CVE-2022-50862
Estado: AplazadaSin puntuar—
In the Linux kernel, the following vulnerability has been resolved:
bpf: prevent decl_tag from being referenced in func_proto
Syzkaller was able to hit the following issue:
Looks like it tries to create a func_proto which return type is decl_tag. For the details, see Martin's spot on analysis in [0].
0: https://lore.kernel.org/bpf/CAKH8qBuQDLva_hHxxBuZzyAcYNO4ejhovz6TQeVSk8HY-2SO6g@mail.gmail.com/T/#mea6524b3fcd6298347432226e81b1e6155efc62c
Detalles técnicos trazas, registros y código del informe original
------------[ cut here ]------------ WARNING: CPU: 0 PID: 3609 at kernel/bpf/btf.c:1946 btf_type_id_size+0x2d5/0x9d0 kernel/bpf/btf.c:1946 Modules linked in: CPU: 0 PID: 3609 Comm: syz-executor361 Not tainted 6.0.0-syzkaller-02734-g0326074ff465 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022 RIP: 0010:btf_type_id_size+0x2d5/0x9d0 kernel/bpf/btf.c:1946 Code: ef e8 7f 8e e4 ff 41 83 ff 0b 77 28 f6 44 24 10 18 75 3f e8 6d 91 e4 ff 44 89 fe bf 0e 00 00 00 e8 20 8e e4 ff e8 5b 91 e4 ff <0f> 0b 45 31 f6 e9 98 02 00 00 41 83 ff 12 74 18 e8 46 91 e4 ff 44 RSP: 0018:ffffc90003cefb40 EFLAGS: 00010293 RAX: 0000000000000000 RBX: 0000000000000002 RCX: 0000000000000000 RDX: ffff8880259c0000 RSI: ffffffff81968415 RDI: 0000000000000005 RBP: ffff88801270ca00 R08: 0000000000000005 R09: 000000000000000e R10: 0000000000000011 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000011 R14: ffff888026ee6424 R15: 0000000000000011 FS: 000055555641b300(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000f2e258 CR3: 000000007110e000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> btf_func_proto_check kernel/bpf/btf.c:4447 [inline] btf_check_all_types kernel/bpf/btf.c:4723 [inline] btf_parse_type_sec kernel/bpf/btf.c:4752 [inline] btf_parse kernel/bpf/btf.c:5026 [inline] btf_new_fd+0x1926/0x1e70 kernel/bpf/btf.c:6892 bpf_btf_load kernel/bpf/syscall.c:4324 [inline] __sys_bpf+0xb7d/0x4cf0 kernel/bpf/syscall.c:5010 __do_sys_bpf kernel/bpf/syscall.c:5069 [inline] __se_sys_bpf kernel/bpf/syscall.c:5067 [inline] __x64_sys_bpf+0x75/0xb0 kernel/bpf/syscall.c:5067 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f0fbae41c69 Code: 28 c3 e8 2a 14 00 00 66 2e 0f 1f 84 00 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffc8aeb6228 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f0fbae41c69 RDX: 0000000000000020 RSI: 0000000020000140 RDI: 0000000000000012 RBP: 00007f0fbae05e10 R08: 0000000000000000 R09: 0000000000000000 R10: 00000000ffffffff R11: 0000000000000246 R12: 00007f0fbae05ea0 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 </TASK>
CVSS
NVD no ha asignado puntuación CVSS a esta CVE (habitual desde el cambio de política de abril de 2026).
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.18%
- Percentil entre todas las CVEs puntuadas: 7
- Fecha de la puntuación: 6/10/2026
EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).
Tecnologías afectadas (1)
⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.
Referencias
JSON original (NVD)
Mostrar
{
"id": "CVE-2022-50862",
"cveTags": [],
"metrics": {},
"affected": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"affectedData": [
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "bd16dee66ae4de3f1726c69ac901d2b7a53b0c86",
"lessThan": "e9dbb4c539d058852b76937dcd7347d3f38054f2",
"versionType": "git"
},
{
"status": "affected",
"version": "bd16dee66ae4de3f1726c69ac901d2b7a53b0c86",
"lessThan": "ea68376c8bed5cd156900852aada20c3a0874d17",
"versionType": "git"
}
],
"programFiles": [
"kernel/bpf/btf.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "5.16"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "5.16",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.0.7",
"versionType": "semver",
"lessThanOrEqual": "6.0.*"
},
{
"status": "unaffected",
"version": "6.1",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"kernel/bpf/btf.c"
],
"defaultStatus": "affected"
}
]
}
],
"published": "2025-12-30T13:16:00.997",
"references": [
{
"url": "https://git.kernel.org/stable/c/e9dbb4c539d058852b76937dcd7347d3f38054f2",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/ea68376c8bed5cd156900852aada20c3a0874d17",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
],
"vulnStatus": "Deferred",
"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"
}
],
"lastModified": "2026-06-17T05:24:18.860",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}