{ "schemaVersion": 1, "attribution": [ { "source": "CISA Known Exploited Vulnerabilities", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog", "licence": "US government work" }, { "source": "GitHub Advisory Database", "url": "https://github.com/advisories", "licence": "CC BY 4.0" }, { "source": "Have I Been Pwned", "url": "https://haveibeenpwned.com/", "licence": "CC BY 4.0" }, { "source": "CVE Program (CVE records)", "url": "https://www.cve.org/Legal/TermsOfUse", "licence": "CVE Terms of Use", "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.", "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy." }, { "source": "FIRST EPSS", "url": "https://www.first.org/epss/", "licence": "free to use; FIRST requests attribution" } ], "record": { "id": "CVE-2022-50780", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2022-50780", "idYear": 2022, "status": "PUBLISHED", "publishedAt": "2025-12-24T13:06:08.552Z", "updatedAt": "2026-10-15T21:41:24.033Z", "importedAt": "2026-10-24T01:56:49.724Z", "snapshot": { "id": "cve_2026-10-24_midnight_baseline", "at": "2026-10-24T00:00:00.000Z", "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z" }, "facts": { "title": "net: fix UAF issue in nfqnl_nf_hook_drop() when ops_init() failed", "summary": "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", "affected": [ { "vendor": "Linux", "product": "Linux", "defaultStatus": "unaffected", "versions": [ { "version": "f875bae065334907796da12523f9df85c89f5712", "status": "affected", "versionType": "git", "lessThan": "5a2ea549be94924364f6911227d99be86e8cf34a" }, { "version": "f875bae065334907796da12523f9df85c89f5712", "status": "affected", "versionType": "git", "lessThan": "97ad240fd9aa9214497d14af2b91608e20856cac" }, { "version": "f875bae065334907796da12523f9df85c89f5712", "status": "affected", "versionType": "git", "lessThan": "c3edc6e808209aa705185f732e682a370981ced1" }, { "version": "f875bae065334907796da12523f9df85c89f5712", "status": "affected", "versionType": "git", "lessThan": "a1e18acb0246bfb001b08b8b1b830b5ec92a0f13" }, { "version": "f875bae065334907796da12523f9df85c89f5712", "status": "affected", "versionType": "git", "lessThan": "4a4df5e78712de39d6f90d6a64b5eb48dca03bd5" }, { "version": "f875bae065334907796da12523f9df85c89f5712", "status": "affected", "versionType": "git", "lessThan": "d266935ac43d57586e311a087510fe6a084af742" } ] }, { "vendor": "Linux", "product": "Linux", "defaultStatus": "affected", "versions": [ { "version": "2.6.33", "status": "affected" }, { "version": "0", "status": "unaffected", "versionType": "semver", "lessThan": "2.6.33" }, { "version": "4.19.264", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "4.19.*" }, { "version": "5.4.223", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.4.*" }, { "version": "5.10.153", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.10.*" }, { "version": "5.15.77", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.15.*" }, { "version": "6.0.7", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.0.*" }, { "version": "6.1", "status": "unaffected", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*" } ] } ] } } }