Medium 5.5Published May 6, 2026

CVE-2026-43200PCI: endpoint: Fix swapped parameters in pci_{primary/secondary}_epc_epf_unlink() functions

Updated under an hour ago (Oct 27, 2026, 8:10 PM ET)

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Exploited in the last 30 days

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: 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]

CVSS: 5.5 MEDIUM (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Analyzed
Record last updated: May 11, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from e85a2d7837622bd99c96f5bbc7f972da90c285a2 before 58686bf62cb38b92e4b28408162a5703775b4d12; from e85a2d7837622bd99c96f5bbc7f972da90c285a2 before 1c96c1acef4b4a1108fc13f84a8ac0b0633bbb46; from e85a2d7837622bd99c96f5bbc7f972da90c285a2 before 142b1bba3299264b76ed8ef53cd93b2b2af65d6c; from e85a2d7837622bd99c96f5bbc7f972da90c285a2 before 339191811e6fc4559c4008c5af7a91b05086d596; from e85a2d7837622bd99c96f5bbc7f972da90c285a2 before 733cbc3aa97e71cc70847e75c925b364cc9b04a6; from e85a2d7837622bd99c96f5bbc7f972da90c285a2 before aefc0e0bd20f54abe3b501b8798c0be656af272b; from e85a2d7837622bd99c96f5bbc7f972da90c285a2 before 8754dd7639ab0fd68c3ab9d91c7bdecc3e5740a8	CNA record
linux linux_kernel linux:linux_kernel	from 5.12 before 5.15.202; from 5.16 before 6.1.165; from 6.2 before 6.6.128; from 6.7 before 6.12.75; from 6.13 before 6.18.16; from 6.19 before 6.19.6	NVD

References

References

https://git.kernel.org/stable/c/58686bf62cb38b92e4b28408162a5703775b4d12	patch
https://git.kernel.org/stable/c/1c96c1acef4b4a1108fc13f84a8ac0b0633bbb46	patch
https://git.kernel.org/stable/c/142b1bba3299264b76ed8ef53cd93b2b2af65d6c	patch
https://git.kernel.org/stable/c/339191811e6fc4559c4008c5af7a91b05086d596	patch
https://git.kernel.org/stable/c/733cbc3aa97e71cc70847e75c925b364cc9b04a6	patch
https://git.kernel.org/stable/c/aefc0e0bd20f54abe3b501b8798c0be656af272b	patch
https://git.kernel.org/stable/c/8754dd7639ab0fd68c3ab9d91c7bdecc3e5740a8	patch

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.