a function for phydevs cleanup to avoid duplacate.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: net: dsa: Se corrigen posibles fugas de memoria en dsa_loop_init() kmemleak inform\u00f3 de fugas de memoria en dsa_loop_init(): kmemleak: 12 nuevas fugas de memoria sospechosas objeto no referenciado 0xffff8880138ce000 (tama\u00f1o 2048): comm \\\"modprobe\\\", pid 390, jiffies 4295040478 (edad 238,976 s) backtrace: [\u0026lt;000000006a94f1d5\u0026gt;] kmalloc_trace+0x26/0x60 [\u0026lt;00000000a9c44622\u0026gt;] phy_device_create+0x5d/0x970 [\u0026lt;00000000d0ee2afc\u0026gt;] Hay dos razones para la p\u00e9rdida de memoria en dsa_loop_init(). 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"vulnrichment": {
"containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 5.5, \"attackVector\": \"LOCAL\", \"baseSeverity\": \"MEDIUM\", \"vectorString\": \"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\", \"integrityImpact\": \"NONE\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"HIGH\", \"privilegesRequired\": \"LOW\", \"confidentialityImpact\": \"NONE\"}}, {\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2022-49926\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2025-10-01T14:56:55.465570Z\"}}}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-401\", \"description\": \"CWE-401 Missing Release of Memory after Effective Lifetime\"}]}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2025-10-01T14:18:00.916Z\"}}], \"cna\": {\"title\": \"net: dsa: Fix possible memory leaks in dsa_loop_init()\", \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"98cd1552ea27e512c7e99e2aa76042a26e4fb25c\", \"lessThan\": \"935b4beb724946a37cebf97191592d4879d3a3a3\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"98cd1552ea27e512c7e99e2aa76042a26e4fb25c\", \"lessThan\": \"d593e1ede655b74c42e4e4fe285ea64aee96fb5c\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"98cd1552ea27e512c7e99e2aa76042a26e4fb25c\", \"lessThan\": \"bbc5d7b46a729bfcbb5544f6612b7a67dd4f4d6f\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"98cd1552ea27e512c7e99e2aa76042a26e4fb25c\", \"lessThan\": \"37a098fc9b42bd7fce66764866aa514639667b6e\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"98cd1552ea27e512c7e99e2aa76042a26e4fb25c\", \"lessThan\": \"9f555b1584fc2d5d16ee3c4d9438e93ac7c502c7\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"98cd1552ea27e512c7e99e2aa76042a26e4fb25c\", \"lessThan\": \"4d2024b138d9f7b02ae13ee997fd3a71e9e46254\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"98cd1552ea27e512c7e99e2aa76042a26e4fb25c\", \"lessThan\": \"633efc8b3dc96f56f5a57f2a49764853a2fa3f50\", \"versionType\": \"git\"}], \"programFiles\": [\"drivers/net/dsa/dsa_loop.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"4.12\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"4.12\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"4.14.299\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"4.14.*\"}, {\"status\": \"unaffected\", \"version\": \"4.19.265\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"4.19.*\"}, {\"status\": \"unaffected\", \"version\": \"5.4.224\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.4.*\"}, {\"status\": \"unaffected\", \"version\": \"5.10.154\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.10.*\"}, {\"status\": \"unaffected\", \"version\": \"5.15.78\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.15.*\"}, {\"status\": \"unaffected\", \"version\": \"6.0.8\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.0.*\"}, {\"status\": \"unaffected\", \"version\": \"6.1\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"drivers/net/dsa/dsa_loop.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/935b4beb724946a37cebf97191592d4879d3a3a3\"}, {\"url\": \"https://git.kernel.org/stable/c/d593e1ede655b74c42e4e4fe285ea64aee96fb5c\"}, {\"url\": \"https://git.kernel.org/stable/c/bbc5d7b46a729bfcbb5544f6612b7a67dd4f4d6f\"}, {\"url\": \"https://git.kernel.org/stable/c/37a098fc9b42bd7fce66764866aa514639667b6e\"}, {\"url\": \"https://git.kernel.org/stable/c/9f555b1584fc2d5d16ee3c4d9438e93ac7c502c7\"}, {\"url\": \"https://git.kernel.org/stable/c/4d2024b138d9f7b02ae13ee997fd3a71e9e46254\"}, {\"url\": \"https://git.kernel.org/stable/c/633efc8b3dc96f56f5a57f2a49764853a2fa3f50\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nnet: dsa: Fix possible memory leaks in dsa_loop_init()\\n\\nkmemleak reported memory leaks in dsa_loop_init():\\n\\nkmemleak: 12 new suspected memory leaks\\n\\nunreferenced object 0xffff8880138ce000 (size 2048):\\n comm \\\"modprobe\\\", pid 390, jiffies 4295040478 (age 238.976s)\\n backtrace:\\n [\u003c000000006a94f1d5\u003e] kmalloc_trace+0x26/0x60\\n [\u003c00000000a9c44622\u003e] phy_device_create+0x5d/0x970\\n [\u003c00000000d0ee2afc\u003e] get_phy_device+0xf3/0x2b0\\n [\u003c00000000dca0c71f\u003e] __fixed_phy_register.part.0+0x92/0x4e0\\n [\u003c000000008a834798\u003e] fixed_phy_register+0x84/0xb0\\n [\u003c0000000055223fcb\u003e] dsa_loop_init+0xa9/0x116 [dsa_loop]\\n ...\\n\\nThere are two reasons for memleak in dsa_loop_init().\\n\\nFirst, fixed_phy_register() create and register phy_device:\\n\\nfixed_phy_register()\\n get_phy_device()\\n phy_device_create() # freed by phy_device_free()\\n phy_device_register() # freed by phy_device_remove()\\n\\nBut fixed_phy_unregister() only calls phy_device_remove().\\nSo the memory allocated in phy_device_create() is leaked.\\n\\nSecond, when mdio_driver_register() fail in dsa_loop_init(),\\nit just returns and there is no cleanup for phydevs.\\n\\nFix the problems by catching the error of mdio_driver_register()\\nin dsa_loop_init(), then calling both fixed_phy_unregister() and\\nphy_device_free() to release phydevs.\\nAlso add a function for phydevs cleanup to avoid duplacate.\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"4.14.299\", \"versionStartIncluding\": \"4.12\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"4.19.265\", \"versionStartIncluding\": \"4.12\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.4.224\", \"versionStartIncluding\": \"4.12\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.154\", \"versionStartIncluding\": \"4.12\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.78\", \"versionStartIncluding\": \"4.12\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.0.8\", \"versionStartIncluding\": \"4.12\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1\", \"versionStartIncluding\": \"4.12\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2025-05-04T08:48:56.154Z\"}}}",
"cveMetadata": "{\"cveId\": \"CVE-2022-49926\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-10-01T14:56:58.099Z\", \"dateReserved\": \"2025-05-01T14:05:17.253Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2025-05-01T14:11:04.691Z\", \"assignerShortName\": \"Linux\"}",
"dataType": "CVE_RECORD",
"dataVersion": "5.1"
}
}
}
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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.
- 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.
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