net: bridge: Reject descending VLAN tunnel ranges (Linux Linux)
At a glance
- Source
- NVD
- EPSS
- EPSS 0.22 % · percentile 12 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- Linux
- NVD status
- Received
Description
In the Linux kernel, the following vulnerability has been resolved: net: bridge: Reject descending VLAN tunnel ranges A pair of descending VLAN and tunnel IDs can pass the tunnel range span check. The VLAN subtraction produces a negative int, which is converted to unsigned when compared with the u32 tunnel ID subtraction. It can therefore equal the wrapped tunnel ID delta. The range loop then performs no iterations. Since the batched notification handling added a post-loop error check, this leaves err uninitialized and makes the request's return value unpredictable. Reject descending VLAN ranges before comparing the spans. Valid ascending and single-entry ranges remain unchanged, while malformed descending ranges consistently return -EINVAL. This issue was found by a static analysis checker and confirmed by manual source review.
References
- https://git.kernel.org/stable/c/1181f6bad009408a259bab6aaf0681f11b487972
- https://git.kernel.org/stable/c/5a8e0e3a18b5e3172343b8479c5d04187f5b4795
- https://git.kernel.org/stable/c/0874a6d5275091429ec4c675c54c53a8776665ae
- https://git.kernel.org/stable/c/4b0f5b25f114651f03058395b490626c4444875e
- https://git.kernel.org/stable/c/bd741b819ff1c239d26cc5b0f0e6b1fd4e67ed17
- https://git.kernel.org/stable/c/c0444d7499f113d6b7803ef0175591464e17525e
- https://git.kernel.org/stable/c/434849b21ef56b09d16e6366b2a230002f363e45
- https://git.kernel.org/stable/c/b74a072d8fb71d3c9ffba4a17d5943e63266fb38
European references
- ENISA EUVD · EUVD-2026-81707
- GCVE · GCVE-0-2026-90114
CERT-FR advisories
- 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
Affected products
| Product | Versions |
|---|---|
| Linux · Linux | affected 94339443686b36d3223bc032b7947267474e2679 < 1181f6bad009408a259bab6aaf0681f11b487972 ; affected 94339443686b36d3223bc032b7947267474e2679 < 5a8e0e3a18b5e3172343b8479c5d04187f5b4795 ; affected 94339443686b36d3223bc032b7947267474e2679 < 0874a6d5275091429ec4c675c54c53a8776665ae ; affected 94339443686b36d3223bc032b7947267474e2679 < 4b0f5b25f114651f03058395b490626c4444875e ; affected 94339443686b36d3223bc032b7947267474e2679 < bd741b819ff1c239d26cc5b0f0e6b1fd4e67ed17 ; affected 94339443686b36d3223bc032b7947267474e2679 < c0444d7499f113d6b7803ef0175591464e17525e |
| Linux · Linux | affected 5.9 ; unaffected 0 < 5.9 ; 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 |