CVE-2025-39783

Kernel memory corruption via list-head deletion

Published Sep 11, 2025 · Updated Sep 11, 2025

Use-after-free in Linux kernel 4.18 and later affected branches allows local users to corrupt memory during PCI endpoint driver teardown. pci_epf_remove_cfs() incorrectly passes the epf_group list head to list_del() as though it were a list entry, causing an invalid write after teardown. Triggering the defect requires permission to remove an endpoint function driver with a configfs attribute group; the published reproduction records a KASAN slab-use-after-free warning rather than demonstrated code execution.

CVSS severity7.8
High
EPSS probability0.16%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in Linux kernel 4.18 and later affected branches allows local users to corrupt memory during PCI endpoint driver teardown. pci_epf_remove_cfs() incorrectly passes the epf_group list head to list_del() as though it were a list entry, causing an invalid write after teardown. Triggering the defect requires permission to remove an endpoint function driver with a configfs attribute group; the published reproduction records a KASAN slab-use-after-free warning rather than demonstrated code execution.

The record

CVE
CVE-2025-39783
Published
Sep 11, 2025
Updated
Sep 11, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-787, T1068
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Sep 11, 2025CVE publishedPublication date reported by the CVE source.
  2. Sep 11, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=4.18
  2. Affected versionversion=ef1433f717a2c63747a519d86965d73ff9bd08b3 <0758862386f114d9ab1e23181461bd1e2e9ec4c6
  3. Affected versionversion=ef1433f717a2c63747a519d86965d73ff9bd08b3 <409af8b9f7b4f23cd0464e71c6cd6fe13c076ae2
  4. Affected versionversion=ef1433f717a2c63747a519d86965d73ff9bd08b3 <6cf65505523224cab1449d726d2ce8180c2941ee
  5. Affected versionversion=ef1433f717a2c63747a519d86965d73ff9bd08b3 <80ea6e6904fb2ba4ccb5d909579988466ec65358
  6. Affected versionversion=ef1433f717a2c63747a519d86965d73ff9bd08b3 <a302bd89db35d8b7e279de4d2b41c16c7f191069
  7. Affected versionversion=ef1433f717a2c63747a519d86965d73ff9bd08b3 <d5aecddc3452371d9da82cdbb0c715812524b54b
  8. Affected versionversion=ef1433f717a2c63747a519d86965d73ff9bd08b3 <d79123d79a8154b4318529b7b2ff7e15806f480b
  9. Affected versionversion=ef1433f717a2c63747a519d86965d73ff9bd08b3 <dc4ffbd571716ff3b171418fb03abe80e720a7b1

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

The Linux Kernel Organization · Linuxversion=4.18; version=ef1433f717a2c63747a519d86965d73ff9bd08b3 <0758862386f114d9ab1e23181461bd1e2e9ec4c6; version=ef1433f717a2c63747a519d86965d73ff9bd08b3 <409af8b9f7b4f23cd0464e71c6cd6fe13c076ae2; version=ef1433f717a2c63747a519d86965d73ff9bd08b3 <6cf65505523224cab1449d726d2ce8180c2941ee; version=ef1433f717a2c63747a519d86965d73ff9bd08b3 <80ea6e6904fb2ba4ccb5d909579988466ec65358; version=ef1433f717a2c63747a519d86965d73ff9bd08b3 <a302bd89db35d8b7e279de4d2b41c16c7f191069; version=ef1433f717a2c63747a519d86965d73ff9bd08b3 <d5aecddc3452371d9da82cdbb0c715812524b54b; version=ef1433f717a2c63747a519d86965d73ff9bd08b3 <d79123d79a8154b4318529b7b2ff7e15806f480b; version=ef1433f717a2c63747a519d86965d73ff9bd08b3 <dc4ffbd571716ff3b171418fb03abe80e720a7b1

Published CVSS scores

7.8NIST National Vulnerability DatabaseCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-787Out-of-bounds Write
T1068Exploitation for Privilege Escalation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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