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CVE-2026-99052: Linux

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CVSS

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Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)

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    Описание

    Оригинално описание

    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.

    Засегнати продукти

    • Linux Linux: eb9ae686507bc5a5ca78e6b3fbe629cd5cc67864 преди 22987d24a159ed7df3cdc9090ca5d61e58df0cac; eb9ae686507bc5a5ca78e6b3fbe629cd5cc67864 преди 2f0f1f5a3b89c1ed67e39be49d29ee7f5c96e039; eb9ae686507bc5a5ca78e6b3fbe629cd5cc67864 преди dc579e43b13cb65e55eabaae4f1a950e43567fb1; eb9ae686507bc5a5ca78e6b3fbe629cd5cc67864 преди a545def625860d4ccedc14fe45e884a62a041cef; eb9ae686507bc5a5ca78e6b3fbe629cd5cc67864 преди a6da93c625b3557dd23ff6db45d2d1bafeae1565; eb9ae686507bc5a5ca78e6b3fbe629cd5cc67864 преди 5509d498e1b9edafebd5a60ba3cb9ecfda23dc2b; eb9ae686507bc5a5ca78e6b3fbe629cd5cc67864 преди c997832414f1d846de0a1fa38d7d4f62ba2ea917; eb9ae686507bc5a5ca78e6b3fbe629cd5cc67864 преди 28b7260548af3d35773477993ad4e4de41578dd7
    • Linux Linux: 3.11; преди 3.11; 5.10.273 до 5.10.*; 5.15.224 до 5.15.*; 6.1.191 до 6.1.*; 6.6.160 до 6.6.*; 6.12.113 до 6.12.*; 6.18.57 до 6.18.*; 7.2.11 до 7.2.*; от 7.3 нататък

    История

    • 23 октомври 2026 Публикувано

    Други уязвимости в Linux Linux

    Първоизточници

    CVE-2026-99052: Linux | freedomonline.bg