CVE-2022-49853 (GCVE-0-2022-49853)
Vulnerability from cvelistv5 – Published: 2025-05-01 14:10 – Updated: 2026-05-11 19:08
VLAI
EPSS
VEX
Title
net: macvlan: fix memory leaks of macvlan_common_newlink
Summary
In the Linux kernel, the following vulnerability has been resolved:
net: macvlan: fix memory leaks of macvlan_common_newlink
kmemleak reports memory leaks in macvlan_common_newlink, as follows:
ip link add link eth0 name .. type macvlan mode source macaddr add
<MAC-ADDR>
kmemleak reports:
unreferenced object 0xffff8880109bb140 (size 64):
comm "ip", pid 284, jiffies 4294986150 (age 430.108s)
hex dump (first 32 bytes):
00 00 00 00 00 00 00 00 b8 aa 5a 12 80 88 ff ff ..........Z.....
80 1b fa 0d 80 88 ff ff 1e ff ac af c7 c1 6b 6b ..............kk
backtrace:
[<ffffffff813e06a7>] kmem_cache_alloc_trace+0x1c7/0x300
[<ffffffff81b66025>] macvlan_hash_add_source+0x45/0xc0
[<ffffffff81b66a67>] macvlan_changelink_sources+0xd7/0x170
[<ffffffff81b6775c>] macvlan_common_newlink+0x38c/0x5a0
[<ffffffff81b6797e>] macvlan_newlink+0xe/0x20
[<ffffffff81d97f8f>] __rtnl_newlink+0x7af/0xa50
[<ffffffff81d98278>] rtnl_newlink+0x48/0x70
...
In the scenario where the macvlan mode is configured as 'source',
macvlan_changelink_sources() will be execured to reconfigure list of
remote source mac addresses, at the same time, if register_netdevice()
return an error, the resource generated by macvlan_changelink_sources()
is not cleaned up.
Using this patch, in the case of an error, it will execute
macvlan_flush_sources() to ensure that the resource is cleaned up.
Severity
5.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-10-01 16:07 UTC
CWE
- CWE-401 - Missing Release of Memory after Effective Lifetime
Assigner
References
8 references
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
aa5fd0fb77486b8a6764ead8627baa14790e4280 , < 9f288e338be206713d79b29144c27fca4503c39b
(git)
Affected: aa5fd0fb77486b8a6764ead8627baa14790e4280 , < 21d3a8b6a1e39e7529ce9de07316ee13a63f305b (git) Affected: aa5fd0fb77486b8a6764ead8627baa14790e4280 , < a81b44d1df1f07f00c0dcc0a0b3d2fa24a46289e (git) Affected: aa5fd0fb77486b8a6764ead8627baa14790e4280 , < 685e73e3f7a9fb75cbf049a9d0b7c45cc6b57b2e (git) Affected: aa5fd0fb77486b8a6764ead8627baa14790e4280 , < 956e0216a19994443c90ba2ea6b0b284c9c4f9cb (git) Affected: aa5fd0fb77486b8a6764ead8627baa14790e4280 , < a8d67367ab33604326cc37ab44fd1801bf5691ba (git) Affected: aa5fd0fb77486b8a6764ead8627baa14790e4280 , < 9ea003c4671b2fc455320ecf6d4a43b0a3c1878a (git) Affected: aa5fd0fb77486b8a6764ead8627baa14790e4280 , < 23569b5652ee8e8e55a12f7835f59af6f3cefc30 (git) |
guessed | |
| Linux | Linux |
Affected:
4.9
Unaffected: 0 , < 4.9 (semver) Unaffected: 4.9.334 , ≤ 4.9.* (semver) Unaffected: 4.14.300 , ≤ 4.14.* (semver) Unaffected: 4.19.267 , ≤ 4.19.* (semver) Unaffected: 5.4.225 , ≤ 5.4.* (semver) Unaffected: 5.10.155 , ≤ 5.10.* (semver) Unaffected: 5.15.79 , ≤ 5.15.* (semver) Unaffected: 6.0.9 , ≤ 6.0.* (semver) Unaffected: 6.1 , ≤ * (original_commit_for_fix) |
guessed |
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: macvlan: fix memory leaks of macvlan_common_newlink\n\nkmemleak reports memory leaks in macvlan_common_newlink, as follows:\n\n ip link add link eth0 name .. type macvlan mode source macaddr add\n \u003cMAC-ADDR\u003e\n\nkmemleak reports:\n\nunreferenced object 0xffff8880109bb140 (size 64):\n comm \"ip\", pid 284, jiffies 4294986150 (age 430.108s)\n hex dump (first 32 bytes):\n 00 00 00 00 00 00 00 00 b8 aa 5a 12 80 88 ff ff ..........Z.....\n 80 1b fa 0d 80 88 ff ff 1e ff ac af c7 c1 6b 6b ..............kk\n backtrace:\n [\u003cffffffff813e06a7\u003e] kmem_cache_alloc_trace+0x1c7/0x300\n [\u003cffffffff81b66025\u003e] macvlan_hash_add_source+0x45/0xc0\n [\u003cffffffff81b66a67\u003e] macvlan_changelink_sources+0xd7/0x170\n [\u003cffffffff81b6775c\u003e] macvlan_common_newlink+0x38c/0x5a0\n [\u003cffffffff81b6797e\u003e] macvlan_newlink+0xe/0x20\n [\u003cffffffff81d97f8f\u003e] __rtnl_newlink+0x7af/0xa50\n [\u003cffffffff81d98278\u003e] rtnl_newlink+0x48/0x70\n ...\n\nIn the scenario where the macvlan mode is configured as \u0027source\u0027,\nmacvlan_changelink_sources() will be execured to reconfigure list of\nremote source mac addresses, at the same time, if register_netdevice()\nreturn an error, the resource generated by macvlan_changelink_sources()\nis not cleaned up.\n\nUsing this patch, in the case of an error, it will execute\nmacvlan_flush_sources() to ensure that the resource is cleaned up."
},
{
"lang": "es",
"value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: net: macvlan: corregir fugas de memoria de macvlan_common_newlink kmemleak informa de fugas de memoria en macvlan_common_newlink, como se indica a continuaci\u00f3n: ip link add link eth0 name .. type macvlan mode source macaddr add kmemleak informa: objeto no referenciado 0xffff8880109bb140 (tama\u00f1o 64): comm \"ip\", pid 284, jiffies 4294986150 (edad 430.108s) volcado hexadecimal (primeros 32 bytes): 00 00 00 00 00 00 00 00 b8 aa 5a 12 80 88 ff ff ..........Z..... 80 1b fa 0d 80 88 ff ff 1e ff ac af c7 c1 6b 6b ..............kk seguimiento inverso: [] kmem_cache_alloc_trace+0x1c7/0x300 [] macvlan_hash_add_source+0x45/0xc0 [] macvlan_changelink_sources+0xd7/0x170 [] macvlan_common_newlink+0x38c/0x5a0 [] macvlan_newlink+0xe/0x20 [] __rtnl_newlink+0x7af/0xa50 [] rtnl_newlink+0x48/0x70 ... En el escenario donde el modo macvlan est\u00e1 configurado como \u0027origen\u0027, se ejecutar\u00e1 macvlan_changelink_sources() para reconfigurar la lista de direcciones MAC de origen remoto. Al mismo tiempo, si register_netdevice() devuelve un error, el recurso generado por macvlan_changelink_sources() no se limpia. Con este parche, en caso de error, se ejecutar\u00e1 macvlan_flush_sources() para garantizar que el recurso se limpie."
}
],
"id": "CVE-2022-49853",
"lastModified": "2026-06-17T05:19:18.650",
"metrics": {
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{
"cvssData": {
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"attackVector": "LOCAL",
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"integrityImpact": "NONE",
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},
{
"automatable": "no"
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{
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}
],
"role": "CISA Coordinator",
"timestamp": "2025-10-01T16:07:26.571927Z",
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}
}
]
},
"published": "2025-05-01T15:16:08.890",
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"tags": [
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}
],
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"vulnStatus": "Modified",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-401"
}
],
"source": "nvd@nist.gov",
"type": "Primary"
},
{
"description": [
{
"lang": "en",
"value": "CWE-401"
}
],
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"type": "Secondary"
}
]
}
},
"redhat_vex": {
"aggregate_severity": "Moderate",
"current_release_date": "2026-06-29T21:19:19+00:00",
"cve": "CVE-2022-49853",
"id": "CVE-2022-49853",
"initial_release_date": "2022-01-01T00:00:00+00:00",
"product_status:fixed": "441",
"product_status:known_affected": "80",
"product_status:known_not_affected": "76",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "kernel: net: macvlan: fix memory leaks of macvlan_common_newlink",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2022/cve-2022-49853.json",
"version": "3"
},
"suse_vex": {
"aggregate_severity": "moderate",
"current_release_date": "2026-09-01T01:26:05Z",
"cve": "CVE-2022-49853",
"id": "CVE-2022-49853",
"initial_release_date": "2025-05-07T02:19:40Z",
"product_status:known_affected": "505",
"product_status:known_not_affected": "164",
"product_status:recommended": "284",
"source": "SUSE CSAF VEX",
"status": "interim",
"title": "SUSE CVE CVE-2022-49853",
"url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2022-49853.json",
"version": "55"
},
"vulnrichment": {
"containers": {
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"metrics": [
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"version": "3.1"
}
},
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"other": {
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},
{
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},
{
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}
],
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"problemTypes": [
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"description": "CWE-401 Missing Release of Memory after Effective Lifetime",
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"providerMetadata": {
"dateUpdated": "2025-10-01T14:34:52.460Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
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{
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"product": "Linux",
"programFiles": [
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],
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],
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"vendor": "Linux",
"versions": [
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},
{
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"versionType": "original_commit_for_fix"
}
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: macvlan: fix memory leaks of macvlan_common_newlink\n\nkmemleak reports memory leaks in macvlan_common_newlink, as follows:\n\n ip link add link eth0 name .. type macvlan mode source macaddr add\n \u003cMAC-ADDR\u003e\n\nkmemleak reports:\n\nunreferenced object 0xffff8880109bb140 (size 64):\n comm \"ip\", pid 284, jiffies 4294986150 (age 430.108s)\n hex dump (first 32 bytes):\n 00 00 00 00 00 00 00 00 b8 aa 5a 12 80 88 ff ff ..........Z.....\n 80 1b fa 0d 80 88 ff ff 1e ff ac af c7 c1 6b 6b ..............kk\n backtrace:\n [\u003cffffffff813e06a7\u003e] kmem_cache_alloc_trace+0x1c7/0x300\n [\u003cffffffff81b66025\u003e] macvlan_hash_add_source+0x45/0xc0\n [\u003cffffffff81b66a67\u003e] macvlan_changelink_sources+0xd7/0x170\n [\u003cffffffff81b6775c\u003e] macvlan_common_newlink+0x38c/0x5a0\n [\u003cffffffff81b6797e\u003e] macvlan_newlink+0xe/0x20\n [\u003cffffffff81d97f8f\u003e] __rtnl_newlink+0x7af/0xa50\n [\u003cffffffff81d98278\u003e] rtnl_newlink+0x48/0x70\n ...\n\nIn the scenario where the macvlan mode is configured as \u0027source\u0027,\nmacvlan_changelink_sources() will be execured to reconfigure list of\nremote source mac addresses, at the same time, if register_netdevice()\nreturn an error, the resource generated by macvlan_changelink_sources()\nis not cleaned up.\n\nUsing this patch, in the case of an error, it will execute\nmacvlan_flush_sources() to ensure that the resource is cleaned up."
}
],
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"title": "net: macvlan: fix memory leaks of macvlan_common_newlink",
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"datePublished": "2025-05-01T14:10:07.726Z",
"dateReserved": "2025-05-01T14:05:17.230Z",
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}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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