{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2022-50862","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2025-12-30T12:06:07.135Z","datePublished":"2025-12-30T12:15:35.177Z","dateUpdated":"2026-05-11T19:26:33.642Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-05-11T19:26:33.642Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: prevent decl_tag from being referenced in func_proto\n\nSyzkaller was able to hit the following issue:\n\n------------[ cut here ]------------\nWARNING: CPU: 0 PID: 3609 at kernel/bpf/btf.c:1946\nbtf_type_id_size+0x2d5/0x9d0 kernel/bpf/btf.c:1946\nModules linked in:\nCPU: 0 PID: 3609 Comm: syz-executor361 Not tainted\n6.0.0-syzkaller-02734-g0326074ff465 #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS\nGoogle 09/22/2022\nRIP: 0010:btf_type_id_size+0x2d5/0x9d0 kernel/bpf/btf.c:1946\nCode: ef e8 7f 8e e4 ff 41 83 ff 0b 77 28 f6 44 24 10 18 75 3f e8 6d 91\ne4 ff 44 89 fe bf 0e 00 00 00 e8 20 8e e4 ff e8 5b 91 e4 ff <0f> 0b 45\n31 f6 e9 98 02 00 00 41 83 ff 12 74 18 e8 46 91 e4 ff 44\nRSP: 0018:ffffc90003cefb40 EFLAGS: 00010293\nRAX: 0000000000000000 RBX: 0000000000000002 RCX: 0000000000000000\nRDX: ffff8880259c0000 RSI: ffffffff81968415 RDI: 0000000000000005\nRBP: ffff88801270ca00 R08: 0000000000000005 R09: 000000000000000e\nR10: 0000000000000011 R11: 0000000000000000 R12: 0000000000000000\nR13: 0000000000000011 R14: ffff888026ee6424 R15: 0000000000000011\nFS:  000055555641b300(0000) GS:ffff8880b9a00000(0000)\nknlGS:0000000000000000\nCS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 0000000000f2e258 CR3: 000000007110e000 CR4: 00000000003506f0\nDR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\nDR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\nCall Trace:\n <TASK>\n btf_func_proto_check kernel/bpf/btf.c:4447 [inline]\n btf_check_all_types kernel/bpf/btf.c:4723 [inline]\n btf_parse_type_sec kernel/bpf/btf.c:4752 [inline]\n btf_parse kernel/bpf/btf.c:5026 [inline]\n btf_new_fd+0x1926/0x1e70 kernel/bpf/btf.c:6892\n bpf_btf_load kernel/bpf/syscall.c:4324 [inline]\n __sys_bpf+0xb7d/0x4cf0 kernel/bpf/syscall.c:5010\n __do_sys_bpf kernel/bpf/syscall.c:5069 [inline]\n __se_sys_bpf kernel/bpf/syscall.c:5067 [inline]\n __x64_sys_bpf+0x75/0xb0 kernel/bpf/syscall.c:5067\n do_syscall_x64 arch/x86/entry/common.c:50 [inline]\n do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80\n entry_SYSCALL_64_after_hwframe+0x63/0xcd\nRIP: 0033:0x7f0fbae41c69\nCode: 28 c3 e8 2a 14 00 00 66 2e 0f 1f 84 00 00 00 00 00 48 89 f8 48 89\nf7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01\nf0 ff ff 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48\nRSP: 002b:00007ffc8aeb6228 EFLAGS: 00000246 ORIG_RAX: 0000000000000141\nRAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f0fbae41c69\nRDX: 0000000000000020 RSI: 0000000020000140 RDI: 0000000000000012\nRBP: 00007f0fbae05e10 R08: 0000000000000000 R09: 0000000000000000\nR10: 00000000ffffffff R11: 0000000000000246 R12: 00007f0fbae05ea0\nR13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000\n </TASK>\n\nLooks like it tries to create a func_proto which return type is\ndecl_tag. For the details, see Martin's spot on analysis in [0].\n\n0: https://lore.kernel.org/bpf/CAKH8qBuQDLva_hHxxBuZzyAcYNO4ejhovz6TQeVSk8HY-2SO6g@mail.gmail.com/T/#mea6524b3fcd6298347432226e81b1e6155efc62c"}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["kernel/bpf/btf.c"],"versions":[{"version":"bd16dee66ae4de3f1726c69ac901d2b7a53b0c86","lessThan":"e9dbb4c539d058852b76937dcd7347d3f38054f2","status":"affected","versionType":"git"},{"version":"bd16dee66ae4de3f1726c69ac901d2b7a53b0c86","lessThan":"ea68376c8bed5cd156900852aada20c3a0874d17","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["kernel/bpf/btf.c"],"versions":[{"version":"5.16","status":"affected"},{"version":"0","lessThan":"5.16","status":"unaffected","versionType":"semver"},{"version":"6.0.7","lessThanOrEqual":"6.0.*","status":"unaffected","versionType":"semver"},{"version":"6.1","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.16","versionEndExcluding":"6.0.7"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.16","versionEndExcluding":"6.1"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/e9dbb4c539d058852b76937dcd7347d3f38054f2"},{"url":"https://git.kernel.org/stable/c/ea68376c8bed5cd156900852aada20c3a0874d17"}],"title":"bpf: prevent decl_tag from being referenced in func_proto","x_generator":{"engine":"bippy-1.2.0"}}}}