{ "cveId": "CVE-2026-99052", "url": "https://patchblox.com/security/cve/CVE-2026-99052", "summary": "CVE-2026-99052 is fixed in 19 products on 1 platform, first by DEBIAN-CVE-2026-99052, released October 24, 2026. It is not reported as exploited. Patch Radar priority: Routine.", "title": "selinux: preserve NATIVE_LABELS on already-initialized sb in set_mnt_opts", "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 (\u0022security/selinux: fix SECURITY_LSM_NATIVE_LABELS on reused superblock\u0022) 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.", "published": "2026-10-23T13:17:28Z", "severity": "Moderate", "cvss": 6, "epss": 0.00177, "epssPercentile": 0.07338, "priority": "Routine", "priorityTier": 4, "exploited": false, "vendorExploited": false, "disclosed": false, "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-99052", "fixes": [ { "platform": "linux", "product": "bpftool6.12", "release": "amzn 2023", "fixedVersion": "1:6.12.113-138.209.amzn2023", "fix": "ALAS2023-2026-3335", "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3335", "released": "2026-11-07T01:06:52Z" }, { "platform": "linux", "product": "bpftool6.12-debuginfo", "release": "amzn 2023", "fixedVersion": "1:6.12.113-138.209.amzn2023", "fix": "ALAS2023-2026-3335", "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3335", "released": "2026-11-07T01:06:52Z" }, { "platform": "linux", "product": "kernel-livepatch-6.12.113-138.209", "release": "amzn 2023", "fixedVersion": "1:1.0-0.amzn2023", "fix": "ALAS2023-2026-3335", "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3335", "released": "2026-11-07T01:06:52Z" }, { "platform": "linux", "product": "kernel6.12", "release": "amzn 2023", "fixedVersion": "1:6.12.113-138.209.amzn2023", "fix": "ALAS2023-2026-3335", "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3335", "released": "2026-11-07T01:06:52Z" }, { "platform": "linux", "product": "kernel6.12-debuginfo", "release": "amzn 2023", "fixedVersion": "1:6.12.113-138.209.amzn2023", "fix": "ALAS2023-2026-3335", "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3335", "released": "2026-11-07T01:06:52Z" }, { "platform": "linux", "product": "kernel6.12-debuginfo-common-aarch64", "release": "amzn 2023", "fixedVersion": "1:6.12.113-138.209.amzn2023", "fix": "ALAS2023-2026-3335", "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3335", "released": "2026-11-07T01:06:52Z" }, { "platform": "linux", "product": "kernel6.12-debuginfo-common-x86_64", "release": "amzn 2023", "fixedVersion": "1:6.12.113-138.209.amzn2023", "fix": "ALAS2023-2026-3335", "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3335", "released": "2026-11-07T01:06:52Z" }, { "platform": "linux", "product": "kernel6.12-devel", "release": "amzn 2023", "fixedVersion": "1:6.12.113-138.209.amzn2023", "fix": "ALAS2023-2026-3335", "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3335", "released": "2026-11-07T01:06:52Z" }, { "platform": "linux", "product": "kernel6.12-headers", "release": "amzn 2023", "fixedVersion": "1:6.12.113-138.209.amzn2023", "fix": "ALAS2023-2026-3335", "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3335", "released": "2026-11-07T01:06:52Z" }, { "platform": "linux", "product": "kernel6.12-modules-extra", "release": "amzn 2023", "fixedVersion": "1:6.12.113-138.209.amzn2023", "fix": "ALAS2023-2026-3335", "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3335", "released": "2026-11-07T01:06:52Z" }, { "platform": "linux", "product": "kernel6.12-modules-extra-common", "release": "amzn 2023", "fixedVersion": "1:6.12.113-138.209.amzn2023", "fix": "ALAS2023-2026-3335", "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3335", "released": "2026-11-07T01:06:52Z" }, { "platform": "linux", "product": "kernel6.12-tools", "release": "amzn 2023", "fixedVersion": "1:6.12.113-138.209.amzn2023", "fix": "ALAS2023-2026-3335", "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3335", "released": "2026-11-07T01:06:52Z" }, { "platform": "linux", "product": "kernel6.12-tools-debuginfo", "release": "amzn 2023", "fixedVersion": "1:6.12.113-138.209.amzn2023", "fix": "ALAS2023-2026-3335", "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3335", "released": "2026-11-07T01:06:52Z" }, { "platform": "linux", "product": "kernel6.12-tools-devel", "release": "amzn 2023", "fixedVersion": "1:6.12.113-138.209.amzn2023", "fix": "ALAS2023-2026-3335", "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3335", "released": "2026-11-07T01:06:52Z" }, { "platform": "linux", "product": "linux", "release": "Debian 13.5 (trixie)", "fixedVersion": "6.12.113-1", "fix": "DEBIAN-CVE-2026-99052", "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-99052", "released": "2026-10-24T13:25:57Z" }, { "platform": "linux", "product": "linux", "release": "Debian 14", "fixedVersion": "7.2.11-1", "fix": "DEBIAN-CVE-2026-99052", "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-99052", "released": "2026-10-24T13:25:57Z" }, { "platform": "linux", "product": "perf6.12", "release": "amzn 2023", "fixedVersion": "1:6.12.113-138.209.amzn2023", "fix": "ALAS2023-2026-3335", "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3335", "released": "2026-11-07T01:06:52Z" }, { "platform": "linux", "product": "perf6.12-debuginfo", "release": "amzn 2023", "fixedVersion": "1:6.12.113-138.209.amzn2023", "fix": "ALAS2023-2026-3335", "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3335", "released": "2026-11-07T01:06:52Z" }, { "platform": "linux", "product": "python3-perf6.12", "release": "amzn 2023", "fixedVersion": "1:6.12.113-138.209.amzn2023", "fix": "ALAS2023-2026-3335", "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3335", "released": "2026-11-07T01:06:52Z" }, { "platform": "linux", "product": "python3-perf6.12-debuginfo", "release": "amzn 2023", "fixedVersion": "1:6.12.113-138.209.amzn2023", "fix": "ALAS2023-2026-3335", "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3335", "released": "2026-11-07T01:06:52Z" } ], "noFixYet": [], "dataAsOf": "2026-11-08T06:59:42Z", "attribution": { "text": "Data: Patchblox Patch Radar", "url": "https://patchblox.com/security/patch-radar", "terms": "https://patchblox.com/security/patch-radar/use-the-data" } }