CVE-2026-43200PCI: endpoint: Fix swapped parameters in pci_{primary/secondary}_epc_epf_unlink() functions
- 5.5MediumCVSS base score
- 0.12%Exploitation in 30 daysEPSS · top 98% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
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]
Timeline
ID reserved
By Linux
- 5 days later
· 5 days later
Published
- 5 days later
· 5 days later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Analyzed | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.12% · top 98% of all CVEs (13 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.5.
Affected products
- affected e85a2d7837622bd99c96f5bbc7f972da90c285a2 – < 58686bf62cb38b92e4b28408162a5703775b4d12
- affected e85a2d7837622bd99c96f5bbc7f972da90c285a2 – < 1c96c1acef4b4a1108fc13f84a8ac0b0633bbb46
- affected e85a2d7837622bd99c96f5bbc7f972da90c285a2 – < 142b1bba3299264b76ed8ef53cd93b2b2af65d6c
- affected e85a2d7837622bd99c96f5bbc7f972da90c285a2 – < 339191811e6fc4559c4008c5af7a91b05086d596
- affected e85a2d7837622bd99c96f5bbc7f972da90c285a2 – < 733cbc3aa97e71cc70847e75c925b364cc9b04a6
- affected e85a2d7837622bd99c96f5bbc7f972da90c285a2 – < aefc0e0bd20f54abe3b501b8798c0be656af272b
- affected e85a2d7837622bd99c96f5bbc7f972da90c285a2 – < 8754dd7639ab0fd68c3ab9d91c7bdecc3e5740a8
- affected 5.12
- unaffected < 5.12
- unaffected 5.15.202 – ≤ 5.15.*
- unaffected 6.1.165 – ≤ 6.1.*
- unaffected 6.6.128 – ≤ 6.6.*
- unaffected 6.12.75 – ≤ 6.12.*
- unaffected 6.18.16 – ≤ 6.18.*
- unaffected 6.19.6 – ≤ 6.19.*
- unaffected 7.0 – ≤ *
References
References7
- https://git.kernel.org/stable/c/58686bf62cb38b92e4b28408162a5703775b4d12 (opens in a new tab)
- https://git.kernel.org/stable/c/1c96c1acef4b4a1108fc13f84a8ac0b0633bbb46 (opens in a new tab)
- https://git.kernel.org/stable/c/142b1bba3299264b76ed8ef53cd93b2b2af65d6c (opens in a new tab)
- https://git.kernel.org/stable/c/339191811e6fc4559c4008c5af7a91b05086d596 (opens in a new tab)
- https://git.kernel.org/stable/c/733cbc3aa97e71cc70847e75c925b364cc9b04a6 (opens in a new tab)
- https://git.kernel.org/stable/c/aefc0e0bd20f54abe3b501b8798c0be656af272b (opens in a new tab)
- https://git.kernel.org/stable/c/8754dd7639ab0fd68c3ab9d91c7bdecc3e5740a8 (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-27761 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-43200)Record last updated .