CVE-2026-97947
In the Linux kernel, the following vulnerability has been resolved:
x86/amd_node: Fix potential NULL pointer dereference
amd_smn_read/write() are exported functions around __amd_smn_rw(), so they are always available even if amd_smn_init() fails. In that case, 'amd_roots' is NULL and __amd_smn_rw() will access uninitialized memory.
Then, commit:
added the 'smn_exclusive' flag, which indicated the calls to pci_request_config_region_exclusive() succeeded, to prevent concurrent userspace access.
Commit:
re-ordered initialization so pci_request_config_region_exclusive() is called earlier and a failure exits amd_smn_init() before allocating 'amd_roots'.
Leer descripción completaMostrar menos
The setting of 'smn_exclusive' moved to the end of amd_smn_init(), after 'amd_roots' is allocated. It became redundant and can be removed.
Replace 'smn_exclusive' with directly checking 'amd_roots', to fix a potential NULL pointer dereference and to simplify the logic.
Detalles técnicos trazas, registros y código del informe original
83518453074d ("x86/amd_node: Add SMN offsets to exclusive region access")
0a4b61d9c2e4 ("x86/amd_node: Fix AMD root device caching")
[ bp: Reorg commit message, touchup comment. ]
[ mingo: Rebase & further touchups. ]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: 0.20%
- Percentil entre todas las CVEs puntuadas: 9
- Fecha de la puntuación: 5/10/2026
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-2026-97947",
"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": "77466b798d59d6761501ff36094cf430d3876549",
"lessThan": "fcd19bc829eca237742a3b123f839ad1c473ec85",
"versionType": "git"
},
{
"status": "affected",
"version": "77466b798d59d6761501ff36094cf430d3876549",
"lessThan": "a797a2331e5d2ecdbccbae222ea71c759fdb2c2b",
"versionType": "git"
},
{
"status": "affected",
"version": "77466b798d59d6761501ff36094cf430d3876549",
"lessThan": "aefdbd574a362dcf7569bada6d72f64a006b9fb9",
"versionType": "git"
}
],
"programFiles": [
"arch/x86/kernel/amd_node.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.14"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.14",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.18.53",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.7",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3-rc3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"arch/x86/kernel/amd_node.c"
],
"defaultStatus": "affected"
}
]
}
],
"published": "2026-09-25T11:17:22.213",
"references": [
{
"url": "https://git.kernel.org/stable/c/a797a2331e5d2ecdbccbae222ea71c759fdb2c2b",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/aefdbd574a362dcf7569bada6d72f64a006b9fb9",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/fcd19bc829eca237742a3b123f839ad1c473ec85",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
],
"vulnStatus": "Received",
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nx86/amd_node: Fix potential NULL pointer dereference\n\namd_smn_read/write() are exported functions around __amd_smn_rw(), so\nthey are always available even if amd_smn_init() fails. In that case,\n'amd_roots' is NULL and __amd_smn_rw() will access uninitialized memory.\n\nThen, commit:\n\n 83518453074d (\"x86/amd_node: Add SMN offsets to exclusive region access\")\n\nadded the 'smn_exclusive' flag, which indicated the calls to\npci_request_config_region_exclusive() succeeded, to prevent\nconcurrent userspace access.\n\nCommit:\n\n 0a4b61d9c2e4 (\"x86/amd_node: Fix AMD root device caching\")\n\nre-ordered initialization so pci_request_config_region_exclusive() is\ncalled earlier and a failure exits amd_smn_init() before allocating\n'amd_roots'. The setting of 'smn_exclusive' moved to the end of\namd_smn_init(), after 'amd_roots' is allocated. It became redundant\nand can be removed.\n\nReplace 'smn_exclusive' with directly checking 'amd_roots', to fix a\npotential NULL pointer dereference and to simplify the logic.\n\n [ bp: Reorg commit message, touchup comment. ]\n [ mingo: Rebase & further touchups. ]"
}
],
"lastModified": "2026-09-25T11:17:22.213",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}