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

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Summary

CVECVE-2026-43200
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-05-06 12:16:39 UTC
Updated2026-05-11 20:10:53 UTC
DescriptionIn 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]

Risk And Classification

Primary CVSS: v3.1 5.5 MEDIUM from [email protected]

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Problem Types: NVD-CWE-noinfo

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Linux Linux Kernel All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected e85a2d7837622bd99c96f5bbc7f972da90c285a2 58686bf62cb38b92e4b28408162a5703775b4d12 git Not specified
CNA Linux Linux affected e85a2d7837622bd99c96f5bbc7f972da90c285a2 1c96c1acef4b4a1108fc13f84a8ac0b0633bbb46 git Not specified
CNA Linux Linux affected e85a2d7837622bd99c96f5bbc7f972da90c285a2 142b1bba3299264b76ed8ef53cd93b2b2af65d6c git Not specified
CNA Linux Linux affected e85a2d7837622bd99c96f5bbc7f972da90c285a2 339191811e6fc4559c4008c5af7a91b05086d596 git Not specified
CNA Linux Linux affected e85a2d7837622bd99c96f5bbc7f972da90c285a2 733cbc3aa97e71cc70847e75c925b364cc9b04a6 git Not specified
CNA Linux Linux affected e85a2d7837622bd99c96f5bbc7f972da90c285a2 aefc0e0bd20f54abe3b501b8798c0be656af272b git Not specified
CNA Linux Linux affected e85a2d7837622bd99c96f5bbc7f972da90c285a2 8754dd7639ab0fd68c3ab9d91c7bdecc3e5740a8 git Not specified
CNA Linux Linux affected 5.12 Not specified
CNA Linux Linux unaffected 5.12 semver Not specified
CNA Linux Linux unaffected 5.15.202 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.165 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.128 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.75 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.16 6.18.* semver Not specified
CNA Linux Linux unaffected 6.19.6 6.19.* semver Not specified
CNA Linux Linux unaffected 7.0 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/58686bf62cb38b92e4b28408162a5703775b4d12 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/733cbc3aa97e71cc70847e75c925b364cc9b04a6 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/1c96c1acef4b4a1108fc13f84a8ac0b0633bbb46 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/142b1bba3299264b76ed8ef53cd93b2b2af65d6c 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/339191811e6fc4559c4008c5af7a91b05086d596 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/aefc0e0bd20f54abe3b501b8798c0be656af272b 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/8754dd7639ab0fd68c3ab9d91c7bdecc3e5740a8 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
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