smack: fix cred UAF in smack_file_send_sigiotask() (Linux Linux)
En bref
- Source
- NVD
- EPSS
- EPSS 0.13 % · centile 3 ()
- État
- PUBLISHED
- Publiée
- Mise à jour
- Attribuée par
- Linux
- Statut NVD
- Received
Rechercher sur…
Description
In the Linux kernel, the following vulnerability has been resolved: smack: fix cred UAF in smack_file_send_sigiotask() When inspecting the credentials of another task, objective credentials (->real_cred, accessed with __task_cred()) must always be used. Accessing ->cred on a non-current task is forbidden unless that task is being created or destroyed; a task is allowed to change its own ->cred pointer with no synchronization, and changing ->cred should only affect the current syscall. smack_file_send_sigiotask() was accessing both sets of credentials: First tsk->cred, then __task_cred(tsk). Fix it, always access the objective credentials here. I have tested that this bug can lead to a KASAN-reported UAF of struct cred in smack_file_send_sigiotask(), and that this fix prevents the race.
Références
- https://git.kernel.org/stable/c/a512366d84e134a9eefc2cc40eeb6e80e2ec162c
- https://git.kernel.org/stable/c/7c7fe043f3099d0d35002b248967f75e55345b93
- https://git.kernel.org/stable/c/f9c7b1f2b9d8f4176d2632743f51400855978ace
- https://git.kernel.org/stable/c/b5bcf3adfa27279da4401ab8f1e1a706601a92be
- https://git.kernel.org/stable/c/ed64aa505875a3b4defd504ee8e59e1949246a62
- https://git.kernel.org/stable/c/b791401bf389a1546a830d2b381ca60fe94c7870
- https://git.kernel.org/stable/c/fedc88e38ce979a720cd2de042578cb5df3dc8de
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-2026-76251
- GCVE · GCVE-0-2026-80928
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 3b11a1decef07c19443d24ae926982bc8ec9f4c0 < a512366d84e134a9eefc2cc40eeb6e80e2ec162c ; affected 3b11a1decef07c19443d24ae926982bc8ec9f4c0 < 7c7fe043f3099d0d35002b248967f75e55345b93 ; affected 3b11a1decef07c19443d24ae926982bc8ec9f4c0 < f9c7b1f2b9d8f4176d2632743f51400855978ace ; affected 3b11a1decef07c19443d24ae926982bc8ec9f4c0 < b5bcf3adfa27279da4401ab8f1e1a706601a92be ; affected 3b11a1decef07c19443d24ae926982bc8ec9f4c0 < ed64aa505875a3b4defd504ee8e59e1949246a62 ; affected 3b11a1decef07c19443d24ae926982bc8ec9f4c0 < b791401bf389a1546a830d2b381ca60fe94c7870 |
| Linux · Linux | affected 2.6.29 ; unaffected 0 < 2.6.29 ; unaffected 5.15.221 ≤ 5.15.* ; unaffected 6.1.188 ≤ 6.1.* ; unaffected 6.6.157 ≤ 6.6.* ; unaffected 6.12.109 ≤ 6.12.* |
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 |