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CVE-2026-80630

9.8 · CRITICAL
Published Aug 28, 2026

Overview

CVE-2026-80630 is a critical-severity vulnerability. It was published on August 28, 2026 and has a CVSS 3.1 base score of 9.8 (CRITICAL).

This vulnerability has a CVSS 3.1 base score of 9.8, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical Description

In the Linux kernel, the following vulnerability has been resolved:

net/sched: sch_fq_codel: Do not call qdisc_tree_reduce_backlog during peek before restoring qlen

Whenever fq_codel drops packets during peek, it calls

qdisc_tree_reduce_backlog. An issue arises because it calls

qdisc_tree_reduce_backlog before it reincrements the qlen. If qlen drops

to zero, but peek returns an skb, the parent's qlen_notify callback will be

executed even though fq_codel still has 1 packet on the queue and, thus,

will mistakenly deactivate the parent's class causing issues like a recent

report [1] and a wild memory access in qfq:

[ 29.371146][ T360] Oops: general protection fault, probably for non-canonical address 0xfbd59c0000000024: 0000 [#1] SMP KASAN NOPTI

[ 29.371666][ T360] KASAN: maybe wild-memory-access in range [0xdead000000000120-0xdead000000000127]

[ 29.371987][ T360] CPU: 6 UID: 0 PID: 360 Comm: tc Not tainted 7.1.0-rc5-00285-gc530e5b2dbc6-dirty #82 PREEMPT(full)

[ 29.372384][

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Ref git.kernel.org/stable/c/0500af8630c3253f0dde879bd3a73a06bb2f2b3f Ref git.kernel.org/stable/c/097f6fc7b1ae362dd7a9444b2572162fda73b284 Ref git.kernel.org/stable/c/20dd591d8f951e1e6aca5052be8785e6181055e2 Ref git.kernel.org/stable/c/3e515188393e62a718ccebee651ee74514104ff6 Ref git.kernel.org/stable/c/7c09843fd2b44d9bf0de798683861d1aecd62a08 Ref git.kernel.org/stable/c/94a5f1efdefb01f82cd228bf4e7ef1e8fc075c80 Ref git.kernel.org/stable/c/acc08a0c7f37ebb1901144e03a7cba7d4afd9203 Ref git.kernel.org/stable/c/af54df2f44d9605614bc7ed96640302a240a9a62

Frequently Asked Questions

What is CVE-2026-80630?

CVE-2026-80630 is a critical-severity vulnerability. It was published on August 28, 2026 and has a CVSS 3.1 base score of 9.8 (CRITICAL).

How severe is CVE-2026-80630?

This vulnerability has a CVSS 3.1 base score of 9.8, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-80630?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-80630?

CyberStrike's AI-powered security agents can automatically detect CVE-2026-80630 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.

How CyberStrike Helps

Autonomous Discovery

AI agents map your attack surface to find vulnerabilities like this one.
Continuous Pentesting

Automated penetration testing that runs continuously, not just quarterly.
Code Review

AI-driven PR review catches vulnerable dependencies before they ship.
HackBrowser

Browser-based exploitation validates findings with real proof-of-concept.

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