CVE-2026-31594: PCI: endpoint: pci-epf-vntb: Remove duplicate resource teardown
Vulnerability summary
CVE-2026-31594 is a medium (CVSS 5.5) vulnerability in linux. EPSS estimates a 0.12% chance of exploitation in the next 30 days, higher than 2% of scored vulnerabilities.
Not severe (CVSS 5.5, local access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 33 · Related 34Timeline
- 24-04-2026PublishedVulnerability first disclosed.
- 14-06-2026Last modifiedVulnerability information updated.
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.
CVSS metrics
3 scores · 3 sources · 1 version- OSV · UbuntuEcosystem advisory · calculated5.5MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated5.5MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
EPSS trend
Probability
0.12%
Chance of exploitation in the next 30 days
Percentile
2%
Versus all other CVEs
30-day change
Decrease -0.04 pp
From 0.16% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeNo weakness data has been published for this record.
Affected systems
Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.
Ubuntu146 products
- linux< 5.15.0-186.196 | < 6.8.0-136.136 | All versions (No fix recorded) | < 7.0.0-27.27
- linux-allwinner-5.19All versions (No fix recorded)
- linux-aws< 5.15.0-1112.119 | < 6.8.0-1061.64 | All versions (No fix recorded) | < 7.0.0-1008.8
- linux-aws-5.0All versions (No fix recorded)
- linux-aws-5.11All versions (No fix recorded)
Chainguard9 products
- linux-aws-6.12< 6.12.85-r0
- linux-aws-6.18< 6.18.31-r0
- linux-azure-6.18< 6.18.31-r0
- linux-gcp-6.18< 6.18.31-r0
- linux-qemu-6.12< 6.12.85-r0
Linux2 products
- linux≥ e2b6ef72b7aea9d7d480d2df499bcd1c93247abb, < 305a0674bc552bfcc3231e23fb91cf4f62aec168 | ≥ e35f56bb03304abc92c928b641af41ca372966bb, < b261027a1a235d8925e332363f23135a0eff2b35 | ≥ e35f56bb03304abc92c928b641af41ca372966bb, < e238ab12556b00f3b4d8b870b32ba1e4f4d4ebc2 | ≥ e35f56bb03304abc92c928b641af41ca372966bb, < 73bf218de28d039126dc64281d2b47dd3c46a0a3 | ≥ e35f56bb03304abc92c928b641af41ca372966bb, < cec9ead73ab154a7953f6ab8dd5127e0d6bbf95a | ≥ e35f56bb03304abc92c928b641af41ca372966bb, < 478e776101592eb63298714e96823ef78a3295ec | ≥ e35f56bb03304abc92c928b641af41ca372966bb, < a7a3cab4d33fd8a8aed864c447d0d7c99e85404e | ≥ e35f56bb03304abc92c928b641af41ca372966bb, < 0da63230d3ec1ec5fcc443a2314233e95bfece54 | ≥ 5.15.153, < 5.15.209 | 6.0
- linux_kernel≥ 6.0, < 6.6.136 | ≥ 6.7, < 6.12.84 | ≥ 6.13, < 6.18.24 | ≥ 6.19, < 6.19.14 | ≥ 7.0, < 7.0.1
Debian1 product
- linux< 6.1.176-1 | < 6.12.85-1 | < 6.19.14-1
4 vendors · 158 products
