CVE-2026-68140
net/iucv: fix use-after-free of a severed iucv_path
En bref
- Source
- NVD
- EPSS
- EPSS 0.27 % · centile 20 ()
- État
- PUBLISHED
- Publiée
- Mise à jour
- Attribuée par
- Linux
- Statut NVD
- Received
Description
In the Linux kernel, the following vulnerability has been resolved: net/iucv: fix use-after-free of a severed iucv_path af_iucv queues not-yet-received message notifications on iucv->message_q, each holding a raw pointer to the connection's iucv_path. When the peer severs the connection, iucv_sever_path() frees that path with iucv_path_free() but leaves the notifications queued. A later recvmsg() drains message_q via iucv_process_message_q() and hands the stale path to message_receive() -- a use-after-free of the freed iucv_path. Drop the queued notifications when the path is severed; once the path is gone they can no longer be received. This also frees the notifications leaked when a socket is closed with messages still queued.
Faiblesses (CWE)
- CWE-416 — Utilisation après libération
Références
- https://git.kernel.org/stable/c/5f08c5e50bcb4680069bd3f9edd5728308816ded
- https://git.kernel.org/stable/c/c24faf11bd31bfe0500aca12cbdd5a573a954a5d
- https://git.kernel.org/stable/c/99ddb33748698296a6f17b9b34aa3d16a406bb3c
- https://git.kernel.org/stable/c/23658b350b4107e8292045c2044983fd426fa15d
- https://git.kernel.org/stable/c/a5bbaddf69853117f28173c3f5c8fc14c6b2ec82
- https://git.kernel.org/stable/c/900cd6d8119b7f3ae5c4bf82f922ff5957df43db
- https://git.kernel.org/stable/c/f579582c03ed526281a8450159baf1d35099a85f
- https://git.kernel.org/stable/c/be7cc4656eb1f54029610e82d1f0fdd3f9b5ec0a
Scores
| Version | Score | Vecteur | Évalué par |
|---|---|---|---|
| CVSS 3.1 | HIGH 8.8 | CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H | Linux |
| CVSS 3.1 | HIGH 8.8 | CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H | NVD · 416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Secondary) |
Références européennes
- ENISA EUVD · EUVD-2026-55522
- GCVE · GCVE-0-2026-68140
Avis du CERT-FR
- CERTFR-2026-AVI-1385 — Multiples vulnérabilités dans les produits VMware · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1334 — Multiples vulnérabilités dans le noyau Linux de Red Hat · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1333 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1286 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1163 — Multiples vulnérabilités dans le noyau Linux de Debian LTS · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1069 — Multiples vulnérabilités dans le noyau Linux de Debian LTS · cert.ssi.gouv.fr
Produits affectés
| Produit | Versions |
|---|---|
| Linux · Linux | affected f0703c80e5156406ad947cb67fe277725b48080f < 5f08c5e50bcb4680069bd3f9edd5728308816ded ; affected f0703c80e5156406ad947cb67fe277725b48080f < c24faf11bd31bfe0500aca12cbdd5a573a954a5d ; affected f0703c80e5156406ad947cb67fe277725b48080f < 99ddb33748698296a6f17b9b34aa3d16a406bb3c ; affected f0703c80e5156406ad947cb67fe277725b48080f < 23658b350b4107e8292045c2044983fd426fa15d ; affected f0703c80e5156406ad947cb67fe277725b48080f < a5bbaddf69853117f28173c3f5c8fc14c6b2ec82 ; affected f0703c80e5156406ad947cb67fe277725b48080f < 900cd6d8119b7f3ae5c4bf82f922ff5957df43db |
| Linux · Linux | affected 2.6.24 ; unaffected 0 < 2.6.24 ; unaffected 5.10.265 ≤ 5.10.* ; unaffected 5.15.216 ≤ 5.15.* ; unaffected 6.1.183 ≤ 6.1.* ; unaffected 6.6.148 ≤ 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 |