{"id":"CVE-2022-50780","revision":null,"records":[{"revision":"785e71be89f3478a8fe51bcc19d82aac","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2022-50780","aliases":[],"title":"net: fix UAF issue in nfqnl_nf_hook_drop() when ops_init() failed","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: fix UAF issue in nfqnl_nf_hook_drop() when ops_init() failed\n\nWhen the ops_init() interface is invoked to initialize the net, but\nops->init() fails, data is released. However, the ptr pointer in\nnet->gen is invalid. In this case, when nfqnl_nf_hook_drop() is invoked\nto release the net, invalid address access occurs.\n\nThe process is as follows:\nsetup_net()\n\tops_init()\n\t\tdata = kzalloc(...) ---> alloc \"data\"\n\t\tnet_assign_generic() ---> assign \"date\" to ptr in net->gen\n\t\t...\n\t\tops->init() ---> failed\n\t\t...\n\t\tkfree(data); ---> ptr in net->gen is invalid\n\t...\n\tops_exit_list()\n\t\t...\n\t\tnfqnl_nf_hook_drop()\n\t\t\t*q = nfnl_queue_pernet(net) ---> q is invalid\n\nThe following is the Call Trace information:\nBUG: KASAN: use-after-free in nfqnl_nf_hook_drop+0x264/0x280\nRead of size 8 at addr ffff88810396b240 by task ip/15855\nCall Trace:\n\ndump_stack_lvl+0x8e/0xd1\nprint_report+0x155/0x454\nkasan_report+0xba/0x1f0\nnfqnl_nf_hook_drop+0x264/0x280\nnf_queue_nf_hook_drop+0x8b/0x1b0\n__nf_unregister_net_hook+0x1ae/0x5a0\nnf_unregister_net_hooks+0xde/0x130\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\n\n\nAllocated by task 15855:\nkasan_save_stack+0x1e/0x40\nkasan_set_track+0x21/0x30\n__kasan_kmalloc+0xa1/0xb0\n__kmalloc+0x49/0xb0\nops_init+0xe7/0x410\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 15855:\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\nops_init+0xb9/0x410\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","state":0,"publishedAt":"2025-12-24T13:06:08.552+00:00","modifiedAt":"2026-10-15T21:41:24.033+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n \"product\": \"Linux\",\n \"vendor\": \"Linux\",\n \"defaultStatus\": \"unaffected\",\n \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n \"programFiles\": [\n \"net/core/net_namespace.c\"\n ],\n \"versions\": [\n {\n \"version\": \"f875bae065334907796da12523f9df85c89f5712\",\n \"lessThan\": \"5a2ea549be94924364f6911227d99be86e8cf34a\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"f875bae065334907796da12523f9df85c89f5712\",\n \"lessThan\": \"97ad240fd9aa9214497d14af2b91608e20856cac\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"f875bae065334907796da12523f9df85c89f5712\",\n \"lessThan\": \"c3edc6e808209aa705185f732e682a370981ced1\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"f875bae065334907796da12523f9df85c89f5712\",\n \"lessThan\": \"a1e18acb0246bfb001b08b8b1b830b5ec92a0f13\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"f875bae065334907796da12523f9df85c89f5712\",\n \"lessThan\": \"4a4df5e78712de39d6f90d6a64b5eb48dca03bd5\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"f875bae065334907796da12523f9df85c89f5712\",\n \"lessThan\": \"d266935ac43d57586e311a087510fe6a084af742\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n }\n ]\n }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n \"product\": \"Linux\",\n \"vendor\": \"Linux\",\n \"defaultStatus\": \"affected\",\n \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n \"programFiles\": [\n \"net/core/net_namespace.c\"\n ],\n \"versions\": [\n {\n \"version\": \"2.6.33\",\n \"status\": \"affected\"\n },\n {\n \"version\": \"0\",\n \"lessThan\": \"2.6.33\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"4.19.264\",\n \"lessThanOrEqual\": \"4.19.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"5.4.223\",\n \"lessThanOrEqual\": \"5.4.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"5.10.153\",\n \"lessThanOrEqual\": \"5.10.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"5.15.77\",\n \"lessThanOrEqual\": \"5.15.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.0.7\",\n \"lessThanOrEqual\": \"6.0.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.1\",\n \"lessThanOrEqual\": \"*\",\n \"status\": \"unaffected\",\n \"versionType\": \"original_commit_for_fix\"\n }\n ]\n }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":7.8,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/5a2ea549be94924364f6911227d99be86e8cf34a","https://git.kernel.org/stable/c/97ad240fd9aa9214497d14af2b91608e20856cac","https://git.kernel.org/stable/c/c3edc6e808209aa705185f732e682a370981ced1","https://git.kernel.org/stable/c/a1e18acb0246bfb001b08b8b1b830b5ec92a0f13","https://git.kernel.org/stable/c/4a4df5e78712de39d6f90d6a64b5eb48dca03bd5","https://git.kernel.org/stable/c/d266935ac43d57586e311a087510fe6a084af742"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2022-50780","license":"CVE Program Terms of Use","key":"cve-program:CVE-2022-50780","identifiers":["CVE-2022-50780"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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Not a global EUVD catalog. Successful not-found lookups count as checked; they do not imply withdrawal or safety. No reader inventory is sent.","generation":"enrichment-897f1f8852214f7d97a85b009edb7d92","complete":false,"records":13655,"lastAttemptAt":"2026-11-09T13:16:47.5163098+00:00","lastSuccessAt":"2026-11-09T13:16:47.505+00:00","error":"7 identifier lookups failed; latest failures include HTTP 403. Other identifiers were checked independently.","lastVerifiedAt":"2026-11-09T13:16:47.505+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":13700,"expectedIdentifiers":13707,"failedIdentifiers":7},{"source":"first-epss:nuget","scope":"FIRST EPSS for explicit CVE aliases in the collected public NuGet archive. Not a global EPSS backfill.","generation":"2026-11-09T13:04:36.1502744+00:00","complete":true,"records":1096,"lastAttemptAt":"2026-11-09T13:04:36.1502744+00:00","lastSuccessAt":"2026-11-09T13:04:36.3096956+00:00","error":null,"lastVerifiedAt":"2026-11-09T13:04:36.3096959+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"nvd","scope":"Rolling NVD lookups of CVE aliases in current public OSV archives; 500 identifiers per refresh, rechecked after 48 hours. Not a global NVD catalog. Successful not-found lookups count as checked; they do not imply withdrawal or safety. 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