Bluetooth: L2CAP: fix chan mode for LE_CONN_REQ + EXT_FLOWCTL pchan (Linux Linux)
En bref
- Source
- NVD
- EPSS
- EPSS 0.24 % · centile 15 ()
- État
- PUBLISHED
- Publiée
- Mise à jour
- Attribuée par
- Linux
- Statut NVD
- Undergoing Analysis
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Description
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: L2CAP: fix chan mode for LE_CONN_REQ + EXT_FLOWCTL pchan l2cap_new_connection() sets default value of channel mode to match the parent channel. l2cap_le_connect_req() left this at the default, and created L2CAP_MODE_EXT_FLOWCTL channels if listening pchan has that mode. This causes FLAG_DEFER_SETUP channels to reply to L2CAP_LE_CONN_REQ with L2CAP_ECRED_CONN_RSP, which is incorrect. It can also result to stack OOB write (of l2cap_alloc_cid determined values) in l2cap_ecred_rsp_defer(), as l2cap_le_connect_req() does not limit maximum number of deferred channels or check for duplicate ident. Fix by setting chan->mode correctly in l2cap_le_connect_req(). Also check channel mode in l2cap_ecred_rsp_defer(), and do WARN_ON_ONCE instead of OOB write to make it less brittle.
Références
- https://git.kernel.org/stable/c/ad0f44a3f1f688558ed876a0702bc2c82b0df689
- https://git.kernel.org/stable/c/564ae0e05e598aa895b9dbd18cb7d6eb64752869
- https://git.kernel.org/stable/c/aab17938998b29e75c3324763411aef3e300fc67
- https://git.kernel.org/stable/c/0e1fc7cab95ad958e55d70a5dfaaea687c9c639f
- https://git.kernel.org/stable/c/1074bcc57f741223f9fa82ce6afe5c3d783e4d10
- https://git.kernel.org/stable/c/5d5a625cbc854d4c4f68e4b16fcf6e682d9a9ed1
- https://git.kernel.org/stable/c/6cb79e6499228cfdbd4b3301371ce74d01cd2f80
- https://git.kernel.org/stable/c/4ef05db5b08b176a551b4a6287372045998806b0
Scores
| Version | Score | Vecteur | Évalué par |
|---|---|---|---|
| CVSS 3.1 | HIGH 7.5 | CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H | Linux |
| CVSS 3.1 | HIGH 7.5 | CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H | NVD · 416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Secondary) |
Références européennes
- ENISA EUVD · EUVD-2026-86939
- GCVE · GCVE-0-2026-98108
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 15f02b91056253e8cdc592888f431da0731337b8 < ad0f44a3f1f688558ed876a0702bc2c82b0df689 ; affected 15f02b91056253e8cdc592888f431da0731337b8 < 564ae0e05e598aa895b9dbd18cb7d6eb64752869 ; affected 15f02b91056253e8cdc592888f431da0731337b8 < aab17938998b29e75c3324763411aef3e300fc67 ; affected 15f02b91056253e8cdc592888f431da0731337b8 < 0e1fc7cab95ad958e55d70a5dfaaea687c9c639f ; affected 15f02b91056253e8cdc592888f431da0731337b8 < 1074bcc57f741223f9fa82ce6afe5c3d783e4d10 ; affected 15f02b91056253e8cdc592888f431da0731337b8 < 5d5a625cbc854d4c4f68e4b16fcf6e682d9a9ed1 |
| Linux · Linux | affected 5.7 ; unaffected 0 < 5.7 ; unaffected 5.10.271 ≤ 5.10.* ; unaffected 5.15.222 ≤ 5.15.* ; unaffected 6.1.189 ≤ 6.1.* ; unaffected 6.6.158 ≤ 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 |