HOMEVULNERABILITIESCVE-2026-31594
MEDIUM

CVE-2026-31594

Published: April 24, 2026· Updated: Apr 29, 2026

5.5
CVSS v3.1
EPSS:0.02%probability of exploitation in 30 daysPercentile:4.6th

Official 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.

NVD Source

Technical Analysis

CVE-2026-31594 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in availability disruption (denial of service), with a CVSS base score of 5.5.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorLocal
Attack ComplexityLow
Privileges Req.Low
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityNone
AvailabilityHigh
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected Vendors & Products

Linux1 product
linux kernel
Source: NVD CPE · 1 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttps://git.kernel.org/stable/c/0da63230d3ec1ec5fcc443a2314233e95bfece54
PATCHhttps://git.kernel.org/stable/c/478e776101592eb63298714e96823ef78a3295ec
PATCHhttps://git.kernel.org/stable/c/73bf218de28d039126dc64281d2b47dd3c46a0a3
PATCHhttps://git.kernel.org/stable/c/a7a3cab4d33fd8a8aed864c447d0d7c99e85404e
PATCHhttps://git.kernel.org/stable/c/cec9ead73ab154a7953f6ab8dd5127e0d6bbf95a
PATCHhttps://git.kernel.org/stable/c/e238ab12556b00f3b4d8b870b32ba1e4f4d4ebc2

All References (6)

→
https://git.kernel.org/stable/c/0da63230d3ec1ec5fcc443a2314233e95bfece54Patch
→
https://git.kernel.org/stable/c/478e776101592eb63298714e96823ef78a3295ecPatch
→
https://git.kernel.org/stable/c/73bf218de28d039126dc64281d2b47dd3c46a0a3Patch
→
https://git.kernel.org/stable/c/a7a3cab4d33fd8a8aed864c447d0d7c99e85404ePatch
→
https://git.kernel.org/stable/c/cec9ead73ab154a7953f6ab8dd5127e0d6bbf95aPatch
→
https://git.kernel.org/stable/c/e238ab12556b00f3b4d8b870b32ba1e4f4d4ebc2Patch

Quick Facts

CVE IDCVE-2026-31594
CVSS Score5.5 / 10
SeverityMEDIUM
CISA KEVNo
EPSS (30d)0.02%
Affected1 vendor
PublishedApr 24, 2026

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2026-31594 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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