GHSA-H3WC-X575-RQJQ
Vulnerability from github – Published: 2026-05-06 12:30 – Updated: 2026-05-11 21:31In 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:
int (allow_link)(struct config_item src, struct config_item target); void (drop_link)(struct config_item src, struct config_item target);
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:
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
[mani: cced stable, changed commit message as per https://lore.kernel.org/linux-pci/aV9joi3jF1R6ca02@ryzen]
{
"affected": [],
"aliases": [
"CVE-2026-43200"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-05-06T12:16:39Z",
"severity": "MODERATE"
},
"details": "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]",
"id": "GHSA-h3wc-x575-rqjq",
"modified": "2026-05-11T21:31:30Z",
"published": "2026-05-06T12:30:32Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-43200"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/142b1bba3299264b76ed8ef53cd93b2b2af65d6c"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/1c96c1acef4b4a1108fc13f84a8ac0b0633bbb46"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/339191811e6fc4559c4008c5af7a91b05086d596"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/58686bf62cb38b92e4b28408162a5703775b4d12"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/733cbc3aa97e71cc70847e75c925b364cc9b04a6"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/8754dd7639ab0fd68c3ab9d91c7bdecc3e5740a8"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/aefc0e0bd20f54abe3b501b8798c0be656af272b"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
Sightings
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