CVE-2026-43200

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

State: Published
Severity: Not scored
Published: May 6, 2026
Updated: May 11, 2026
Reserved: May 1, 2026

Description

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]

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	e85a2d7837622bd99c96f5bbc7f972da90c285a2 to before 58686bf62cb38b92e4b28408162a5703775b4d12Affected e85a2d7837622bd99c96f5bbc7f972da90c285a2 to before 1c96c1acef4b4a1108fc13f84a8ac0b0633bbb46Affected e85a2d7837622bd99c96f5bbc7f972da90c285a2 to before 142b1bba3299264b76ed8ef53cd93b2b2af65d6cAffected e85a2d7837622bd99c96f5bbc7f972da90c285a2 to before 339191811e6fc4559c4008c5af7a91b05086d596Affected e85a2d7837622bd99c96f5bbc7f972da90c285a2 to before 733cbc3aa97e71cc70847e75c925b364cc9b04a6Affected e85a2d7837622bd99c96f5bbc7f972da90c285a2 to before aefc0e0bd20f54abe3b501b8798c0be656af272bAffected e85a2d7837622bd99c96f5bbc7f972da90c285a2 to before 8754dd7639ab0fd68c3ab9d91c7bdecc3e5740a8Affected
LinuxLinux	5.12Affected before 5.12Not affected 5.15.202 through 5.15.Not affected 6.1.165 through 6.1.Not affected 6.6.128 through 6.6.Not affected 6.12.75 through 6.12.Not affected 6.18.16 through 6.18.Not affected 6.19.6 through 6.19.Not affected 7.0 and laterNot affected

Product

Versions

LinuxLinux

e85a2d7837622bd99c96f5bbc7f972da90c285a2 to before 58686bf62cb38b92e4b28408162a5703775b4d12Affected
e85a2d7837622bd99c96f5bbc7f972da90c285a2 to before 1c96c1acef4b4a1108fc13f84a8ac0b0633bbb46Affected
e85a2d7837622bd99c96f5bbc7f972da90c285a2 to before 142b1bba3299264b76ed8ef53cd93b2b2af65d6cAffected
e85a2d7837622bd99c96f5bbc7f972da90c285a2 to before 339191811e6fc4559c4008c5af7a91b05086d596Affected
e85a2d7837622bd99c96f5bbc7f972da90c285a2 to before 733cbc3aa97e71cc70847e75c925b364cc9b04a6Affected
e85a2d7837622bd99c96f5bbc7f972da90c285a2 to before aefc0e0bd20f54abe3b501b8798c0be656af272bAffected
e85a2d7837622bd99c96f5bbc7f972da90c285a2 to before 8754dd7639ab0fd68c3ab9d91c7bdecc3e5740a8Affected

LinuxLinux

5.12Affected
before 5.12Not affected
5.15.202 through 5.15.*Not affected
6.1.165 through 6.1.*Not affected
6.6.128 through 6.6.*Not affected
6.12.75 through 6.12.*Not affected
6.18.16 through 6.18.*Not affected
6.19.6 through 6.19.*Not affected
7.0 and laterNot affected

References

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