CVE-2026-99052selinux: preserve NATIVE_LABELS on already-initialized sb in set_mnt_opts
- —Not scoredno CVSS score yet
- 0.18%Exploitation in 30 daysEPSS · top 93% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
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.
Timeline
ID reserved
By Linux
- 28 days later
· 28 days later
Published
- 7 days later
· 7 days later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
No CVSS score yet: neither the CNA, CISA nor NVD has scored this CVE. NVD status: Received.
- EPSS (exploitation in 30 days)
- 0.18% · top 93% of all CVEs (13 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Not scored.
Affected products
- affected eb9ae686507bc5a5ca78e6b3fbe629cd5cc67864 – < 22987d24a159ed7df3cdc9090ca5d61e58df0cac
- affected eb9ae686507bc5a5ca78e6b3fbe629cd5cc67864 – < 2f0f1f5a3b89c1ed67e39be49d29ee7f5c96e039
- affected eb9ae686507bc5a5ca78e6b3fbe629cd5cc67864 – < dc579e43b13cb65e55eabaae4f1a950e43567fb1
- affected eb9ae686507bc5a5ca78e6b3fbe629cd5cc67864 – < a545def625860d4ccedc14fe45e884a62a041cef
- affected eb9ae686507bc5a5ca78e6b3fbe629cd5cc67864 – < a6da93c625b3557dd23ff6db45d2d1bafeae1565
- affected eb9ae686507bc5a5ca78e6b3fbe629cd5cc67864 – < 5509d498e1b9edafebd5a60ba3cb9ecfda23dc2b
- affected eb9ae686507bc5a5ca78e6b3fbe629cd5cc67864 – < c997832414f1d846de0a1fa38d7d4f62ba2ea917
- affected eb9ae686507bc5a5ca78e6b3fbe629cd5cc67864 – < 28b7260548af3d35773477993ad4e4de41578dd7
- affected 3.11
- unaffected < 3.11
- unaffected 5.10.273 – ≤ 5.10.*
- unaffected 5.15.224 – ≤ 5.15.*
- unaffected 6.1.191 – ≤ 6.1.*
- unaffected 6.6.160 – ≤ 6.6.*
- unaffected 6.12.113 – ≤ 6.12.*
- unaffected 6.18.57 – ≤ 6.18.*
- unaffected 7.2.11 – ≤ 7.2.*
- unaffected 7.3 – ≤ *
References
References8
- https://git.kernel.org/stable/c/22987d24a159ed7df3cdc9090ca5d61e58df0cac (opens in a new tab)
- https://git.kernel.org/stable/c/2f0f1f5a3b89c1ed67e39be49d29ee7f5c96e039 (opens in a new tab)
- https://git.kernel.org/stable/c/dc579e43b13cb65e55eabaae4f1a950e43567fb1 (opens in a new tab)
- https://git.kernel.org/stable/c/a545def625860d4ccedc14fe45e884a62a041cef (opens in a new tab)
- https://git.kernel.org/stable/c/a6da93c625b3557dd23ff6db45d2d1bafeae1565 (opens in a new tab)
- https://git.kernel.org/stable/c/5509d498e1b9edafebd5a60ba3cb9ecfda23dc2b (opens in a new tab)
- https://git.kernel.org/stable/c/c997832414f1d846de0a1fa38d7d4f62ba2ea917 (opens in a new tab)
- https://git.kernel.org/stable/c/28b7260548af3d35773477993ad4e4de41578dd7 (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-108847 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
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[](https://cveledger.app/cve/CVE-2026-99052)Record last updated .