CVE-2024-40907

Kernel panic via stale RX ring page

Published Jul 12, 2024 · Updated Aug 5, 2026

Use-after-free in the Linux kernel 6.9 ionic driver allows local users to crash the system through XDP_TX packet processing. ionic_tx_clean() frees the transmitted RX page, but the RX ring retains its pointer and later passes the freed page back to packet processing. The path requires an ionic interface handling an XDP_TX action, and the resulting page fault panics the kernel without reported data disclosure or modification.

CVSS severity5.5
Medium
EPSS probability0.61%
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 the Linux kernel 6.9 ionic driver allows local users to crash the system through XDP_TX packet processing. ionic_tx_clean() frees the transmitted RX page, but the RX ring retains its pointer and later passes the freed page back to packet processing. The path requires an ionic interface handling an XDP_TX action, and the resulting page fault panics the kernel without reported data disclosure or modification.

The record

CVE
CVE-2024-40907
Published
Jul 12, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-416, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 12, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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

  1. Affected versionversion=6.9
  2. Affected versionversion=8eeed8373e1cca836799bf8e4a05cffa8e444908 <491aee894a08bc9b8bb52e7363b9d4bc6403f363
  3. Affected versionversion=8eeed8373e1cca836799bf8e4a05cffa8e444908 <8812aa35f3e930f61074b9c1ecea26f354992c21

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.9; version=8eeed8373e1cca836799bf8e4a05cffa8e444908 <491aee894a08bc9b8bb52e7363b9d4bc6403f363; version=8eeed8373e1cca836799bf8e4a05cffa8e444908 <8812aa35f3e930f61074b9c1ecea26f354992c21

Published CVSS scores

5.5UbuntuCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5NIST National Vulnerability DatabaseCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
9.8Linux CNACVSS:3.1/AV:N/AC:L/PR:N/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-416Use After Free
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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