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7.8
HIGH CVSS 3.1
CVE-2026-72036
net/sched: sch_multiq: Replace direct dequeue call with peek and qdisc_dequeue_peeked
Overview
Description

In the Linux kernel, the following vulnerability has been resolved: net/sched: sch_multiq: Replace direct dequeue call with peek and qdisc_dequeue_peeked multiq_dequeue() takes a packet from a band's child with a direct ->dequeue() call after multiq_peek() peeked it. When the child is non-work-conserving the peek stashes the skb in the child's gso_skb, so the direct dequeue returns a different skb and orphans the stash, desyncing the child's qlen/backlog. With a qfq child reached through a peeking parent (e.g. tbf) this re-enters the child on an emptied list and dereferences NULL, panicking the kernel from softirq on ordinary egress. Take the packet through qdisc_dequeue_peeked(), as sch_prio already does and as sch_red and sch_sfb were just fixed to do. The helper is a no-op when the child has no stash, so a work-conserving child is unaffected.

Details
INFO

Published Date :

Aug. 15, 2026, 6:21 a.m.

Last Modified :

Aug. 17, 2026, 6:18 a.m.

Remotely Exploit :

No

Source :

416baaa9-dc9f-4396-8d5f-8c081fb06d67
Impact
Affected Products

The following products are affected by CVE-2026-72036 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Linux linux_kernel
: Total Affected Vendor : 1 | Products : 1
Scoring
CVSS Scores
The Common Vulnerability Scoring System is a standardized framework for assessing the severity of vulnerabilities in software and systems. We collect and displays CVSS scores from various sources for each CVE.
Score Version Severity Vector Exploitability Score Impact Score Source
CVSS 3.1 HIGH 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Solution
Apply Linux kernel patches to fix sch_multiq memory corruption.
  • Update the Linux kernel to the latest version.
  • Apply vendor-provided security patches.
  • Reboot the system after updates.
References
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2026-72036.

URL Resource
https://git.kernel.org/stable/c/1b9cc255e8089606b92b2adf504e334573682821
https://git.kernel.org/stable/c/3e5fd9d14f2d228e7260251f2e4a1d41ba8f705a
https://git.kernel.org/stable/c/54f6b0c843e228d499eb4b6bbb89df68cad9ad5d
https://git.kernel.org/stable/c/5889064919a1e5c0a9469c54895000414fc46944
https://git.kernel.org/stable/c/7a5a1582710981ef6637de9f074a60a5b1d63222
https://git.kernel.org/stable/c/86a61e46a1919e8abf4d227c204773dabb24068a
https://git.kernel.org/stable/c/eb1a9637f0bd84b5db8803af65dfb1f44785406f
https://git.kernel.org/stable/c/fffeb2ab5eeb823d4c2330571a098f63237c9049
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-72036 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-72036 weaknesses.

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2026-72036 vulnerability anywhere in the article.

Results are limited to the first 20 news articles due to potential performance issues.

The following table lists the changes that have been made to the CVE-2026-72036 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    Aug. 17, 2026

    Action Type Old Value New Value
    Added CVSS V3.1 AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
    Changed Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '77be155cba4e163e8bba9fd27222a8b6189ec4f7', 'lessThan': '3e5fd9d14f2d228e7260251f2e4a1d41ba8f705a', 'versionType': 'git'}, {'status': 'affected', 'version': '77be155cba4e163e8bba9fd27222a8b6189ec4f7', 'lessThan': 'eb1a9637f0bd84b5db8803af65dfb1f44785406f', 'versionType': 'git'}, {'status': 'affected', 'version': '77be155cba4e163e8bba9fd27222a8b6189ec4f7', 'lessThan': '7a5a1582710981ef6637de9f074a60a5b1d63222', 'versionType': 'git'}, {'status': 'affected', 'version': '77be155cba4e163e8bba9fd27222a8b6189ec4f7', 'lessThan': '86a61e46a1919e8abf4d227c204773dabb24068a', 'versionType': 'git'}, {'status': 'affected', 'version': '77be155cba4e163e8bba9fd27222a8b6189ec4f7', 'lessThan': '1b9cc255e8089606b92b2adf504e334573682821', 'versionType': 'git'}, {'status': 'affected', 'version': '77be155cba4e163e8bba9fd27222a8b6189ec4f7', 'lessThan': '5889064919a1e5c0a9469c54895000414fc46944', 'versionType': 'git'}, {'status': 'affected', 'version': '77be155cba4e163e8bba9fd27222a8b6189ec4f7', 'lessThan': 'fffeb2ab5eeb823d4c2330571a098f63237c9049', 'versionType': 'git'}, {'status': 'affected', 'version': '77be155cba4e163e8bba9fd27222a8b6189ec4f7', 'lessThan': '54f6b0c843e228d499eb4b6bbb89df68cad9ad5d', 'versionType': 'git'}], 'programFiles': ['net/sched/sch_multiq.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '2.6.29'}, {'status': 'unaffected', 'version': '0', 'lessThan': '2.6.29', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '5.10.261', 'versionType': 'semver', 'lessThanOrEqual': '5.10.*'}, {'status': 'unaffected', 'version': '5.15.212', 'versionType': 'semver', 'lessThanOrEqual': '5.15.*'}, {'status': 'unaffected', 'version': '6.1.178', 'versionType': 'semver', 'lessThanOrEqual': '6.1.*'}, {'status': 'unaffected', 'version': '6.6.145', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.97', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.40', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.5', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc2', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['net/sched/sch_multiq.c'], 'defaultStatus': 'affected'}] [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '77be155cba4e163e8bba9fd27222a8b6189ec4f7', 'lessThan': '3e5fd9d14f2d228e7260251f2e4a1d41ba8f705a', 'versionType': 'git'}, {'status': 'affected', 'version': '77be155cba4e163e8bba9fd27222a8b6189ec4f7', 'lessThan': 'eb1a9637f0bd84b5db8803af65dfb1f44785406f', 'versionType': 'git'}, {'status': 'affected', 'version': '77be155cba4e163e8bba9fd27222a8b6189ec4f7', 'lessThan': '7a5a1582710981ef6637de9f074a60a5b1d63222', 'versionType': 'git'}, {'status': 'affected', 'version': '77be155cba4e163e8bba9fd27222a8b6189ec4f7', 'lessThan': '86a61e46a1919e8abf4d227c204773dabb24068a', 'versionType': 'git'}, {'status': 'affected', 'version': '77be155cba4e163e8bba9fd27222a8b6189ec4f7', 'lessThan': '1b9cc255e8089606b92b2adf504e334573682821', 'versionType': 'git'}, {'status': 'affected', 'version': '77be155cba4e163e8bba9fd27222a8b6189ec4f7', 'lessThan': '5889064919a1e5c0a9469c54895000414fc46944', 'versionType': 'git'}, {'status': 'affected', 'version': '77be155cba4e163e8bba9fd27222a8b6189ec4f7', 'lessThan': 'fffeb2ab5eeb823d4c2330571a098f63237c9049', 'versionType': 'git'}, {'status': 'affected', 'version': '77be155cba4e163e8bba9fd27222a8b6189ec4f7', 'lessThan': '54f6b0c843e228d499eb4b6bbb89df68cad9ad5d', 'versionType': 'git'}], 'programFiles': ['net/sched/sch_multiq.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '2.6.29'}, {'status': 'unaffected', 'version': '0', 'lessThan': '2.6.29', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '5.10.261', 'versionType': 'semver', 'lessThanOrEqual': '5.10.*'}, {'status': 'unaffected', 'version': '5.15.212', 'versionType': 'semver', 'lessThanOrEqual': '5.15.*'}, {'status': 'unaffected', 'version': '6.1.178', 'versionType': 'semver', 'lessThanOrEqual': '6.1.*'}, {'status': 'unaffected', 'version': '6.6.145', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.97', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.40', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.5', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['net/sched/sch_multiq.c'], 'defaultStatus': 'affected'}]
  • New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    Aug. 15, 2026

    Action Type Old Value New Value
    Added Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '77be155cba4e163e8bba9fd27222a8b6189ec4f7', 'lessThan': '3e5fd9d14f2d228e7260251f2e4a1d41ba8f705a', 'versionType': 'git'}, {'status': 'affected', 'version': '77be155cba4e163e8bba9fd27222a8b6189ec4f7', 'lessThan': 'eb1a9637f0bd84b5db8803af65dfb1f44785406f', 'versionType': 'git'}, {'status': 'affected', 'version': '77be155cba4e163e8bba9fd27222a8b6189ec4f7', 'lessThan': '7a5a1582710981ef6637de9f074a60a5b1d63222', 'versionType': 'git'}, {'status': 'affected', 'version': '77be155cba4e163e8bba9fd27222a8b6189ec4f7', 'lessThan': '86a61e46a1919e8abf4d227c204773dabb24068a', 'versionType': 'git'}, {'status': 'affected', 'version': '77be155cba4e163e8bba9fd27222a8b6189ec4f7', 'lessThan': '1b9cc255e8089606b92b2adf504e334573682821', 'versionType': 'git'}, {'status': 'affected', 'version': '77be155cba4e163e8bba9fd27222a8b6189ec4f7', 'lessThan': '5889064919a1e5c0a9469c54895000414fc46944', 'versionType': 'git'}, {'status': 'affected', 'version': '77be155cba4e163e8bba9fd27222a8b6189ec4f7', 'lessThan': 'fffeb2ab5eeb823d4c2330571a098f63237c9049', 'versionType': 'git'}, {'status': 'affected', 'version': '77be155cba4e163e8bba9fd27222a8b6189ec4f7', 'lessThan': '54f6b0c843e228d499eb4b6bbb89df68cad9ad5d', 'versionType': 'git'}], 'programFiles': ['net/sched/sch_multiq.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '2.6.29'}, {'status': 'unaffected', 'version': '0', 'lessThan': '2.6.29', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '5.10.261', 'versionType': 'semver', 'lessThanOrEqual': '5.10.*'}, {'status': 'unaffected', 'version': '5.15.212', 'versionType': 'semver', 'lessThanOrEqual': '5.15.*'}, {'status': 'unaffected', 'version': '6.1.178', 'versionType': 'semver', 'lessThanOrEqual': '6.1.*'}, {'status': 'unaffected', 'version': '6.6.145', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.97', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.40', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.5', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc2', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['net/sched/sch_multiq.c'], 'defaultStatus': 'affected'}]
    Added Description In the Linux kernel, the following vulnerability has been resolved: net/sched: sch_multiq: Replace direct dequeue call with peek and qdisc_dequeue_peeked multiq_dequeue() takes a packet from a band's child with a direct ->dequeue() call after multiq_peek() peeked it. When the child is non-work-conserving the peek stashes the skb in the child's gso_skb, so the direct dequeue returns a different skb and orphans the stash, desyncing the child's qlen/backlog. With a qfq child reached through a peeking parent (e.g. tbf) this re-enters the child on an emptied list and dereferences NULL, panicking the kernel from softirq on ordinary egress. Take the packet through qdisc_dequeue_peeked(), as sch_prio already does and as sch_red and sch_sfb were just fixed to do. The helper is a no-op when the child has no stash, so a work-conserving child is unaffected.
    Added Reference https://git.kernel.org/stable/c/1b9cc255e8089606b92b2adf504e334573682821
    Added Reference https://git.kernel.org/stable/c/3e5fd9d14f2d228e7260251f2e4a1d41ba8f705a
    Added Reference https://git.kernel.org/stable/c/54f6b0c843e228d499eb4b6bbb89df68cad9ad5d
    Added Reference https://git.kernel.org/stable/c/5889064919a1e5c0a9469c54895000414fc46944
    Added Reference https://git.kernel.org/stable/c/7a5a1582710981ef6637de9f074a60a5b1d63222
    Added Reference https://git.kernel.org/stable/c/86a61e46a1919e8abf4d227c204773dabb24068a
    Added Reference https://git.kernel.org/stable/c/eb1a9637f0bd84b5db8803af65dfb1f44785406f
    Added Reference https://git.kernel.org/stable/c/fffeb2ab5eeb823d4c2330571a098f63237c9049
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CVSS
Vulnerability Scoring Details
Base CVSS Score: 7.8
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact