fs: export anon_inode_make_secure_inode() and fix secretmem LSM bypass (Linux Linux)

CVE-2025-38396
HIGH 7.8

En bref

Source
NVD
EPSS
EPSS 0.20 % · centile 10 ()
État
PUBLISHED
Publiée
Mise à jour
Attribuée par
Linux
Statut NVD
Modified

Description

In the Linux kernel, the following vulnerability has been resolved: fs: export anon_inode_make_secure_inode() and fix secretmem LSM bypass Export anon_inode_make_secure_inode() to allow KVM guest_memfd to create anonymous inodes with proper security context. This replaces the current pattern of calling alloc_anon_inode() followed by inode_init_security_anon() for creating security context manually. This change also fixes a security regression in secretmem where the S_PRIVATE flag was not cleared after alloc_anon_inode(), causing LSM/SELinux checks to be bypassed for secretmem file descriptors. As guest_memfd currently resides in the KVM module, we need to export this symbol for use outside the core kernel. In the future, guest_memfd might be moved to core-mm, at which point the symbols no longer would have to be exported. When/if that happens is still unclear.

Références

Scores

VersionScoreVecteurÉvalué par
CVSS 3.1HIGH 7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HLinux
CVSS 3.1HIGH 7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HNVD · 416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Secondary)
CVSS 3.1HIGH 7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HNVD · nvd@nist.gov (Primary)

Références européennes

Avis du CERT-FR

Configurations affectées (CPE NVD)

Produits affectés

ProduitVersions
Linux · Linuxaffected 2bfe15c5261212130f1a71f32a300bcf426443d4 < 66d29d757c968d2bee9124816da5d718eb352959 ; affected 2bfe15c5261212130f1a71f32a300bcf426443d4 < e3eed01347721cd7a8819568161c91d538fbf229 ; affected 2bfe15c5261212130f1a71f32a300bcf426443d4 < f94c422157f3e43dd31990567b3e5d54b3e5b32b ; affected 2bfe15c5261212130f1a71f32a300bcf426443d4 < 6ca45ea48530332a4ba09595767bd26d3232743b ; affected 2bfe15c5261212130f1a71f32a300bcf426443d4 < cbe4134ea4bc493239786220bd69cb8a13493190
Linux · Linuxaffected 6.0 ; unaffected 0 < 6.0 ; unaffected 6.1.146 ≤ 6.1.* ; unaffected 6.6.97 ≤ 6.6.* ; unaffected 6.12.37 ≤ 6.12.* ; unaffected 6.15.6 ≤ 6.15.*

Sources

SourceLicence
CVE List (CVEProject cvelistV5)CVE Program Terms of Use
EPSS (FIRST.org)FIRST — attribution requested
ENISA EUVDENISA — reproduction authorised, source acknowledged
CERT-FR (ANSSI)Licence Ouverte / Etalab 2.0
NVD (NIST) via fkie-cad/nvd-json-data-feedsPublic domain — this product uses data from the NVD API but is not endorsed or certified by the NVD