{"id":"CVE-2022-50310","aliases":["DEBIAN-CVE-2022-50310","EUVD-2022-55545","GHSA-5gwp-j3j8-5v64","UBUNTU-CVE-2022-50310"],"status":"published","title":"ip6mr: fix UAF issue in ip6mr_sk_done() when addrconf_init_net() failed","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nip6mr: fix UAF issue in ip6mr_sk_done() when addrconf_init_net() failed\n\nIf the initialization fails in calling addrconf_init_net(), devconf_all is\nthe pointer that has been released. Then ip6mr_sk_done() is called to\nrelease the net, accessing devconf-\u003emc_forwarding directly causes invalid\npointer access.\n\nThe process is as follows:\nsetup_net()\n\tops_init()\n\t\taddrconf_init_net()\n\t\tall = kmemdup(...)           ---\u003e alloc \"all\"\n\t\t...\n\t\tnet-\u003eipv6.devconf_all = all;\n\t\t__addrconf_sysctl_register() ---\u003e failed\n\t\t...\n\t\tkfree(all);                  ---\u003e ipv6.devconf_all invalid\n\t\t...\n\tops_exit_list()\n\t\t...\n\t\tip6mr_sk_done()\n\t\t\tdevconf = net-\u003eipv6.devconf_all;\n\t\t\t//devconf is invalid pointer\n\t\t\tif (!devconf || !atomic_read(\u0026devconf-\u003emc_forwarding))\n\nThe following is the Call Trace information:\nBUG: KASAN: use-after-free in ip6mr_sk_done+0x112/0x3a0\nRead of size 4 at addr ffff888075508e88 by task ip/14554\nCall Trace:\n\u003cTASK\u003e\ndump_stack_lvl+0x8e/0xd1\nprint_report+0x155/0x454\nkasan_report+0xba/0x1f0\nkasan_check_range+0x35/0x1b0\nip6mr_sk_done+0x112/0x3a0\nrawv6_close+0x48/0x70\ninet_release+0x109/0x230\ninet6_release+0x4c/0x70\nsock_release+0x87/0x1b0\nigmp6_net_exit+0x6b/0x170\nops_exit_list+0xb0/0x170\nsetup_net+0x7ac/0xbd0\ncopy_net_ns+0x2e6/0x6b0\ncreate_new_namespaces+0x382/0xa50\nunshare_nsproxy_namespaces+0xa6/0x1c0\nksys_unshare+0x3a4/0x7e0\n__x64_sys_unshare+0x2d/0x40\ndo_syscall_64+0x35/0x80\nentry_SYSCALL_64_after_hwframe+0x46/0xb0\nRIP: 0033:0x7f7963322547\n\n\u003c/TASK\u003e\nAllocated by task 14554:\nkasan_save_stack+0x1e/0x40\nkasan_set_track+0x21/0x30\n__kasan_kmalloc+0xa1/0xb0\n__kmalloc_node_track_caller+0x4a/0xb0\nkmemdup+0x28/0x60\naddrconf_init_net+0x1be/0x840\nops_init+0xa5/0x410\nsetup_net+0x5aa/0xbd0\ncopy_net_ns+0x2e6/0x6b0\ncreate_new_namespaces+0x382/0xa50\nunshare_nsproxy_namespaces+0xa6/0x1c0\nksys_unshare+0x3a4/0x7e0\n__x64_sys_unshare+0x2d/0x40\ndo_syscall_64+0x35/0x80\nentry_SYSCALL_64_after_hwframe+0x46/0xb0\n\nFreed by task 14554:\nkasan_save_stack+0x1e/0x40\nkasan_set_track+0x21/0x30\nkasan_save_free_info+0x2a/0x40\n____kasan_slab_free+0x155/0x1b0\nslab_free_freelist_hook+0x11b/0x220\n__kmem_cache_free+0xa4/0x360\naddrconf_init_net+0x623/0x840\nops_init+0xa5/0x410\nsetup_net+0x5aa/0xbd0\ncopy_net_ns+0x2e6/0x6b0\ncreate_new_namespaces+0x382/0xa50\nunshare_nsproxy_namespaces+0xa6/0x1c0\nksys_unshare+0x3a4/0x7e0\n__x64_sys_unshare+0x2d/0x40\ndo_syscall_64+0x35/0x80\nentry_SYSCALL_64_after_hwframe+0x46/0xb0","severity":{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.00157,"percentile":0.04894,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-416"],"published":"2025-09-15T14:46:05Z","modified":"2026-10-28T02:30:56Z","fixes":[{"ecosystem":"Linux","package":"Kernel","fixed_in":["6.0.6"],"sources":["osv"]},{"ecosystem":"Debian:12","package":"linux","fixed_in":["6.0.6-1"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"linux","fixed_in":["6.0.6-1"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"linux","fixed_in":["6.0.6-1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Linux","package":"Kernel","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"5.18.0"},{"fixed":"6.0.6"}]}]},{"source":"osv","ecosystem":"Debian:12","package":"linux","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.0.6-1"}]}]},{"source":"osv","ecosystem":"Debian:13","package":"linux","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.0.6-1"}]}]},{"source":"osv","ecosystem":"Debian:14","package":"linux","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.0.6-1"}]}]},{"source":"osv","ecosystem":"Ubuntu:16.04:LTS","package":"linux-hwe-edge","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.8.0-28.30~16.04.1","4.8.0-30.32~16.04.1","4.8.0-32.34~16.04.1","4.8.0-34.36~16.04.1","4.10.0-14.16~16.04.1","4.10.0-19.21~16.04.1","4.10.0-20.22~16.04.1","4.10.0-21.23~16.04.1","4.10.0-22.24~16.04.1","4.10.0-24.28~16.04.1","4.10.0-26.30~16.04.1","4.11.0-13.19~16.04.1","4.11.0-14.20~16.04.1","4.13.0-16.19~16.04.3","4.13.0-17.20~16.04.1","4.13.0-19.22~16.04.1","4.13.0-21.24~16.04.1","4.13.0-25.29~16.04.2","4.15.0-13.14~16.04.1","4.15.0-15.16~16.04.1","4.15.0-20.21~16.04.1","4.15.0-22.24~16.04.1","4.15.0-23.25~16.04.1"]},{"source":"osv","ecosystem":"Ubuntu:18.04:LTS","package":"linux-aws-5.0","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["5.0.0-1021.24~18.04.1","5.0.0-1022.25~18.04.1","5.0.0-1023.26~18.04.1","5.0.0-1024.27~18.04.1","5.0.0-1025.28","5.0.0-1027.30"]},{"source":"osv","ecosystem":"Ubuntu:18.04:LTS","package":"linux-aws-5.3","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["5.3.0-1016.17~18.04.1","5.3.0-1017.18~18.04.1","5.3.0-1019.21~18.04.1","5.3.0-1023.25~18.04.1","5.3.0-1028.30~18.04.1","5.3.0-1030.32~18.04.1","5.3.0-1032.34~18.04.2","5.3.0-1033.35","5.3.0-1034.36","5.3.0-1035.37"]},{"source":"osv","ecosystem":"Ubuntu:18.04:LTS","package":"linux-azure","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.15.0-1002.2","4.15.0-1003.3","4.15.0-1004.4","4.15.0-1008.8","4.15.0-1009.9","4.15.0-1012.12","4.15.0-1013.13","4.15.0-1014.14","4.15.0-1018.18","4.15.0-1019.19","4.15.0-1021.21","4.15.0-1022.23","4.15.0-1023.24","4.15.0-1025.26","4.15.0-1028.29","4.15.0-1030.31","4.15.0-1031.32","4.15.0-1032.33","4.15.0-1035.36","4.15.0-1036.38","4.15.0-1037.39","4.18.0-1011.11~18.04.1","4.18.0-1013.13~18.04.1","4.18.0-1014.14~18.04.1","4.18.0-1018.18~18.04.1","4.18.0-1019.19~18.04.1","4.18.0-1020.20~18.04.1","4.18.0-1023.24~18.04.1","4.18.0-1024.25~18.04.1","4.18.0-1025.27~18.04.1","5.0.0-1014.14~18.04.1","5.0.0-1016.17~18.04.1","5.0.0-1018.19~18.04.1","5.0.0-1020.21~18.04.1","5.0.0-1022.23~18.04.1","5.0.0-1023.24~18.04.1","5.0.0-1025.27~18.04.1","5.0.0-1027.29~18.04.1","5.0.0-1028.30~18.04.1","5.0.0-1029.31~18.04.1","5.0.0-1031.33","5.0.0-1032.34","5.0.0-1035.37","5.0.0-1036.38"]},{"source":"osv","ecosystem":"Ubuntu:18.04:LTS","package":"linux-azure-5.3","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["5.3.0-1007.8~18.04.1","5.3.0-1008.9~18.04.1","5.3.0-1009.10~18.04.1","5.3.0-1010.11~18.04.1","5.3.0-1012.13~18.04.1","5.3.0-1013.14~18.04.1","5.3.0-1016.17~18.04.1","5.3.0-1018.19~18.04.1","5.3.0-1019.20~18.04.1","5.3.0-1020.21~18.04.1","5.3.0-1022.23~18.04.1","5.3.0-1028.29~18.04.1","5.3.0-1031.32~18.04.1","5.3.0-1032.33~18.04.1","5.3.0-1034.35~18.04.1","5.3.0-1035.36"]},{"source":"osv","ecosystem":"Ubuntu:18.04:LTS","package":"linux-azure-edge","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.18.0-1006.6~18.04.1","4.18.0-1007.7~18.04.1","4.18.0-1008.8~18.04.1","5.0.0-1012.12~18.04.2"]},{"source":"osv","ecosystem":"Ubuntu:18.04:LTS","package":"li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fix UAF issue in ip6mr_sk_done() when addrconf_init_net() failed","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nip6mr: fix UAF issue in ip6mr_sk_done() when addrconf_init_net() failed\n\nIf the initialization fails in calling addrconf_init_net(), devconf_all is\nthe pointer that has been released. Then ip6mr_sk_done() is called to\nrelease the net, accessing devconf-\u003emc_forwarding directly causes invalid\npointer access.\n\nThe process is as follows:\nsetup_net()\n\tops_init()\n\t\taddrconf_init_net()\n\t\tall = kmemdup(...)           ---\u003e alloc \"all\"\n\t\t...\n\t\tnet-\u003eipv6.devconf_all = all;\n\t\t__addrconf_sysctl_register() ---\u003e failed\n\t\t...\n\t\tkfree(all);                  ---\u003e ipv6.devconf_all invalid\n\t\t...\n\tops_exit_list()\n\t\t...\n\t\tip6mr_sk_done()\n\t\t\tdevconf = net-\u003eipv6.devconf_all;\n\t\t\t//devconf is invalid pointer\n\t\t\tif (!devconf || !atomic_read(\u0026devconf-\u003emc_forwarding))\n\nThe following is the Call Trace information:\nBUG: KASAN: use-after-free in ip6mr_sk_done+0x112/0x3a0\nRead of size 4 at addr ffff888075508e88 by task ip/14554\nCall Trace:\n\u003cTASK\u003e\ndump_stack_lvl+0x8e/0xd1\nprint_report+0x155/0x454\nkasan_report+0xba/0x1f0\nkasan_check_range+0x35/0x1b0\nip6mr_sk_done+0x112/0x3a0\nrawv6_close+0x48/0x70\ninet_release+0x109/0x230\ninet6_release+0x4c/0x70\nsock_release+0x87/0x1b0\nigmp6_net_exit+0x6b/0x170\nops_exit_list+0xb0/0x170\nsetup_net+0x7ac/0xbd0\ncopy_net_ns+0x2e6/0x6b0\ncreate_new_namespaces+0x382/0xa50\nunshare_nsproxy_namespaces+0xa6/0x1c0\nksys_unshare+0x3a4/0x7e0\n__x64_sys_unshare+0x2d/0x40\ndo_syscall_64+0x35/0x80\nentry_SYSCALL_64_after_hwframe+0x46/0xb0\nRIP: 0033:0x7f7963322547\n\n\u003c/TASK\u003e\nAllocated by task 14554:\nkasan_save_stack+0x1e/0x40\nkasan_set_track+0x21/0x30\n__kasan_kmalloc+0xa1/0xb0\n__kmalloc_node_track_caller+0x4a/0xb0\nkmemdup+0x28/0x60\naddrconf_init_net+0x1be/0x840\nops_init+0xa5/0x410\nsetup_net+0x5aa/0xbd0\ncopy_net_ns+0x2e6/0x6b0\ncreate_new_namespaces+0x382/0xa50\nunshare_nsproxy_namespaces+0xa6/0x1c0\nksys_unshare+0x3a4/0x7e0\n__x64_sys_unshare+0x2d/0x40\ndo_syscall_64+0x35/0x80\nentry_SYSCALL_64_after_hwframe+0x46/0xb0\n\nFreed by task 14554:\nkasan_save_stack+0x1e/0x40\nkasan_set_track+0x21/0x30\nkasan_save_free_info+0x2a/0x40\n____kasan_slab_free+0x155/0x1b0\nslab_free_freelist_hook+0x11b/0x220\n__kmem_cache_free+0xa4/0x360\naddrconf_init_net+0x623/0x840\nops_init+0xa5/0x410\nsetup_net+0x5aa/0xbd0\ncopy_net_ns+0x2e6/0x6b0\ncreate_new_namespaces+0x382/0xa50\nunshare_nsproxy_namespaces+0xa6/0x1c0\nksys_unshare+0x3a4/0x7e0\n__x64_sys_unshare+0x2d/0x40\ndo_syscall_64+0x35/0x80\nentry_SYSCALL_64_after_hwframe+0x46/0xb0","status":"published","published":"2025-09-15T14:46:05.486Z","modified":"2026-08-05T08:58:08.862Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"cna"}],"updated_at":"2026-11-02T14:34:40.982917Z"}],"euvd":[{"id":"EUVD-2022-55545","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nip6mr: fix UAF issue in ip6mr_sk_done() when addrconf_init_net() failed\n\nIf the initialization fails in calling addrconf_init_net(), devconf_all is\nthe pointer that has been released. Then ip6mr_sk_done() is called to\nrelease the net, accessing devconf-\u003emc_forwarding directly causes invalid\npointer access.\n\nThe process is as follows:\nsetup_net()\n\tops_init()\n\t\taddrconf_init_net()\n\t\tall = kmemdup(...)           ---\u003e alloc \"all\"\n\t\t...\n\t\tnet-\u003eipv6.devconf_all = all;\n\t\t__addrconf_sysctl_register() ---\u003e failed\n\t\t...\n\t\tkfree(all);                  ---\u003e ipv6.devconf_all invalid\n\t\t...\n\tops_exit_list()\n\t\t...\n\t\tip6mr_sk_done()\n\t\t\tdevconf = net-\u003eipv6.devconf_all;\n\t\t\t//devconf is invalid pointer\n\t\t\tif (!devconf || !atomic_read(\u0026devconf-\u003emc_forwarding))\n\nThe following is the Call Trace information:\nBUG: KASAN: use-after-free in ip6mr_sk_done+0x112/0x3a0\nRead of size 4 at addr ffff888075508e88 by task ip/14554\nCall Trace:\n\u003cTASK\u003e\ndump_stack_lvl+0x8e/0xd1\nprint_report+0x155/0x454\nkasan_report+0xba/0x1f0\nkasan_check_range+0x35/0x1b0\nip6mr_sk_done+0x112/0x3a0\nrawv6_close+0x48/0x70\ninet_release+0x109/0x230\ninet6_release+0x4c/0x70\nsock_release+0x87/0x1b0\nigmp6_net_exit+0x6b/0x170\nops_exit_list+0xb0/0x170\nsetup_net+0x7ac/0xbd0\ncopy_net_ns+0x2e6/0x6b0\ncreate_new_namespaces+0x382/0xa50\nunshare_nsproxy_namespaces+0xa6/0x1c0\nksys_unshare+0x3a4/0x7e0\n__x64_sys_unshare+0x2d/0x40\ndo_syscall_64+0x35/0x80\nentry_SYSCALL_64_after_hwframe+0x46/0xb0\nRIP: 0033:0x7f7963322547\n\n\u003c/TASK\u003e\nAllocated by task 14554:\nkasan_save_stack+0x1e/0x40\nkasan_set_track+0x21/0x30\n__kasan_kmalloc+0xa1/0xb0\n__kmalloc_node_track_caller+0x4a/0xb0\nkmemdup+0x28/0x60\naddrconf_init_net+0x1be/0x840\nops_init+0xa5/0x410\nsetup_net+0x5aa/0xbd0\ncopy_net_ns+0x2e6/0x6b0\ncreate_new_namespaces+0x382/0xa50\nunshare_nsproxy_namespaces+0xa6/0x1c0\nksys_unshare+0x3a4/0x7e0\n__x64_sys_unshare+0x2d/0x40\ndo_syscall_64+0x35/0x80\nentry_SYSCALL_64_after_hwframe+0x46/0xb0\n\nFreed by task 14554:\nkasan_save_stack+0x1e/0x40\nkasan_set_track+0x21/0x30\nkasan_save_free_info+0x2a/0x40\n____kasan_slab_free+0x155/0x1b0\nslab_free_freelist_hook+0x11b/0x220\n__kmem_cache_free+0xa4/0x360\naddrconf_init_net+0x623/0x840\nops_init+0xa5/0x410\nsetup_net+0x5aa/0xbd0\ncopy_net_ns+0x2e6/0x6b0\ncreate_new_namespaces+0x382/0xa50\nunshare_nsproxy_namespaces+0xa6/0x1c0\nksys_unshare+0x3a4/0x7e0\n__x64_sys_unshare+0x2d/0x40\ndo_syscall_64+0x35/0x80\nentry_SYSCALL_64_after_hwframe+0x46/0xb0","status":"published","published":"2025-09-15T14:46:05Z","modified":"2026-08-05T08:58:08Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T18:02:20.151915Z"}],"ghsa":[{"id":"GHSA-5gwp-j3j8-5v64","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nip6mr: fix UAF issue in...","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nip6mr: fix UAF issue in ip6mr_sk_done() when addrconf_init_net() failed\n\nIf the initialization fails in calling addrconf_init_net(), devconf_all is\nthe pointer that has been released. Then ip6mr_sk_done() is called to\nrelease the net, accessing devconf-\u003emc_forwarding directly causes invalid\npointer access.\n\nThe process is as follows:\nsetup_net()\n\tops_init()\n\t\taddrconf_init_net()\n\t\tall = kmemdup(...)           ---\u003e alloc \"all\"\n\t\t...\n\t\tnet-\u003eipv6.devconf_all = all;\n\t\t__addrconf_sysctl_register() ---\u003e failed\n\t\t...\n\t\tkfree(all);                  ---\u003e ipv6.devconf_all invalid\n\t\t...\n\tops_exit_list()\n\t\t...\n\t\tip6mr_sk_done()\n\t\t\tdevconf = net-\u003eipv6.devconf_all;\n\t\t\t//devconf is invalid pointer\n\t\t\tif (!devconf || !atomic_read(\u0026devconf-\u003emc_forwarding))\n\nThe following is the Call Trace information:\nBUG: KASAN: use-after-free in ip6mr_sk_done+0x112/0x3a0\nRead of size 4 at addr ffff888075508e88 by task ip/14554\nCall Trace:\n\u003cTASK\u003e\ndump_stack_lvl+0x8e/0xd1\nprint_report+0x155/0x454\nkasan_report+0xba/0x1f0\nkasan_check_range+0x35/0x1b0\nip6mr_sk_done+0x112/0x3a0\nrawv6_close+0x48/0x70\ninet_release+0x109/0x230\ninet6_release+0x4c/0x70\nsock_release+0x87/0x1b0\nigmp6_net_exit+0x6b/0x170\nops_exit_list+0xb0/0x170\nsetup_net+0x7ac/0xbd0\ncopy_net_ns+0x2e6/0x6b0\ncreate_new_namespaces+0x382/0xa50\nunshare_nsproxy_namespaces+0xa6/0x1c0\nksys_unshare+0x3a4/0x7e0\n__x64_sys_unshare+0x2d/0x40\ndo_syscall_64+0x35/0x80\nentry_SYSCALL_64_after_hwframe+0x46/0xb0\nRIP: 0033:0x7f7963322547\n\n\u003c/TASK\u003e\nAllocated by task 14554:\nkasan_save_stack+0x1e/0x40\nkasan_set_track+0x21/0x30\n__kasan_kmalloc+0xa1/0xb0\n__kmalloc_node_track_caller+0x4a/0xb0\nkmemdup+0x28/0x60\naddrconf_init_net+0x1be/0x840\nops_init+0xa5/0x410\nsetup_net+0x5aa/0xbd0\ncopy_net_ns+0x2e6/0x6b0\ncreate_new_namespaces+0x382/0xa50\nunshare_nsproxy_namespaces+0xa6/0x1c0\nksys_unshare+0x3a4/0x7e0\n__x64_sys_unshare+0x2d/0x40\ndo_syscall_64+0x35/0x80\nentry_SYSCALL_64_after_hwframe+0x46/0xb0\n\nFreed by task 14554:\nkasan_save_stack+0x1e/0x40\nkasan_set_track+0x21/0x30\nkasan_save_free_info+0x2a/0x40\n____kasan_slab_free+0x155/0x1b0\nslab_free_freelist_hook+0x11b/0x220\n__kmem_cache_free+0xa4/0x360\naddrconf_init_net+0x623/0x840\nops_init+0xa5/0x410\nsetup_net+0x5aa/0xbd0\ncopy_net_ns+0x2e6/0x6b0\ncreate_new_namespaces+0x382/0xa50\nunshare_nsproxy_namespaces+0xa6/0x1c0\nksys_unshare+0x3a4/0x7e0\n__x64_sys_unshare+0x2d/0x40\ndo_syscall_64+0x35/0x80\nentry_SYSCALL_64_after_hwframe+0x46/0xb0","status":"published","published":"2025-09-15T15:31:27Z","modified":"2025-12-04T15:30:31Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-416"],"updated_at":"2026-11-02T15:05:02.442862Z"}],"nvd":[{"id":"CVE-2022-50310","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nip6mr: fix UAF issue in ip6mr_sk_done() when addrconf_init_net() failed\n\nIf the initialization fails in calling addrconf_init_net(), devconf_all is\nthe pointer that has been released. Then ip6mr_sk_done() is called to\nrelease the net, accessing devconf-\u003emc_forwarding directly causes invalid\npointer access.\n\nThe process is as follows:\nsetup_net()\n\tops_init()\n\t\taddrconf_init_net()\n\t\tall = kmemdup(...)           ---\u003e alloc \"all\"\n\t\t...\n\t\tnet-\u003eipv6.devconf_all = all;\n\t\t__addrconf_sysctl_register() ---\u003e failed\n\t\t...\n\t\tkfree(all);                  ---\u003e ipv6.devconf_all invalid\n\t\t...\n\tops_exit_list()\n\t\t...\n\t\tip6mr_sk_done()\n\t\t\tdevconf = net-\u003eipv6.devconf_all;\n\t\t\t//devconf is invalid pointer\n\t\t\tif (!devconf || !atomic_read(\u0026devconf-\u003emc_forwarding))\n\nThe following is the Call Trace information:\nBUG: KASAN: use-after-free in ip6mr_sk_done+0x112/0x3a0\nRead of size 4 at addr ffff888075508e88 by task ip/14554\nCall Trace:\n\u003cTASK\u003e\ndump_stack_lvl+0x8e/0xd1\nprint_report+0x155/0x454\nkasan_report+0xba/0x1f0\nkasan_check_range+0x35/0x1b0\nip6mr_sk_done+0x112/0x3a0\nrawv6_close+0x48/0x70\ninet_release+0x109/0x230\ninet6_release+0x4c/0x70\nsock_release+0x87/0x1b0\nigmp6_net_exit+0x6b/0x170\nops_exit_list+0xb0/0x170\nsetup_net+0x7ac/0xbd0\ncopy_net_ns+0x2e6/0x6b0\ncreate_new_namespaces+0x382/0xa50\nunshare_nsproxy_namespaces+0xa6/0x1c0\nksys_unshare+0x3a4/0x7e0\n__x64_sys_unshare+0x2d/0x40\ndo_syscall_64+0x35/0x80\nentry_SYSCALL_64_after_hwframe+0x46/0xb0\nRIP: 0033:0x7f7963322547\n\n\u003c/TASK\u003e\nAllocated by task 14554:\nkasan_save_stack+0x1e/0x40\nkasan_set_track+0x21/0x30\n__kasan_kmalloc+0xa1/0xb0\n__kmalloc_node_track_caller+0x4a/0xb0\nkmemdup+0x28/0x60\naddrconf_init_net+0x1be/0x840\nops_init+0xa5/0x410\nsetup_net+0x5aa/0xbd0\ncopy_net_ns+0x2e6/0x6b0\ncreate_new_namespaces+0x382/0xa50\nunshare_nsproxy_namespaces+0xa6/0x1c0\nksys_unshare+0x3a4/0x7e0\n__x64_sys_unshare+0x2d/0x40\ndo_syscall_64+0x35/0x80\nentry_SYSCALL_64_after_hwframe+0x46/0xb0\n\nFreed by task 14554:\nkasan_save_stack+0x1e/0x40\nkasan_set_track+0x21/0x30\nkasan_save_free_info+0x2a/0x40\n____kasan_slab_free+0x155/0x1b0\nslab_free_freelist_hook+0x11b/0x220\n__kmem_cache_free+0xa4/0x360\naddrconf_init_net+0x623/0x840\nops_init+0xa5/0x410\nsetup_net+0x5aa/0xbd0\ncopy_net_ns+0x2e6/0x6b0\ncreate_new_namespaces+0x382/0xa50\nunshare_nsproxy_namespaces+0xa6/0x1c0\nksys_unshare+0x3a4/0x7e0\n__x64_sys_unshare+0x2d/0x40\ndo_syscall_64+0x35/0x80\nentry_SYSCALL_64_after_hwframe+0x46/0xb0","status":"published","published":"2025-09-15T15:15:42.75Z","modified":"2026-08-04T10:18:10.67Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"secondary"},{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"primary"}],"cwes":["CWE-416"],"updated_at":"2026-11-02T14:07:43.071398Z"}],"osv":[{"id":"CVE-2022-50310","title":"ip6mr: fix UAF issue in ip6mr_sk_done() when addrconf_init_net() failed","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nip6mr: fix UAF issue in ip6mr_sk_done() when addrconf_init_net() failed\n\nIf the initialization fails in calling addrconf_init_net(), devconf_all is\nthe pointer that has been released. Then ip6mr_sk_done() is called to\nrelease the net, accessing devconf-\u003emc_forwarding directly causes invalid\npointer access.\n\nThe process is as follows:\nsetup_net()\n\tops_init()\n\t\taddrconf_init_net()\n\t\tall = kmemdup(...)           ---\u003e alloc \"all\"\n\t\t...\n\t\tnet-\u003eipv6.devconf_all = all;\n\t\t__addrconf_sysctl_register() ---\u003e failed\n\t\t...\n\t\tkfree(all);                  ---\u003e ipv6.devconf_all invalid\n\t\t...\n\tops_exit_list()\n\t\t...\n\t\tip6mr_sk_done()\n\t\t\tdevconf = net-\u003eipv6.devconf_all;\n\t\t\t//devconf is invalid pointer\n\t\t\tif (!devconf || !atomic_read(\u0026devconf-\u003emc_forwarding))\n\nThe following is the Call Trace information:\nBUG: KASAN: use-after-free in ip6mr_sk_done+0x112/0x3a0\nRead of size 4 at addr ffff888075508e88 by task ip/14554\nCall Trace:\n\u003cTASK\u003e\ndump_stack_lvl+0x8e/0xd1\nprint_report+0x155/0x454\nkasan_report+0xba/0x1f0\nkasan_check_range+0x35/0x1b0\nip6mr_sk_done+0x112/0x3a0\nrawv6_close+0x48/0x70\ninet_release+0x109/0x230\ninet6_release+0x4c/0x70\nsock_release+0x87/0x1b0\nigmp6_net_exit+0x6b/0x170\nops_exit_list+0xb0/0x170\nsetup_net+0x7ac/0xbd0\ncopy_net_ns+0x2e6/0x6b0\ncreate_new_namespaces+0x382/0xa50\nunshare_nsproxy_namespaces+0xa6/0x1c0\nksys_unshare+0x3a4/0x7e0\n__x64_sys_unshare+0x2d/0x40\ndo_syscall_64+0x35/0x80\nentry_SYSCALL_64_after_hwframe+0x46/0xb0\nRIP: 0033:0x7f7963322547\n\n\u003c/TASK\u003e\nAllocated by task 14554:\nkasan_save_stack+0x1e/0x40\nkasan_set_track+0x21/0x30\n__kasan_kmalloc+0xa1/0xb0\n__kmalloc_node_track_caller+0x4a/0xb0\nkmemdup+0x28/0x60\naddrconf_init_net+0x1be/0x840\nops_init+0xa5/0x410\nsetup_net+0x5aa/0xbd0\ncopy_net_ns+0x2e6/0x6b0\ncreate_new_namespaces+0x382/0xa50\nunshare_nsproxy_namespaces+0xa6/0x1c0\nksys_unshare+0x3a4/0x7e0\n__x64_sys_unshare+0x2d/0x40\ndo_syscall_64+0x35/0x80\nentry_SYSCALL_64_after_hwframe+0x46/0xb0\n\nFreed by task 14554:\nkasan_save_stack+0x1e/0x40\nkasan_set_track+0x21/0x30\nkasan_save_free_info+0x2a/0x40\n____kasan_slab_free+0x155/0x1b0\nslab_free_freelist_hook+0x11b/0x220\n__kmem_cache_free+0xa4/0x360\naddrconf_init_net+0x623/0x840\nops_init+0xa5/0x410\nsetup_net+0x5aa/0xbd0\ncopy_net_ns+0x2e6/0x6b0\ncreate_new_namespaces+0x382/0xa50\nunshare_nsproxy_namespaces+0xa6/0x1c0\nksys_unshare+0x3a4/0x7e0\n__x64_sys_unshare+0x2d/0x40\ndo_syscall_64+0x35/0x80\nentry_SYSCALL_64_after_hwframe+0x46/0xb0","status":"published","published":"2025-09-15T14:46:05.486Z","modified":"2026-10-28T02:30:56.123300315Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:44:28.74679Z"},{"id":"UBUNTU-CVE-2022-50310","description":"In the Linux kernel, the following vulnerability has been resolved: ip6mr: fix UAF issue in ip6mr_sk_done() when addrconf_init_net() failed If the initialization fails in calling addrconf_init_net(), devconf_all is the pointer that has been released. Then ip6mr_sk_done() is called to release the net, accessing devconf-\u003emc_forwarding directly causes invalid pointer access. The process is as follows: setup_net() \tops_init() \t\taddrconf_init_net() \t\tall = kmemdup(...)           ---\u003e alloc \"all\" \t\t... \t\tnet-\u003eipv6.devconf_all = all; \t\t__addrconf_sysctl_register() ---\u003e failed \t\t... \t\tkfree(all);                  ---\u003e ipv6.devconf_all invalid \t\t... \tops_exit_list() \t\t... \t\tip6mr_sk_done() \t\t\tdevconf = net-\u003eipv6.devconf_all; \t\t\t//devconf is invalid pointer \t\t\tif (!devconf || !atomic_read(\u0026devconf-\u003emc_forwarding)) The following is the Call Trace information: BUG: KASAN: use-after-free in ip6mr_sk_done+0x112/0x3a0 Read of size 4 at addr ffff888075508e88 by task ip/14554 Call Trace: \u003cTASK\u003e dump_stack_lvl+0x8e/0xd1 print_report+0x155/0x454 kasan_report+0xba/0x1f0 kasan_check_range+0x35/0x1b0 ip6mr_sk_done+0x112/0x3a0 rawv6_close+0x48/0x70 inet_release+0x109/0x230 inet6_release+0x4c/0x70 sock_release+0x87/0x1b0 igmp6_net_exit+0x6b/0x170 ops_exit_list+0xb0/0x170 setup_net+0x7ac/0xbd0 copy_net_ns+0x2e6/0x6b0 create_new_namespaces+0x382/0xa50 unshare_nsproxy_namespaces+0xa6/0x1c0 ksys_unshare+0x3a4/0x7e0 __x64_sys_unshare+0x2d/0x40 do_syscall_64+0x35/0x80 entry_SYSCALL_64_after_hwframe+0x46/0xb0 RIP: 0033:0x7f7963322547 \u003c/TASK\u003e Allocated by task 14554: kasan_save_stack+0x1e/0x40 kasan_set_track+0x21/0x30 __kasan_kmalloc+0xa1/0xb0 __kmalloc_node_track_caller+0x4a/0xb0 kmemdup+0x28/0x60 addrconf_init_net+0x1be/0x840 ops_init+0xa5/0x410 setup_net+0x5aa/0xbd0 copy_net_ns+0x2e6/0x6b0 create_new_namespaces+0x382/0xa50 unshare_nsproxy_namespaces+0xa6/0x1c0 ksys_unshare+0x3a4/0x7e0 __x64_sys_unshare+0x2d/0x40 do_syscall_64+0x35/0x80 entry_SYSCALL_64_after_hwframe+0x46/0xb0 Freed by task 14554: kasan_save_stack+0x1e/0x40 kasan_set_track+0x21/0x30 kasan_save_free_info+0x2a/0x40 ____kasan_slab_free+0x155/0x1b0 slab_free_freelist_hook+0x11b/0x220 __kmem_cache_free+0xa4/0x360 addrconf_init_net+0x623/0x840 ops_init+0xa5/0x410 setup_net+0x5aa/0xbd0 copy_net_ns+0x2e6/0x6b0 create_new_namespaces+0x382/0xa50 unshare_nsproxy_namespaces+0xa6/0x1c0 ksys_unshare+0x3a4/0x7e0 __x64_sys_unshare+0x2d/0x40 do_syscall_64+0x35/0x80 entry_SYSCALL_64_after_hwframe+0x46/0xb0","status":"published","published":"2025-09-15T15:15:00Z","modified":"2026-08-06T03:07:13.522231845Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"},{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T16:54:14.479882Z"},{"id":"DEBIAN-CVE-2022-50310","description":"In the Linux kernel, the following vulnerability has been resolved:  ip6mr: fix UAF issue in ip6mr_sk_done() when addrconf_init_net() failed  If the initialization fails in calling addrconf_init_net(), devconf_all is the pointer that has been released. Then ip6mr_sk_done() is called to release the net, accessing devconf-\u003emc_forwarding directly causes invalid pointer access.  The process is as follows: setup_net() \tops_init() \t\taddrconf_init_net() \t\tall = kmemdup(...)           ---\u003e alloc \"all\" \t\t... \t\tnet-\u003eipv6.devconf_all = all; \t\t__addrconf_sysctl_register() ---\u003e failed \t\t... \t\tkfree(all);                  ---\u003e ipv6.devconf_all invalid \t\t... \tops_exit_list() \t\t... \t\tip6mr_sk_done() \t\t\tdevconf = net-\u003eipv6.devconf_all; \t\t\t//devconf is invalid pointer \t\t\tif (!devconf || !atomic_read(\u0026devconf-\u003emc_forwarding))  The following is the Call Trace information: BUG: KASAN: use-after-free in ip6mr_sk_done+0x112/0x3a0 Read of size 4 at addr ffff888075508e88 by task ip/14554 Call Trace: \u003cTASK\u003e dump_stack_lvl+0x8e/0xd1 print_report+0x155/0x454 kasan_report+0xba/0x1f0 kasan_check_range+0x35/0x1b0 ip6mr_sk_done+0x112/0x3a0 rawv6_close+0x48/0x70 inet_release+0x109/0x230 inet6_release+0x4c/0x70 sock_release+0x87/0x1b0 igmp6_net_exit+0x6b/0x170 ops_exit_list+0xb0/0x170 setup_net+0x7ac/0xbd0 copy_net_ns+0x2e6/0x6b0 create_new_namespaces+0x382/0xa50 unshare_nsproxy_namespaces+0xa6/0x1c0 ksys_unshare+0x3a4/0x7e0 __x64_sys_unshare+0x2d/0x40 do_syscall_64+0x35/0x80 entry_SYSCALL_64_after_hwframe+0x46/0xb0 RIP: 0033:0x7f7963322547  \u003c/TASK\u003e Allocated by task 14554: kasan_save_stack+0x1e/0x40 kasan_set_track+0x21/0x30 __kasan_kmalloc+0xa1/0xb0 __kmalloc_node_track_caller+0x4a/0xb0 kmemdup+0x28/0x60 addrconf_init_net+0x1be/0x840 ops_init+0xa5/0x410 setup_net+0x5aa/0xbd0 copy_net_ns+0x2e6/0x6b0 create_new_namespaces+0x382/0xa50 unshare_nsproxy_namespaces+0xa6/0x1c0 ksys_unshare+0x3a4/0x7e0 __x64_sys_unshare+0x2d/0x40 do_syscall_64+0x35/0x80 entry_SYSCALL_64_after_hwframe+0x46/0xb0  Freed by task 14554: kasan_save_stack+0x1e/0x40 kasan_set_track+0x21/0x30 kasan_save_free_info+0x2a/0x40 ____kasan_slab_free+0x155/0x1b0 slab_free_freelist_hook+0x11b/0x220 __kmem_cache_free+0xa4/0x360 addrconf_init_net+0x623/0x840 ops_init+0xa5/0x410 setup_net+0x5aa/0xbd0 copy_net_ns+0x2e6/0x6b0 create_new_namespaces+0x382/0xa50 unshare_nsproxy_namespaces+0xa6/0x1c0 ksys_unshare+0x3a4/0x7e0 __x64_sys_unshare+0x2d/0x40 do_syscall_64+0x35/0x80 entry_SYSCALL_64_after_hwframe+0x46/0xb0","status":"published","published":"2025-09-15T15:15:42.75Z","modified":"2026-11-03T06:03:09.080311617Z","updated_at":"2026-11-03T06:42:33.899035Z"}]}}