{"id":"CVE-2022-49853","summary":"net: macvlan: fix memory leaks of macvlan_common_newlink","details":"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 'source',\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.","modified":"2026-04-03T13:14:22.428628989Z","published":"2025-05-01T14:10:07.726Z","related":["SUSE-SU-2025:01918-1","SUSE-SU-2025:01966-1","SUSE-SU-2025:01983-1","SUSE-SU-2025:02173-1","SUSE-SU-2025:02262-1"],"database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49853.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/21d3a8b6a1e39e7529ce9de07316ee13a63f305b"},{"type":"WEB","url":"https://git.kernel.org/stable/c/23569b5652ee8e8e55a12f7835f59af6f3cefc30"},{"type":"WEB","url":"https://git.kernel.org/stable/c/685e73e3f7a9fb75cbf049a9d0b7c45cc6b57b2e"},{"type":"WEB","url":"https://git.kernel.org/stable/c/956e0216a19994443c90ba2ea6b0b284c9c4f9cb"},{"type":"WEB","url":"https://git.kernel.org/stable/c/9ea003c4671b2fc455320ecf6d4a43b0a3c1878a"},{"type":"WEB","url":"https://git.kernel.org/stable/c/9f288e338be206713d79b29144c27fca4503c39b"},{"type":"WEB","url":"https://git.kernel.org/stable/c/a81b44d1df1f07f00c0dcc0a0b3d2fa24a46289e"},{"type":"WEB","url":"https://git.kernel.org/stable/c/a8d67367ab33604326cc37ab44fd1801bf5691ba"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49853.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2022-49853"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"aa5fd0fb77486b8a6764ead8627baa14790e4280"},{"fixed":"9f288e338be206713d79b29144c27fca4503c39b"},{"fixed":"21d3a8b6a1e39e7529ce9de07316ee13a63f305b"},{"fixed":"a81b44d1df1f07f00c0dcc0a0b3d2fa24a46289e"},{"fixed":"685e73e3f7a9fb75cbf049a9d0b7c45cc6b57b2e"},{"fixed":"956e0216a19994443c90ba2ea6b0b284c9c4f9cb"},{"fixed":"a8d67367ab33604326cc37ab44fd1801bf5691ba"},{"fixed":"9ea003c4671b2fc455320ecf6d4a43b0a3c1878a"},{"fixed":"23569b5652ee8e8e55a12f7835f59af6f3cefc30"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2022-49853.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"}]}