CVE-2024-35839

Kernel crash via stale net_device pointer reuse

Published May 17, 2024 · Updated Aug 5, 2026

Use-after-free in Linux kernel netfilter bridge handling allows local users to crash the host through crafted bridged DNAT traffic. The nf_bridge_info structure retains physindev as an unprotected net_device pointer, and a queued packet later restores skb->dev from that pointer after the device can be freed. The path requires local low-privileged access and bridged DNAT traffic with an unresolved ARP neighbor; successful triggering causes a kernel crash.

CVSS severity5.5
Medium
EPSS probability0.22%
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 netfilter bridge handling allows local users to crash the host through crafted bridged DNAT traffic. The nf_bridge_info structure retains physindev as an unprotected net_device pointer, and a queued packet later restores skb->dev from that pointer after the device can be freed. The path requires local low-privileged access and bridged DNAT traffic with an unresolved ARP neighbor; successful triggering causes a kernel crash.

The record

CVE
CVE-2024-35839
Published
May 17, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 17, 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=4.2
  2. Affected versionversion=c4e70a87d975d1f561a00abfe2d3cefa2a486c95 <544add1f1cfb78c3dfa3e6edcf4668f6be5e730c
  3. Affected versionversion=c4e70a87d975d1f561a00abfe2d3cefa2a486c95 <7ae19ee81ca56b13c50a78de6c47d5b8fdc9d97b
  4. Affected versionversion=c4e70a87d975d1f561a00abfe2d3cefa2a486c95 <9325e3188a9cf3f69fc6f32af59844bbc5b90547
  5. Affected versionversion=c4e70a87d975d1f561a00abfe2d3cefa2a486c95 <9874808878d9eed407e3977fd11fee49de1e1d86

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.2; version=c4e70a87d975d1f561a00abfe2d3cefa2a486c95 <544add1f1cfb78c3dfa3e6edcf4668f6be5e730c; version=c4e70a87d975d1f561a00abfe2d3cefa2a486c95 <7ae19ee81ca56b13c50a78de6c47d5b8fdc9d97b; version=c4e70a87d975d1f561a00abfe2d3cefa2a486c95 <9325e3188a9cf3f69fc6f32af59844bbc5b90547; version=c4e70a87d975d1f561a00abfe2d3cefa2a486c95 <9874808878d9eed407e3977fd11fee49de1e1d86

Published CVSS scores

5.5UbuntuCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

No sourced classifications are available.

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

See the directory against your own environment.

Your stack

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