CVE-2026-31594

MediumCVSS 5.5/10Last modified Nov 11, 2026

Description

In the Linux kernel, the following vulnerability has been resolved:

PCI: endpoint: pci-epf-vntb: Remove duplicate resource teardown

epf_ntb_epc_destroy() duplicates the teardown that the caller is supposed to perform later. This leads to an oops when .allow_link fails or when .drop_link is performed. The following is an example oops of the former case:

Unable to handle kernel paging request at virtual address dead000000000108 [...] [dead000000000108] address between user and kernel address ranges Internal error: Oops: 0000000096000044 [#1] SMP [...] Call trace: pci_epc_remove_epf+0x78/0xe0 (P) pci_primary_epc_epf_link+0x88/0xa8 configfs_symlink+0x1f4/0x5a0 vfs_symlink+0x134/0x1d8 do_symlinkat+0x88/0x138 __arm64_sys_symlinkat+0x74/0xe0 [...]

Remove the helper, and drop pci_epc_put(). EPC device refcounting is tied to the configfs EPC group lifetime, and pci_epc_put() in the .drop_link path is sufficient.

Metrics

CVSS 3.1 5.5/10CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected software

VendorProductVersions
LinuxLinux>= e2b6ef72b7aea9d7d480d2df499bcd1c93247abb, < 305a0674bc552bfcc3231e23fb91cf4f62aec168; >= e35f56bb03304abc92c928b641af41ca372966bb, < b261027a1a235d8925e332363f23135a0eff2b35; >= e35f56bb03304abc92c928b641af41ca372966bb, < e238ab12556b00f3b4d8b870b32ba1e4f4d4ebc2; >= e35f56bb03304abc92c928b641af41ca372966bb, < 73bf218de28d039126dc64281d2b47dd3c46a0a3; >= e35f56bb03304abc92c928b641af41ca372966bb, < cec9ead73ab154a7953f6ab8dd5127e0d6bbf95a; >= e35f56bb03304abc92c928b641af41ca372966bb, < 478e776101592eb63298714e96823ef78a3295ec; >= e35f56bb03304abc92c928b641af41ca372966bb, < a7a3cab4d33fd8a8aed864c447d0d7c99e85404e; >= e35f56bb03304abc92c928b641af41ca372966bb, < 0da63230d3ec1ec5fcc443a2314233e95bfece54; >= 5.15.153, < 5.15.209
LinuxLinux6.0

References

Timeline

Published
Apr 24, 2026
Last modified
Nov 11, 2026
NVD status
Modified

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