CVE-2022-49853 (GCVE-0-2022-49853)

Vulnerability from cvelistv5 – Published: 2025-05-01 14:10 – Updated: 2025-10-01 16:07
VLAI?
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)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE
  • CWE-401 - Missing Release of Memory after Effective Lifetime
Assigner
References
Impacted products
Vendor Product Version
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)
Create a notification for this product.
    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)
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\"unaffected\", \"version\": \"6.1\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"drivers/net/macvlan.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/9f288e338be206713d79b29144c27fca4503c39b\"}, {\"url\": \"https://git.kernel.org/stable/c/21d3a8b6a1e39e7529ce9de07316ee13a63f305b\"}, {\"url\": \"https://git.kernel.org/stable/c/a81b44d1df1f07f00c0dcc0a0b3d2fa24a46289e\"}, {\"url\": \"https://git.kernel.org/stable/c/685e73e3f7a9fb75cbf049a9d0b7c45cc6b57b2e\"}, {\"url\": \"https://git.kernel.org/stable/c/956e0216a19994443c90ba2ea6b0b284c9c4f9cb\"}, {\"url\": \"https://git.kernel.org/stable/c/a8d67367ab33604326cc37ab44fd1801bf5691ba\"}, {\"url\": \"https://git.kernel.org/stable/c/9ea003c4671b2fc455320ecf6d4a43b0a3c1878a\"}, {\"url\": \"https://git.kernel.org/stable/c/23569b5652ee8e8e55a12f7835f59af6f3cefc30\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"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.\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"4.9.334\", \"versionStartIncluding\": \"4.9\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"4.14.300\", \"versionStartIncluding\": \"4.9\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"4.19.267\", \"versionStartIncluding\": \"4.9\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.4.225\", \"versionStartIncluding\": \"4.9\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.155\", \"versionStartIncluding\": \"4.9\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.79\", \"versionStartIncluding\": \"4.9\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.0.9\", \"versionStartIncluding\": \"4.9\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1\", \"versionStartIncluding\": \"4.9\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2025-05-04T08:46:55.938Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2022-49853\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-10-01T16:07:29.375Z\", \"dateReserved\": \"2025-05-01T14:05:17.230Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2025-05-01T14:10:07.726Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}


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  • 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.



Detection rules are retrieved from Rulezet.