In the Linux kernel, the following vulnerability has been resolved: net/sched: reject overly deep qdisc hierarchies Deep qdisc hierarch…
CVE-2026-74663 · published 22 Aug 2026
How serious is it
- Severity: high, CVSS score 7.8 out of 10.
- No exploit prediction (EPSS) score yet.
- Not on the CISA list of exploited vulnerabilities.
- No public exploit in Exploit-DB.
Is your app affected by CVE-2026-74663?
Paste this prompt into Claude Code, Cursor or any AI coding tool: it runs a free Shippable scan of your project and fixes what it finds. Built with Lovable, Bolt or v0? Scan your live app. Or upload your package file.
Who is affected
- Linux Linux: 2.6.12
How to check
- Find out whether you run the affected product and which version, then compare it with the versions above.
How to fix
Copies a prompt for Claude Code, Cursor or Codex that asks it to check whether you run this product.
- Apply the vendor's update or mitigation from the references below. If there is none yet, limit exposure of the affected service until there is.
- If a vulnerable version was live, check your logs and rotate the secrets that server could read.
The advisory
In the Linux kernel, the following vulnerability has been resolved:
net/sched: reject overly deep qdisc hierarchies
Deep qdisc hierarchies can lead to excessive recursion in qdisc tree
walkers and exhaust the kernel stack. The existing loop check does not
cover the create-and-graft path, so a hierarchy can still be extended by
creating a new child qdisc below an already deep parent.
Store the hierarchy depth in struct Qdisc and update it when qdiscs are
grafted. Reject new child qdiscs once the parent is already at the maximum
allowed depth.
Check your whole app
Dependencies are only half of it. Free and read-only: before you push, run npx shippable-dev scan localhost:3000 in your project folder, no account needed. For your live app, you prove it's yours with a one-line tag first.
References
- git.kernel.org/stable/c/08dc49df1527b09d9ea225a7265bbf6c237097bf
- git.kernel.org/stable/c/2759acf08a3454866660edcd3ef4e64139f254a6
- git.kernel.org/stable/c/8ca8cdb74939581339e1ae370193c0adb5a85336
- git.kernel.org/stable/c/9f69bb9fdaa2fe64b68bb62fb84d405784bee540
- git.kernel.org/stable/c/a4b14a4df29d36458a943f9b521ddd0f940363cc
- git.kernel.org/stable/c/a627d36c2a94e18c8c105ae68008786dfd85592e
- git.kernel.org/stable/c/dedd34b0f2310e28c5f6d4875cfbf4b7ed821c01
- git.kernel.org/stable/c/e2d658c6427844cee5bc654b436ca68d680b6148
Merged from NVD. Last updated 24 Oct 2026. All vulnerabilities · RSS · JSON