{"apiVersion":"1.0","identifier":"CVE-2026-99052","description":"In the Linux kernel, the following vulnerability has been resolved: selinux: preserve NATIVE_LABELS on already-initialized sb in set_mnt_opts When an NFSv4 filesystem exported with security_label is mounted a second time, sget_fc() returns the existing superblock and nfs_get_root() calls security_sb_set_mnt_opts() again on it. Since the superblock is already SB_INITIALIZED, selinux_set_mnt_opts() takes an early exit without setting SECURITY_LSM_NATIVE_LABELS in *set_kern_flags. nfs_get_root() then sees kflags without SECURITY_LSM_NATIVE_LABELS set and clears NFS_CAP_SECURITY_LABEL on the shared nfs_server, silently disabling per-file labeling for both the new and the original mount. Commit 3815a245b501 (-security/selinux: fix SECURITY_LSM_NATIVE_LABELS on reused superblock-) fixed the same problem in selinux_sb_clone_mnt_opts(). The reused-superblock path for a plain second mount now goes through sb_set_mnt_opts rather than sb_clone_mnt_opts, so it needs the same treatment: on both SE_SBINITIALIZED early exits, set SECURITY_LSM_NATIVE_LABELS in *set_kern_flags when the superblock was already using SECURITY_FS_USE_NATVE.","publishedAt":"2026-10-23T13:17:28","lastModifiedAt":"2026-10-30T13:21:41","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-99052","cvssScore":null,"cvssVector":null,"epssProbability":0.00177,"riskScore":null,"affectedProduct":"Linux kernel","affectedVersions":"unknown","vulnerabilityType":"Kernel","operatingSystems":[],"links":{"self":"https://www.redsauce.net/api/cves/CVE-2026-99052","webPages":{"es":"https://www.redsauce.net/es/cves/CVE-2026-99052","en":"https://www.redsauce.net/en/cves/CVE-2026-99052","fr":"https://www.redsauce.net/fr/cves/CVE-2026-99052","pt":"https://www.redsauce.net/pt/cves/CVE-2026-99052","de":"https://www.redsauce.net/de/cves/CVE-2026-99052","sk":"https://www.redsauce.net/sk/cves/CVE-2026-99052","el":"https://www.redsauce.net/el/cves/CVE-2026-99052"},"source":"https://nvd.nist.gov/vuln/detail/CVE-2026-99052"}}