CVE-2026-43200

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

MEDIUM

5.5

CVSS Score

Published: May 6, 2026 at 11:28 AM UTC

Updated: June 17, 2026 at 10:49 AM UTC

1 product affected across 1 vendorLinux Kernel

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Severity

MEDIUM5.5

Exploit prediction

EPSS 0.1%

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]

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Linux Kernel · Linux

95%

5.12 ≤ v < 5.15.2025.12 ≤ v < 6.1.1655.12 ≤ v < 6.12.755.12 ≤ v < 6.18.165.12 ≤ v < 6.19.65.12 ≤ v < 6.6.1285.12 ≤ v < 7.05.16 ≤ v < 6.1.1656.13 ≤ v < 6.18.166.19 ≤ v < 6.19.66.2 ≤ v < 6.6.1286.7 ≤ v < 6.12.755.12e85a2d7837622bd99c96f5bbc7f972da90c285a2

Vendor states this is fixed in 142b1bba3299264b76ed8ef53cd93b2b2af65d6c (fixed)

Vendor states this is fixed in 1c96c1acef4b4a1108fc13f84a8ac0b0633bbb46 (fixed)

Vendor states this is fixed in 339191811e6fc4559c4008c5af7a91b05086d596 (fixed)

Vendor states this is fixed in 58686bf62cb38b92e4b28408162a5703775b4d12 (fixed)

Vendor states this is fixed in 733cbc3aa97e71cc70847e75c925b364cc9b04a6 (fixed)

Vendor states this is fixed in 8754dd7639ab0fd68c3ab9d91c7bdecc3e5740a8 (fixed)

Vendor states this is fixed in aefc0e0bd20f54abe3b501b8798c0be656af272b (fixed)

Vendor states this is fixed in 5.12 (unaffected)

Vendor states this is fixed in 5.15.202 (unaffected)

Vendor states this is fixed in 6.1.165 (unaffected)

Vendor states this is fixed in 6.12.75 (unaffected)

Vendor states this is fixed in 6.18.16 (unaffected)