net/sched: reject overly deep qdisc hierarchies (Linux Linux)
At a glance
- Source
- NVD
- EPSS
- EPSS 0.13 % · percentile 3 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- Linux
- NVD status
- Received
Description
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.
References
- https://git.kernel.org/stable/c/08dc49df1527b09d9ea225a7265bbf6c237097bf
- https://git.kernel.org/stable/c/a627d36c2a94e18c8c105ae68008786dfd85592e
- https://git.kernel.org/stable/c/9f69bb9fdaa2fe64b68bb62fb84d405784bee540
- https://git.kernel.org/stable/c/8ca8cdb74939581339e1ae370193c0adb5a85336
- https://git.kernel.org/stable/c/2759acf08a3454866660edcd3ef4e64139f254a6
- https://git.kernel.org/stable/c/a4b14a4df29d36458a943f9b521ddd0f940363cc
- https://git.kernel.org/stable/c/e2d658c6427844cee5bc654b436ca68d680b6148
- https://git.kernel.org/stable/c/dedd34b0f2310e28c5f6d4875cfbf4b7ed821c01
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | HIGH 7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H | Linux |
| CVSS 3.1 | HIGH 7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H | NVD · 416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Secondary) |
European references
- ENISA EUVD · EUVD-2026-64350
- GCVE · GCVE-0-2026-74663
CERT-FR advisories
- CERTFR-2026-AVI-1372 — Multiples vulnérabilités dans les produits SUSE · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1335 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1286 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1232 — Multiples vulnérabilités dans le noyau Linux de Debian LTS · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1163 — Multiples vulnérabilités dans le noyau Linux de Debian LTS · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1090 — Multiples vulnérabilités dans le noyau Linux de Debian · cert.ssi.gouv.fr
Affected products
| Product | Versions |
|---|---|
| Linux · Linux | affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 08dc49df1527b09d9ea225a7265bbf6c237097bf ; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < a627d36c2a94e18c8c105ae68008786dfd85592e ; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 9f69bb9fdaa2fe64b68bb62fb84d405784bee540 ; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 8ca8cdb74939581339e1ae370193c0adb5a85336 ; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 2759acf08a3454866660edcd3ef4e64139f254a6 ; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < a4b14a4df29d36458a943f9b521ddd0f940363cc |
| Linux · Linux | affected 2.6.12 ; unaffected 0 < 2.6.12 ; unaffected 5.10.267 ≤ 5.10.* ; unaffected 5.15.218 ≤ 5.15.* ; unaffected 6.1.183 ≤ 6.1.* ; unaffected 6.6.152 ≤ 6.6.* |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| CERT-FR (ANSSI) | Licence Ouverte / Etalab 2.0 |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |