CVE-2026-92485
Estado: RecibidaAlta (7.8)—
In the Linux kernel, the following vulnerability has been resolved:
bpf: Fix WARNING in bpf_tracing_link_release
The trampoline could be corrupted by the blindly 'tr->flags = BPF_TRAMP_F_TAIL_CALL_CTX' in verifier.
Fix the warning by updating 'tr->flags' with '|=' and lock.
Detalles técnicos trazas, registros y código del informe original
1. A fexit attached to a tail_call_reachable prog. 'tr->flags' became 'BPF_TRAMP_F_CALL_ORIG | BPF_TRAMP_F_TAIL_CALL_CTX'. And, the trampoline would poke the target prog's nop insn using jmp insn instead of call insn. 2. Another fexit loaded with the same tail_call_reachable prog target. 'tr->flags' became 'BPF_TRAMP_F_TAIL_CALL_CTX'. 3. Close the first fexit link. Due to no BPF_TRAMP_F_CALL_ORIG in 'tr->flags', the trampoline will fail to restore the prog's nop insn using call insn. [ 3.410719] WARNING: kernel/bpf/syscall.c:3551 at bpf_tracing_link_release+0x53/0x60, CPU#1: test_progs/98 ... [ 3.428793] bpf_link_free+0x58/0x130 [ 3.429293] bpf_link_release+0x23/0x30
CVSS
- Versión: 3.1
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Puntuación base: 7.8
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.17%
- Percentil entre todas las CVEs puntuadas: 5
- Fecha de la puntuación: 4/10/2026
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).
🎯 Técnicas ATT&CK
Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.
- Explotación
T1068Exploitation for Privilege Escalationprivilege escalation60 %
Inferido por reglas deterministas a partir del vector CVSS y la CWE. Solo orientativo.
🛡️ Mitigaciones ATT&CK que cubren estas técnicas
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-2026-92485",
"cveTags": [],
"metrics": {
"cvssMetricV31": [
{
"type": "Secondary",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"cvssData": {
"scope": "UNCHANGED",
"version": "3.1",
"baseScore": 7.8,
"attackVector": "LOCAL",
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"integrityImpact": "HIGH",
"userInteraction": "NONE",
"attackComplexity": "LOW",
"availabilityImpact": "HIGH",
"privilegesRequired": "LOW",
"confidentialityImpact": "HIGH"
},
"impactScore": 5.9,
"exploitabilityScore": 1.8
}
]
},
"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": "2b5dcb31a19a2e0acd869b12c9db9b2d696ef544",
"lessThan": "48a0209d8da0d90a7b0a0db19d1ff88027b13781",
"versionType": "git"
},
{
"status": "affected",
"version": "2b5dcb31a19a2e0acd869b12c9db9b2d696ef544",
"lessThan": "61aaa8782bec59ecffd22e030f54ef9351bcabf9",
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{
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{
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"version": "028480eaf2a1401e914a1fa1a4a21d877cf0ae30",
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{
"status": "affected",
"version": "8f873cc3f67f2257493063e57d0caf07ef889ee9",
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},
{
"status": "affected",
"version": "6.1.72",
"lessThan": "6.2",
"versionType": "semver"
},
{
"status": "affected",
"version": "6.5.12",
"lessThan": "6.6",
"versionType": "semver"
},
{
"status": "affected",
"version": "6.6.2",
"lessThan": "6.7",
"versionType": "semver"
}
],
"programFiles": [
"include/linux/bpf.h",
"kernel/bpf/trampoline.c",
"kernel/bpf/verifier.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.7"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.7",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "7.2.6",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3-rc1",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"include/linux/bpf.h",
"kernel/bpf/trampoline.c",
"kernel/bpf/verifier.c"
],
"defaultStatus": "affected"
}
]
}
],
"published": "2026-09-17T17:17:50.590",
"references": [
{
"url": "https://git.kernel.org/stable/c/48a0209d8da0d90a7b0a0db19d1ff88027b13781",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/61aaa8782bec59ecffd22e030f54ef9351bcabf9",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
],
"vulnStatus": "Received",
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Fix WARNING in bpf_tracing_link_release\n\nThe trampoline could be corrupted by the blindly\n'tr->flags = BPF_TRAMP_F_TAIL_CALL_CTX' in verifier.\n\n1. A fexit attached to a tail_call_reachable prog. 'tr->flags' became\n 'BPF_TRAMP_F_CALL_ORIG | BPF_TRAMP_F_TAIL_CALL_CTX'. And, the\n trampoline would poke the target prog's nop insn using jmp insn instead\n of call insn.\n2. Another fexit loaded with the same tail_call_reachable prog target.\n 'tr->flags' became 'BPF_TRAMP_F_TAIL_CALL_CTX'.\n3. Close the first fexit link. Due to no BPF_TRAMP_F_CALL_ORIG in\n 'tr->flags', the trampoline will fail to restore the prog's nop insn\n using call insn.\n\n[ 3.410719] WARNING: kernel/bpf/syscall.c:3551 at bpf_tracing_link_release+0x53/0x60, CPU#1: test_progs/98\n...\n[ 3.428793] bpf_link_free+0x58/0x130\n[ 3.429293] bpf_link_release+0x23/0x30\n\nFix the warning by updating 'tr->flags' with '|=' and lock."
}
],
"lastModified": "2026-09-18T18:18:12.610",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}