{"id":"CVE-2022-49153","summary":"wireguard: socket: free skb in send6 when ipv6 is disabled","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nwireguard: socket: free skb in send6 when ipv6 is disabled\n\nI got a memory leak report:\n\nunreferenced object 0xffff8881191fc040 (size 232):\n  comm \"kworker/u17:0\", pid 23193, jiffies 4295238848 (age 3464.870s)\n  hex dump (first 32 bytes):\n    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................\n    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................\n  backtrace:\n    [\u003cffffffff814c3ef4\u003e] slab_post_alloc_hook+0x84/0x3b0\n    [\u003cffffffff814c8977\u003e] kmem_cache_alloc_node+0x167/0x340\n    [\u003cffffffff832974fb\u003e] __alloc_skb+0x1db/0x200\n    [\u003cffffffff82612b5d\u003e] wg_socket_send_buffer_to_peer+0x3d/0xc0\n    [\u003cffffffff8260e94a\u003e] wg_packet_send_handshake_initiation+0xfa/0x110\n    [\u003cffffffff8260ec81\u003e] wg_packet_handshake_send_worker+0x21/0x30\n    [\u003cffffffff8119c558\u003e] process_one_work+0x2e8/0x770\n    [\u003cffffffff8119ca2a\u003e] worker_thread+0x4a/0x4b0\n    [\u003cffffffff811a88e0\u003e] kthread+0x120/0x160\n    [\u003cffffffff8100242f\u003e] ret_from_fork+0x1f/0x30\n\nIn function wg_socket_send_buffer_as_reply_to_skb() or wg_socket_send_\nbuffer_to_peer(), the semantics of send6() is required to free skb. But\nwhen CONFIG_IPV6 is disable, kfree_skb() is missing. This patch adds it\nto fix this bug.","modified":"2026-04-02T08:27:20.552090Z","published":"2025-02-26T01:55:18.745Z","related":["SUSE-SU-2025:1027-1","SUSE-SU-2025:1176-1","SUSE-SU-2025:1183-1","SUSE-SU-2025:1194-1","SUSE-SU-2025:1241-1","SUSE-SU-2025:1263-1"],"database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49153.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/096f9d35cac0a0c95ffafc00db84786b665a4837"},{"type":"WEB","url":"https://git.kernel.org/stable/c/0b19bcb753dbfb74710d12bb2761ec5ed706c726"},{"type":"WEB","url":"https://git.kernel.org/stable/c/402991a9771587acc2947cf6c4d689c5397f2258"},{"type":"WEB","url":"https://git.kernel.org/stable/c/bbbf962d9460194993ee1943a793a0a0af4a7fbf"},{"type":"WEB","url":"https://git.kernel.org/stable/c/ebcc492f4ba14bae54b898f1016a37b4282558d1"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49153.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2022-49153"},{"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":"e7096c131e5161fa3b8e52a650d7719d2857adfd"},{"fixed":"096f9d35cac0a0c95ffafc00db84786b665a4837"},{"fixed":"402991a9771587acc2947cf6c4d689c5397f2258"},{"fixed":"ebcc492f4ba14bae54b898f1016a37b4282558d1"},{"fixed":"0b19bcb753dbfb74710d12bb2761ec5ed706c726"},{"fixed":"bbbf962d9460194993ee1943a793a0a0af4a7fbf"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-49153.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"}]}