CVE-2026-64254
Estado: AnalizadaMedia (5.5)—
In the Linux kernel, the following vulnerability has been resolved:
NTB: epf: Avoid pci_iounmap() with offset when PEER_SPAD and CONFIG share BAR
When BAR_PEER_SPAD and BAR_CONFIG share one PCI BAR, the module teardown path ends up calling pci_iounmap() on the same iomem with some offset, which is unnecessary and triggers a kernel warning like the following:
Fix it by unmapping only when PEER_SPAD and CONFIG use difference bars.
Detalles técnicos trazas, registros y código del informe original
Trying to vunmap() nonexistent vm area (0000000069a5ffe8) WARNING: mm/vmalloc.c:3470 at vunmap+0x58/0x68, CPU#5: modprobe/2937 [...] Call trace: vunmap+0x58/0x68 (P) iounmap+0x34/0x48 pci_iounmap+0x2c/0x40 ntb_epf_pci_remove+0x44/0x80 [ntb_hw_epf] pci_device_remove+0x48/0xf8 device_remove+0x50/0x88 device_release_driver_internal+0x1c8/0x228 driver_detach+0x50/0xb0 bus_remove_driver+0x74/0x100 driver_unregister+0x34/0x68 pci_unregister_driver+0x34/0xa0 ntb_epf_pci_driver_exit+0x14/0xfe0 [ntb_hw_epf] [...]
CVSS
- Versión: 3.1
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- Puntuación base: 5.5
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.11%
- Percentil entre todas las CVEs puntuadas: 1
- 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)
CWE
- CWE-617
Referencias
- https://git.kernel.org/stable/c/06f6dd2ff2bd07eaf7178a807407ff27e85122b4
- https://git.kernel.org/stable/c/81371dbd23601f67f01372817fdbab42c5601e43
- https://git.kernel.org/stable/c/9764a786ba98db58f0725913c369e721253aba33
- https://git.kernel.org/stable/c/a4be4a1308f02bff79a30eea2d04ead5b63685f2
- https://git.kernel.org/stable/c/d876153680e3d721d385e554def919bce3d18c74
- https://git.kernel.org/stable/c/eb47b9bffd07a47b84910847cb5ea066ce184055
JSON original (NVD)
Mostrar
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nNTB: epf: Avoid pci_iounmap() with offset when PEER_SPAD and CONFIG share BAR\n\nWhen BAR_PEER_SPAD and BAR_CONFIG share one PCI BAR, the module teardown\npath ends up calling pci_iounmap() on the same iomem with some offset,\nwhich is unnecessary and triggers a kernel warning like the following:\n\n Trying to vunmap() nonexistent vm area (0000000069a5ffe8)\n WARNING: mm/vmalloc.c:3470 at vunmap+0x58/0x68, CPU#5: modprobe/2937\n [...]\n Call trace:\n vunmap+0x58/0x68 (P)\n iounmap+0x34/0x48\n pci_iounmap+0x2c/0x40\n ntb_epf_pci_remove+0x44/0x80 [ntb_hw_epf]\n pci_device_remove+0x48/0xf8\n device_remove+0x50/0x88\n device_release_driver_internal+0x1c8/0x228\n driver_detach+0x50/0xb0\n bus_remove_driver+0x74/0x100\n driver_unregister+0x34/0x68\n pci_unregister_driver+0x34/0xa0\n ntb_epf_pci_driver_exit+0x14/0xfe0 [ntb_hw_epf]\n [...]\n\nFix it by unmapping only when PEER_SPAD and CONFIG use difference bars."
}
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