net: cap advertised IP tunnel headroom (Linux Linux)
En bref
- Source
- NVD
- EPSS
- EPSS 0.13 % · centile 3 ()
- État
- PUBLISHED
- Publiée
- Mise à jour
- Attribuée par
- Linux
- Statut NVD
- Received
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Description
In the Linux kernel, the following vulnerability has been resolved: net: cap advertised IP tunnel headroom IP tunnel devices derive their advertised needed_headroom from lower output devices. A stack of user-created devices can make the derived value larger than the 16-bit skb header offsets can represent. Once IP output reserves it, skb head expansion can wrap those offsets. The runtime transmit path already caps a growing needed_headroom at 512. Apply the same cap when tunnel configuration publishes needed_headroom derived from a lower output device. Capping the advertised value is safe: IP tunnel transmit still expands the skb when a packet needs more headroom. A nonsensical stacked configuration can therefore incur an extra reallocation, but it cannot publish an unbounded reservation to upper layers.
Références
- https://git.kernel.org/stable/c/fb889a619723032140f5d983a3a34d25a5a2bed4
- https://git.kernel.org/stable/c/b160422f8103574425e2834130e169d84c94fa1d
- https://git.kernel.org/stable/c/d36e75f5669140b66515ad3a176ca6337bd80a5e
- https://git.kernel.org/stable/c/84783961cb8bdb36b4f41a02ce43aafc6d52b176
- https://git.kernel.org/stable/c/bc4e05ae66c9797a0972ac44326e69c5305e0020
- https://git.kernel.org/stable/c/af0ee8f04bea22cdb331fa3509e17f81b48938ad
- https://git.kernel.org/stable/c/9144f2c53a04465a6878172b523f640313c5559e
- https://git.kernel.org/stable/c/6b222adeb9340306e2ff97127c76117abb9b3df8
Scores
| Version | Score | Vecteur | Évalué par |
|---|---|---|---|
| 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) |
Références européennes
- ENISA EUVD · EUVD-2026-76301
- GCVE · GCVE-0-2026-80978
Avis du CERT-FR
- CERTFR-2026-AVI-1385 — Multiples vulnérabilités dans les produits VMware · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1375 — Multiples vulnérabilités dans le noyau Linux de Debian LTS · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1289 — Multiples vulnérabilités dans le noyau Linux de Debian LTS · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1253 — Multiples vulnérabilités dans le noyau Linux de Debian · cert.ssi.gouv.fr
Produits affectés
| Produit | Versions |
|---|---|
| Linux · Linux | affected 1a37e412a0225fcba5587f24c0dfc7636efc8b69 < fb889a619723032140f5d983a3a34d25a5a2bed4 ; affected 1a37e412a0225fcba5587f24c0dfc7636efc8b69 < b160422f8103574425e2834130e169d84c94fa1d ; affected 1a37e412a0225fcba5587f24c0dfc7636efc8b69 < d36e75f5669140b66515ad3a176ca6337bd80a5e ; affected 1a37e412a0225fcba5587f24c0dfc7636efc8b69 < 84783961cb8bdb36b4f41a02ce43aafc6d52b176 ; affected 1a37e412a0225fcba5587f24c0dfc7636efc8b69 < bc4e05ae66c9797a0972ac44326e69c5305e0020 ; affected 1a37e412a0225fcba5587f24c0dfc7636efc8b69 < af0ee8f04bea22cdb331fa3509e17f81b48938ad |
| Linux · Linux | affected 3.11 ; unaffected 0 < 3.11 ; unaffected 5.10.270 ≤ 5.10.* ; unaffected 5.15.221 ≤ 5.15.* ; unaffected 6.1.188 ≤ 6.1.* ; unaffected 6.6.157 ≤ 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 |