CVE-2022-49853 (GCVE-0-2022-49853)
Vulnerability from cvelistv5
Published
2025-05-01 14:10
Modified
2026-05-11 19:08
Severity ?
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
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.
References
Impacted products
Vendor Product Version
Linux Linux Version: aa5fd0fb77486b8a6764ead8627baa14790e4280
Version: aa5fd0fb77486b8a6764ead8627baa14790e4280
Version: aa5fd0fb77486b8a6764ead8627baa14790e4280
Version: aa5fd0fb77486b8a6764ead8627baa14790e4280
Version: aa5fd0fb77486b8a6764ead8627baa14790e4280
Version: aa5fd0fb77486b8a6764ead8627baa14790e4280
Version: aa5fd0fb77486b8a6764ead8627baa14790e4280
Version: aa5fd0fb77486b8a6764ead8627baa14790e4280
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      "descriptions": [
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          "lang": "en",
          "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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        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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          "url": "https://git.kernel.org/stable/c/685e73e3f7a9fb75cbf049a9d0b7c45cc6b57b2e"
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          "url": "https://git.kernel.org/stable/c/956e0216a19994443c90ba2ea6b0b284c9c4f9cb"
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        {
          "url": "https://git.kernel.org/stable/c/23569b5652ee8e8e55a12f7835f59af6f3cefc30"
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    "cveId": "CVE-2022-49853",
    "datePublished": "2025-05-01T14:10:07.726Z",
    "dateReserved": "2025-05-01T14:05:17.230Z",
    "dateUpdated": "2026-05-11T19:08:01.634Z",
    "state": "PUBLISHED"
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  "dataVersion": "5.2"
}


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