{"schema_version":"1.9.0","id":"CVE-2023-54243","published":"2025-12-30T12:11:31.180Z","modified":"2026-08-12T03:51:49.257580973Z","related":["SUSE-SU-2026:0350-1","SUSE-SU-2026:0369-1","SUSE-SU-2026:0411-1","SUSE-SU-2026:0473-1","SUSE-SU-2026:0474-1","SUSE-SU-2026:0496-1","SUSE-SU-2026:0617-1"],"summary":"netfilter: ebtables: fix table blob use-after-free","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: ebtables: fix table blob use-after-free\n\nWe are not allowed to return an error at this point.\nLooking at the code it looks like ret is always 0 at this\npoint, but its not.\n\nt = find_table_lock(net, repl->name, &ret, &ebt_mutex);\n\n... this can return a valid table, with ret != 0.\n\nThis bug causes update of table->private with the new\nblob, but then frees the blob right away in the caller.\n\nSyzbot report:\n\nBUG: KASAN: vmalloc-out-of-bounds in __ebt_unregister_table+0xc00/0xcd0 net/bridge/netfilter/ebtables.c:1168\nRead of size 4 at addr ffffc90005425000 by task kworker/u4:4/74\nWorkqueue: netns cleanup_net\nCall Trace:\n kasan_report+0xbf/0x1f0 mm/kasan/report.c:517\n __ebt_unregister_table+0xc00/0xcd0 net/bridge/netfilter/ebtables.c:1168\n ebt_unregister_table+0x35/0x40 net/bridge/netfilter/ebtables.c:1372\n ops_exit_list+0xb0/0x170 net/core/net_namespace.c:169\n cleanup_net+0x4ee/0xb10 net/core/net_namespace.c:613\n...\n\nip(6)tables appears to be ok (ret should be 0 at this point) but make\nthis more obvious.","affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"c58dd2dd443c26d856a168db108a0cd11c285bf3"},{"fixed":"9060abce3305ab2354c892c09d5689df51486df5"},{"fixed":"dbb3cbbf03b3c52cb390fabec357f1e4638004f5"},{"fixed":"3dd6ac973351308d4117eda32298a9f1d68764fd"},{"fixed":"cda0e0243bd3c04008fcd37a46b0269fb3c49249"},{"fixed":"e58a171d35e32e6e8c37cfe0e8a94406732a331f"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"0"},{"last_affected":"a3bc0f8ea439762aa62d40a295157410498cbea7"},{"last_affected":"8ed40c122919cd79bc3c059e5864e5e7d9d455f0"},{"last_affected":"c5e4ef499cfc78de45a4f01b8c557b5964d77c53"},{"last_affected":"f34728610b2a8c7b9864f9404f2884c17f6fca5c"},{"last_affected":"8b5740915a9faa8b1fa9166193a33e2a9ae30ec6"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"3.2.60"},{"fixed":"3.3"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"3.4.91"},{"fixed":"3.5"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"3.10.41"},{"fixed":"3.11"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"3.12.21"},{"fixed":"3.13"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"3.14.5"},{"fixed":"3.15"}]}],"versions":["v3.13","v3.2.59","v3.14.4","v3.10.40","v3.2.58","v3.4.90","v3.14","v3.12.20","v3.4.89","v3.10.39","v3.14.3","v3.14.2","v3.10.38","v3.4.88","v3.12.19","v3.14-rc4","v3.2.57","v3.14.1","v3.10.37","v3.4.87","v3.12.18","v3.14-rc8","v3.4.86","v3.10.36","v3.12.17","v3.14-rc7","v3.2.56","v3.14-rc6","v3.14-rc1","v3.14-rc2","v3.10.35","v3.4.85","v3.2.55","v3.12.16","v3.10.34","v3.4.84","v3.14-rc5","v3.12.15","v3.10.33","v3.4.83","v3.14-rc3","v3.12.14","v3.4.82","v3.10.32","v3.12.13","v3.12.12","v3.10.31","v3.4.81","v3.12.11","v3.10.30","v3.4.80","v3.2.54","v3.12.10","v3.10.29","v3.4.79","v3.13-rc6","v3.12.9","v3.10.28","v3.4.78","v3.4.77","v3.12.8","v3.10.27","v3.13-rc8","v3.12","v3.13-rc7","v3.13-rc1","v3.12.7","v3.10.26","v3.4.76","v3.13-rc4","v3.13-rc3","v3.12.6","v3.10.25","v3.4.75","v3.13-rc5","v3.2.53","v3.13-rc2","v3.12.5","v3.10.24","v3.4.74","v3.12.4","v3.10.23","v3.4.73","v3.4.72","v3.10.22","v3.12.3","v3.12.2","v3.10.21","v3.4.71","v3.12.1","v3.10.20","v3.4.70","v3.2.52","v3.10.19","v3.4.69","v3.12-rc7","v3.12-rc3","v3.12-rc6","v3.10.18","v3.4.68","v3.12-rc1","v3.12-rc5","v3.11","v3.10.17","v3.4.67","v3.12-rc2","v3.12-rc4","v3.2.51","v3.4.66","v3.10.16","v3.10.15","v3.4.65","v3.10.14","v3.4.64","v3.10.13","v3.4.63","v3.10.12","v3.4.62","v3.10.11","v3.4.61","v3.2.50","v3.11-rc7","v3.10.10","v3.4.60","v3.11-rc2","v3.11-rc5","v3.11-rc1","v3.11-rc3","v3.11-rc4","v3.4.59","v3.10.9","v3.11-rc6","v3.10.8","v3.10.7","v3.4.58","v3.10.6","v3.4.57","v3.10.5","v3.4.56","v3.10-rc2","v3.10.4","v3.4.55","v3.2.49","v3.10.3","v3.4.54","v3.2.48","v3.10.2","v3.10","v3.10.1","v3.4.53","v3.4.52","v3.4.51","v3.10-rc7","v3.2.47","v3.10-rc6","v3.10-rc1","v3.4.50","v3.10-rc5","v3.10-rc3","v3.4.49","v3.2.46","v3.10-rc4","v3.4.48","v3.4.47","v3.2.45","v3.9","v3.4.46","v3.4.45","v3.2.44","v3.4.44","v3.4.43","v3.9-rc2","v3.9-rc7","v3.4.42","v3.9-rc8","v3.4.41","v3.2.43","v3.9-rc3","v3.9-rc6","v3.9-rc5","v3.4.40","v3.4.39","v3.9-rc4","v3.9-rc1","v3.2.42","v3.8","v3.4.38","v3.4.37","v3.2.41","v3.4.36","v3.2.40","v3.4.35","v3.2.39","v3.4.34","v3.4.33","v3.8-rc7","v3.4.32","v3.8-rc6","v3.2.38","v3.8-rc5","v3.4.31","v3.4.30","v3.8-rc2","v3.4.29","v3.2.37","v3.4.28","v3.8-rc1","v3.8-rc3","v3.8-rc4","v3.4.27","v3.4.26","v3.4.25","v3.2.36","v3.7","v3.4.24","v3.2.35","v3.4.23","v3.7-rc1","v3.6","v3.7-rc6","v3.7-rc7","v3.4.22","v3.7-rc3","v3.7-rc8","v3.2.34","v3.4.21","v3.4.20","v3.7-rc2","v3.4.19","v3.7-rc4","v3.7-rc5","v3.4.18","v3.2.33","v3.4.17","v3.4.16","v3.2.32","v3.4.15","v3.4.14","v3.2.31","v3.4.13","v3.2.30","v3.6-rc7","v3.4.12","v3.6-rc1","v3.5-rc3","v3.4.11","v3.6-rc6","v3.6-rc5","v3.5","v3.6-rc3","v3.6-rc4","v3.2.29","v3.6-rc2","v3.4.10","v3.2.28","v3.4-rc4","v3.4.9","v3.2.27","v3.4.8","v3.2.26","v3.4.7","v3.2.25","v3.2.24","v3.4.6","v3.5-rc7","v3.2.23","v3.5-rc5","v3.5-rc6","v3.4.5","v3.4.4","v3.5-rc2","v3.2.22","v3.5-rc1","v3.5-rc4","v3.2.21","v3.4","v3.4.3","v3.2.20","v3.4.2","v3.2.19","v3.4.1","v3.2.18","v3.4-rc2","v3.4-rc1","v3.2.17","v3.4-rc7","v3.4-rc6","v3.4-rc3","v3.4-rc5","v3.2.16","v3.2.15","v3.3","v3.2.14","v3.2.13","v3.3-rc6","v3.3-rc3","v3.2.12","v3.3-rc7","v3.2.11","v3.3-rc2","v3.3-rc5","v3.2","v3.2.10","v3.3-rc4","v3.2.9","v3.3-rc1","v3.2.8","v3.2.7","v3.2.6","v3.2.5","v3.2.4","v3.2.3","v3.2.2","v3.2.1","v3.2-rc4","v3.2-rc7","v3.2-rc6","v3.2-rc5","v3.2-rc3","v3.1","v3.2-rc2","v3.2-rc1","v3.1-rc1","v3.1-rc9","v3.1-rc8","v3.1-rc10","v3.1-rc7","v3.1-r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