CVE-2026-72035Network attack vector

Kernel panic via orphaned peeked packet

Published Aug 15, 2026 · Updated Aug 15, 2026

NULL pointer dereference in the Linux kernel allows remote attackers to panic affected hosts through ordinary egress traffic. The taprio software dequeue path calls a child qdisc directly after peek, ignoring the packet stashed in gso_skb and desynchronizing qlen and backlog before QFQ re-enters an empty list. Exposure requires a preconfigured taprio hierarchy with a non-work-conserving QFQ child on the software path; triggering traffic then causes a kernel panic without host credentials.

CVSS severity8.2
High
EPSS probability0.57%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

NULL pointer dereference in the Linux kernel allows remote attackers to panic affected hosts through ordinary egress traffic. The taprio software dequeue path calls a child qdisc directly after peek, ignoring the packet stashed in gso_skb and desynchronizing qlen and backlog before QFQ re-enters an empty list. Exposure requires a preconfigured taprio hierarchy with a non-work-conserving QFQ child on the software path; triggering traffic then causes a kernel panic without host credentials.

The record

CVE
CVE-2026-72035
Published
Aug 15, 2026
Updated
Aug 15, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-476, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 15, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 15, 2026Record 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=4.20
  2. Affected versionversion=5a781ccbd19e4664babcbe4b4ead7aa2b9283d22 <18d580cb00c55805633bae45e90cf22ed6b8e424
  3. Affected versionversion=5a781ccbd19e4664babcbe4b4ead7aa2b9283d22 <2dcebbd1ad2e180fe7b98bf346ced69a872e11e6
  4. Affected versionversion=5a781ccbd19e4664babcbe4b4ead7aa2b9283d22 <6ee5a7665a9080bcb05d703bf981a579436fd05e
  5. Affected versionversion=5a781ccbd19e4664babcbe4b4ead7aa2b9283d22 <e056e1dfcddca877dd46d704e8ec9860cfc9ec44
  6. Affected versionversion=5a781ccbd19e4664babcbe4b4ead7aa2b9283d22 <e2b7ee61989f2d39df6c2cc06f9db1aea69bdb09

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.20; version=5a781ccbd19e4664babcbe4b4ead7aa2b9283d22 <18d580cb00c55805633bae45e90cf22ed6b8e424; version=5a781ccbd19e4664babcbe4b4ead7aa2b9283d22 <2dcebbd1ad2e180fe7b98bf346ced69a872e11e6; version=5a781ccbd19e4664babcbe4b4ead7aa2b9283d22 <6ee5a7665a9080bcb05d703bf981a579436fd05e; version=5a781ccbd19e4664babcbe4b4ead7aa2b9283d22 <e056e1dfcddca877dd46d704e8ec9860cfc9ec44; version=5a781ccbd19e4664babcbe4b4ead7aa2b9283d22 <e2b7ee61989f2d39df6c2cc06f9db1aea69bdb09

Published CVSS scores

8.2Linux kernel CVE teamCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H
5.5Red HatCVSS: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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-476NULL Pointer Dereference
T1499.004Application or System Exploitation

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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