selinux,smack: don't bypass permissions check in inode_setsecctx hook (Linux Linux)
At a glance
- Source
- NVD
- EPSS
- EPSS 0.53 % · percentile 45 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- Linux
- NVD status
- Modified
Description
In the Linux kernel, the following vulnerability has been resolved: selinux,smack: don't bypass permissions check in inode_setsecctx hook Marek Gresko reports that the root user on an NFS client is able to change the security labels on files on an NFS filesystem that is exported with root squashing enabled. The end of the kerneldoc comment for __vfs_setxattr_noperm() states: * This function requires the caller to lock the inode's i_mutex before it * is executed. It also assumes that the caller will make the appropriate * permission checks. nfsd_setattr() does do permissions checking via fh_verify() and nfsd_permission(), but those don't do all the same permissions checks that are done by security_inode_setxattr() and its related LSM hooks do. Since nfsd_setattr() is the only consumer of security_inode_setsecctx(), simplest solution appears to be to replace the call to __vfs_setxattr_noperm() with a call to __vfs_setxattr_locked(). This fixes the above issue and has the added benefit of causing nfsd to recall conflicting delegations on a file when a client tries to change its security label.
Weaknesses (CWE)
- CWE-276 — Incorrect Default Permissions
References
- https://git.kernel.org/stable/c/2dbc4b7bac60b02cc6e70d05bf6a7dfd551f9dda
- https://git.kernel.org/stable/c/fe0cd53791119f6287b6532af8ce41576d664930
- https://git.kernel.org/stable/c/eebec98791d0137e455cc006411bb92a54250924
- https://git.kernel.org/stable/c/459584258d47ec3cc6245a82e8a49c9d08eb8b57
- https://git.kernel.org/stable/c/f71ec019257ba4f7ab198bd948c5902a207bad96
- https://git.kernel.org/stable/c/76a0e79bc84f466999fa501fce5bf7a07641b8a7
- https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html
- https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | CRITICAL 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H | Linux |
| CVSS 3.1 | CRITICAL 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H | NVD · 416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Secondary) |
| CVSS 3.1 | MEDIUM 4.4 | CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N | NVD · nvd@nist.gov (Primary) |
European references
- ENISA EUVD · EUVD-2024-41956
- GCVE · GCVE-0-2024-46695
CERT-FR advisories
- CERTFR-2026-AVI-1165 — Multiples vulnérabilités dans les produits IBM · cert.ssi.gouv.fr
- CERTFR-2025-AVI-0255 — Multiples vulnérabilités dans les produits IBM · cert.ssi.gouv.fr
- CERTFR-2025-AVI-0184 — Multiples vulnérabilités dans le noyau Linux de Debian LTS · cert.ssi.gouv.fr
- CERTFR-2025-AVI-0153 — Multiples vulnérabilités dans le noyau Linux de Red Hat · cert.ssi.gouv.fr
- CERTFR-2025-AVI-0069 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2025-AVI-0022 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2025-AVI-0002 — Multiples vulnérabilités dans le noyau Linux de Debian LTS · cert.ssi.gouv.fr
- CERTFR-2024-AVI-1108 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2024-AVI-1101 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2024-AVI-1080 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2024-AVI-1078 — Multiples vulnérabilités dans le noyau Linux de Red Hat · cert.ssi.gouv.fr
- CERTFR-2024-AVI-0870 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
Affected configurations (NVD CPE)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*< 6.6.49cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 6.7 < 6.10.8cpe:2.3:o:linux:linux_kernel:6.11:rc1:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:6.11:rc2:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:6.11:rc3:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:6.11:rc4:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:6.11:rc5:*:*:*:*:*:*
Affected products
| Product | Versions |
|---|---|
| Linux · Linux | affected 18032ca062e621e15683cb61c066ef3dc5414a7b < 2dbc4b7bac60b02cc6e70d05bf6a7dfd551f9dda ; affected 18032ca062e621e15683cb61c066ef3dc5414a7b < fe0cd53791119f6287b6532af8ce41576d664930 ; affected 18032ca062e621e15683cb61c066ef3dc5414a7b < eebec98791d0137e455cc006411bb92a54250924 ; affected 18032ca062e621e15683cb61c066ef3dc5414a7b < 459584258d47ec3cc6245a82e8a49c9d08eb8b57 ; affected 18032ca062e621e15683cb61c066ef3dc5414a7b < f71ec019257ba4f7ab198bd948c5902a207bad96 ; affected 18032ca062e621e15683cb61c066ef3dc5414a7b < 76a0e79bc84f466999fa501fce5bf7a07641b8a7 |
| Linux · Linux | affected 3.11 ; unaffected 0 < 3.11 ; unaffected 5.10.227 ≤ 5.10.* ; unaffected 5.15.168 ≤ 5.15.* ; unaffected 6.1.113 ≤ 6.1.* ; unaffected 6.6.49 ≤ 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 |