CVE-2026-43200
Estado: AnalizadaMedia (5.5)—
In the Linux kernel, the following vulnerability has been resolved:
PCI: endpoint: Fix swapped parameters in pci_{primary/secondary}_epc_epf_unlink() functions
struct configfs_item_operations callbacks are defined like the following:
While pci_primary_epc_epf_link() and pci_secondary_epc_epf_link() specify the parameters in the correct order, pci_primary_epc_epf_unlink() and pci_secondary_epc_epf_unlink() specify the parameters in the wrong order, leading to the below kernel crash when using the unlink command in configfs:
[mani: cced stable, changed commit message as per https://lore.kernel.org/linux-pci/aV9joi3jF1R6ca02@ryzen]
Detalles técnicos trazas, registros y código del informe original
int (*allow_link)(struct config_item *src, struct config_item *target); void (*drop_link)(struct config_item *src, struct config_item *target); Unable to handle kernel paging request at virtual address 0000000300000857 Mem abort info: ... pc : string+0x54/0x14c lr : vsnprintf+0x280/0x6e8 ... string+0x54/0x14c vsnprintf+0x280/0x6e8 vprintk_default+0x38/0x4c vprintk+0xc4/0xe0 pci_epf_unbind+0xdc/0x108 configfs_unlink+0xe0/0x208+0x44/0x74 vfs_unlink+0x120/0x29c __arm64_sys_unlinkat+0x3c/0x90 invoke_syscall+0x48/0x134 do_el0_svc+0x1c/0x30prop.0+0xd0/0xf0
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: 0.16%
- Percentil entre todas las CVEs puntuadas: 5
- 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)
CWE
- NVD-CWE-noinfo
Referencias
- https://git.kernel.org/stable/c/142b1bba3299264b76ed8ef53cd93b2b2af65d6c
- https://git.kernel.org/stable/c/1c96c1acef4b4a1108fc13f84a8ac0b0633bbb46
- https://git.kernel.org/stable/c/339191811e6fc4559c4008c5af7a91b05086d596
- https://git.kernel.org/stable/c/58686bf62cb38b92e4b28408162a5703775b4d12
- https://git.kernel.org/stable/c/733cbc3aa97e71cc70847e75c925b364cc9b04a6
- https://git.kernel.org/stable/c/8754dd7639ab0fd68c3ab9d91c7bdecc3e5740a8
- https://git.kernel.org/stable/c/aefc0e0bd20f54abe3b501b8798c0be656af272b
JSON original (NVD)
Mostrar
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"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"integrityImpact": "NONE",
"userInteraction": "NONE",
"attackComplexity": "LOW",
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"privilegesRequired": "LOW",
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"published": "2026-05-06T12:16:39.090",
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"weaknesses": [
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"source": "nvd@nist.gov",
"description": [
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"value": "NVD-CWE-noinfo"
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],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nPCI: endpoint: Fix swapped parameters in pci_{primary/secondary}_epc_epf_unlink() functions\n\nstruct configfs_item_operations callbacks are defined like the following:\n\n int (*allow_link)(struct config_item *src, struct config_item *target);\n void (*drop_link)(struct config_item *src, struct config_item *target);\n\nWhile pci_primary_epc_epf_link() and pci_secondary_epc_epf_link() specify\nthe parameters in the correct order, pci_primary_epc_epf_unlink() and\npci_secondary_epc_epf_unlink() specify the parameters in the wrong order,\nleading to the below kernel crash when using the unlink command in\nconfigfs:\n\n Unable to handle kernel paging request at virtual address 0000000300000857\n Mem abort info:\n ...\n pc : string+0x54/0x14c\n lr : vsnprintf+0x280/0x6e8\n ...\n string+0x54/0x14c\n vsnprintf+0x280/0x6e8\n vprintk_default+0x38/0x4c\n vprintk+0xc4/0xe0\n pci_epf_unbind+0xdc/0x108\n configfs_unlink+0xe0/0x208+0x44/0x74\n vfs_unlink+0x120/0x29c\n __arm64_sys_unlinkat+0x3c/0x90\n invoke_syscall+0x48/0x134\n do_el0_svc+0x1c/0x30prop.0+0xd0/0xf0\n\n[mani: cced stable, changed commit message as per https://lore.kernel.org/linux-pci/aV9joi3jF1R6ca02@ryzen]"
}
],
"lastModified": "2026-06-17T10:49:08.443",
"configurations": [
{
"nodes": [
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