f2fs: use the mount idmap for the owner check in f2fs_xattr_advise_set() (Linux Linux)
At a glance
- Source
- NVD
- EPSS
- EPSS 0.20 % · percentile 10 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- Linux
- NVD status
- Received
Description
In the Linux kernel, the following vulnerability has been resolved: f2fs: use the mount idmap for the owner check in f2fs_xattr_advise_set() f2fs_xattr_advise_set() calls inode_owner_or_capable() with &nop_mnt_idmap before allowing the "system.advise" xattr to be set, instead of the idmap that the VFS passes to the ->set() handler. f2fs supports idmapped mounts, so on such a mount this checks the caller's fsuid against the unmapped on-disk owner rather than the mapped owner: the actual owner can be wrongly denied with -EPERM and an unrelated caller wrongly allowed. Pass the handler's idmap instead.
References
- https://git.kernel.org/stable/c/4c0c610b480cfbc57528aa1acbd6be12ed2a6fb1
- https://git.kernel.org/stable/c/c3e2692c7a58e0bdb84bd658d827e89dcecea3ad
- https://git.kernel.org/stable/c/3b681229e9f8fb1dd29bc65983bf3c87779e4ca3
- https://git.kernel.org/stable/c/ab31e3b774f5d06b4489cef6c297b48c47c9dcbd
- https://git.kernel.org/stable/c/a54ffce4637acb0db8e695188a6c7f99f14c3576
European references
- ENISA EUVD · EUVD-2026-80439
- GCVE · GCVE-0-2026-89839
CERT-FR advisories
- CERTFR-2026-AVI-1385 — Multiples vulnérabilités dans les produits VMware · 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 01beba7957a26f9b7179127e8ad56bb5a0f56138 < 4c0c610b480cfbc57528aa1acbd6be12ed2a6fb1 ; affected 01beba7957a26f9b7179127e8ad56bb5a0f56138 < c3e2692c7a58e0bdb84bd658d827e89dcecea3ad ; affected 01beba7957a26f9b7179127e8ad56bb5a0f56138 < 3b681229e9f8fb1dd29bc65983bf3c87779e4ca3 ; affected 01beba7957a26f9b7179127e8ad56bb5a0f56138 < ab31e3b774f5d06b4489cef6c297b48c47c9dcbd ; affected 01beba7957a26f9b7179127e8ad56bb5a0f56138 < a54ffce4637acb0db8e695188a6c7f99f14c3576 |
| Linux · Linux | affected 6.3 ; unaffected 0 < 6.3 ; unaffected 6.6.157 ≤ 6.6.* ; unaffected 6.12.110 ≤ 6.12.* ; unaffected 6.18.51 ≤ 6.18.* ; unaffected 7.2.5 ≤ 7.2.* |
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 |