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TI-2025-25837 Aliases CVE-2025-38499GHSA-cc85-5h45-qhc8

clone_private_mnt(): make sure that caller has CAP_SYS_ADMIN in the right userns

Priority LOW 35Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat.

Summary

In the Linux kernel, the following vulnerability has been resolved: clone_private_mnt(): make sure that caller has CAP_SYS_ADMIN in the right userns What we want is to verify there is that clone won't expose something hidden by a mount we wouldn't be able to undo. "Wouldn't be able to undo" may be a result of MNT_LOCKED on a child, but it may also come from lacking admin rights in the userns of the namespace mount belongs to. clone_private_mnt() checks the former, but not the latter. There's a number of rather confusing CAP_SYS_ADMIN checks in various userns during the mount, especially with the new mount API; they serve different purposes and in case of clone_private_mnt() they usually, but not always end up covering the missing check mentioned above.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00185 8th percentileScored 2026-11-07
Fix Fixed Linux (Linux): 4.5, 4.10, 4.15 +10Red Hat: 4 advisories

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
LinuxLinux4.4.281 to before 4.5; 4.9.280 to before 4.10; 4.14.244 to before 4.15; 4.19.204 to before 4.20; 5.4.141 to before 5.5; 5.10.59 to before 5.11; 5.13.11 to before 5.144.5, 4.10, 4.15, 4.20, 5.5, 5.11, 5.14Patch availableCNA
LinuxLinux5.14 and later5.15.190, 6.1.147, 6.6.100, 6.12.40, 6.15.3, 6.16Patch availableCNA
  • Linux VendorLinux Affected 4.4.281 to before 4.5; 4.9.280 to before 4.10; 4.14.244 to before 4.15; 4.19.204 to before 4.20; 5.4.141 to before 5.5; 5.10.59 to before 5.11; 5.13.11 to before 5.14 Fixed in 4.5, 4.10, 4.15, 4.20, 5.5, 5.11, 5.14 Patch available CNA
  • Linux VendorLinux Affected 5.14 and later Fixed in 5.15.190, 6.1.147, 6.6.100, 6.12.40, 6.15.3, 6.16 Patch available CNA

CPE configurations NVD · 5

CPEVersionsRoleVendor
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*4.4.281 to before 4.5; 4.9.280 to before 4.10; 4.14.244 to before 4.15; 4.19.204 to before 4.20; 5.4.141 to before 5.5; 5.10.59 to before 5.11; 5.13.11 to before 5.14; 5.14.1 to before 5.15.190; 5.16 to before 6.1.147; 6.2 to before 6.6.100; 6.7 to before 6.12.40; 6.13 to before 6.15.3VulnerableLinux
cpe:2.3:o:linux:linux_kernel:5.14:-:*:*:*:*:*:*5.14VulnerableLinux
cpe:2.3:o:linux:linux_kernel:5.14:rc6:*:*:*:*:*:*5.14 rc6VulnerableLinux
cpe:2.3:o:linux:linux_kernel:5.14:rc7:*:*:*:*:*:*5.14 rc7VulnerableLinux
cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*11.0VulnerableDebian
  • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions 4.4.281 to before 4.5; 4.9.280 to before 4.10; 4.14.244 to before 4.15; 4.19.204 to before 4.20; 5.4.141 to before 5.5; 5.10.59 to before 5.11; 5.13.11 to before 5.14; 5.14.1 to before 5.15.190; 5.16 to before 6.1.147; 6.2 to before 6.6.100; 6.7 to before 6.12.40; 6.13 to before 6.15.3 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:5.14:-:*:*:*:*:*:* Versions 5.14 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:5.14:rc6:*:*:*:*:*:* Versions 5.14 rc6 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:5.14:rc7:*:*:*:*:*:* Versions 5.14 rc7 Vulnerable ·Linux
  • cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:* Versions 11.0 Vulnerable ·Debian

Remediation

  • Fix · CNA Linux (Linux) Fixed in 4.5, 4.10, 4.15, 4.20, 5.5, 5.11, 5.14
  • Fix · CNA Linux (Linux) Fixed in 5.15.190, 6.1.147, 6.6.100, 6.12.40, 6.15.3, 6.16

Red Hat 4 advisories

  • RHSA-2025:23730 Released 2025-12-22 · Red Hat rating Important
    kpatch-patch-5_14_0-611_9_1 security update
    • Red Hat Enterprise Linux BaseOS (v. 9) kpatch-patch-5_14_0-611_9_1-1-1.el9_7
  • RHSA-2025:23241 Released 2025-12-17 · Red Hat rating Important
    kernel security update
    • Red Hat Enterprise Linux AppStream (v. 9) kernel-64k-debug-devel-5.14.0-611.16.1.el9_7, kernel-64k-debug-devel-matched-5.14.0-611.16.1.el9_7, kernel-64k-devel-5.14.0-611.16.1.el9_7 +12
    • Red Hat Enterprise Linux BaseOS (v. 9) kernel-5.14.0-611.16.1.el9_7, kernel-64k-5.14.0-611.16.1.el9_7, kernel-64k-core-5.14.0-611.16.1.el9_7 +28
    • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) kernel-tools-libs-devel-5.14.0-611.16.1.el9_7, libperf-5.14.0-611.16.1.el9_7
    • Red Hat Enterprise Linux Real Time (v. 9) kernel-rt-5.14.0-611.16.1.el9_7, kernel-rt-64k-5.14.0-611.16.1.el9_7, kernel-rt-64k-core-5.14.0-611.16.1.el9_7 +21
    • Red Hat Enterprise Linux Real Time for NFV (v. 9) kernel-rt-5.14.0-611.16.1.el9_7, kernel-rt-core-5.14.0-611.16.1.el9_7, kernel-rt-debug-5.14.0-611.16.1.el9_7 +9
  • RHSA-2025:23250 Released 2025-12-17 · Red Hat rating Important
    kernel security update
    • Red Hat Enterprise Linux AppStream EUS (v. 10.0) kernel-64k-debug-devel-6.12.0-55.50.1.el10_0, kernel-64k-debug-devel-matched-6.12.0-55.50.1.el10_0, kernel-64k-devel-6.12.0-55.50.1.el10_0 +12
    • Red Hat Enterprise Linux BaseOS EUS (v. 10.0) kernel-6.12.0-55.50.1.el10_0, kernel-64k-6.12.0-55.50.1.el10_0, kernel-64k-core-6.12.0-55.50.1.el10_0 +28
    • Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0) kernel-tools-libs-devel-6.12.0-55.50.1.el10_0, libperf-6.12.0-55.50.1.el10_0
    • Red Hat Enterprise Linux Real Time EUS (v. 10.0) kernel-rt-6.12.0-55.50.1.el10_0, kernel-rt-64k-6.12.0-55.50.1.el10_0, kernel-rt-64k-core-6.12.0-55.50.1.el10_0 +21
    • Red Hat Enterprise Linux Real Time for NFV EUS (v. 10.0) kernel-rt-6.12.0-55.50.1.el10_0, kernel-rt-core-6.12.0-55.50.1.el10_0, kernel-rt-debug-6.12.0-55.50.1.el10_0 +11
Show 1 more Red Hat advisories
  • RHSA-2025:23279 Released 2025-12-17 · Red Hat rating Important
    kernel security update
    • Red Hat Enterprise Linux AppStream (v. 10) kernel-64k-debug-devel-6.12.0-124.21.1.el10_1, kernel-64k-debug-devel-matched-6.12.0-124.21.1.el10_1, kernel-64k-devel-6.12.0-124.21.1.el10_1 +12
    • Red Hat Enterprise Linux BaseOS (v. 10) kernel-6.12.0-124.21.1.el10_1, kernel-64k-6.12.0-124.21.1.el10_1, kernel-64k-core-6.12.0-124.21.1.el10_1 +29
    • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) kernel-tools-libs-devel-6.12.0-124.21.1.el10_1, libperf-6.12.0-124.21.1.el10_1
    • Red Hat Enterprise Linux Real Time (v. 10) kernel-rt-6.12.0-124.21.1.el10_1, kernel-rt-64k-6.12.0-124.21.1.el10_1, kernel-rt-64k-core-6.12.0-124.21.1.el10_1 +21
    • Red Hat Enterprise Linux Real Time for NFV (v. 10) kernel-rt-6.12.0-124.21.1.el10_1, kernel-rt-core-6.12.0-124.21.1.el10_1, kernel-rt-debug-6.12.0-124.21.1.el10_1 +9

Vendor assessments

Red Hat

Red Hat rating: Important. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux AppStream (v. 10)Fixed RHSA-2025:23279
Red Hat Enterprise Linux AppStream (v. 9)Fixed RHSA-2025:23241
Red Hat Enterprise Linux AppStream EUS (v. 10.0)Fixed RHSA-2025:23250
Red Hat Enterprise Linux BaseOS (v. 10)Fixed RHSA-2025:23279
Red Hat Enterprise Linux BaseOS (v. 9)Fixed RHSA-2025:23241, RHSA-2025:23730
Red Hat Enterprise Linux BaseOS EUS (v. 10.0)Fixed RHSA-2025:23250
Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)Fixed RHSA-2025:23279
Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)Fixed RHSA-2025:23241
Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0)Fixed RHSA-2025:23250
Red Hat Enterprise Linux Real Time (v. 10)Fixed RHSA-2025:23279
Red Hat Enterprise Linux Real Time (v. 9)Fixed RHSA-2025:23241
Red Hat Enterprise Linux Real Time EUS (v. 10.0)Fixed RHSA-2025:23250
Red Hat Enterprise Linux Real Time for NFV (v. 10)Fixed RHSA-2025:23279
Red Hat Enterprise Linux Real Time for NFV (v. 9)Fixed RHSA-2025:23241
Red Hat Enterprise Linux Real Time for NFV EUS (v. 10.0)Fixed RHSA-2025:23250
Not affected: 4 products
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 7
  • Red Hat Enterprise Linux 8
  • Red Hat Enterprise Linux 9

Timeline

  1. 2026-10-02 Threatist record created from CVE-2025-38499
  2. 2026-10-03 Alias added: GHSA-cc85-5h45-qhc8
  3. 2026-10-16 CISA SSVC decision points changed

References

Patch 6

Advisory 1

  • TI-2025-26358 tls: fix handling of zero-length records on the rx_list KEVCVSS 3.1CRITICAL 9.8
  • TI-2026-38352 netfilter: bridge: make ebt_snat ARP rewrite writable KEVCVSS 3.1HIGH 8.8
  • TI-2013-05264 The (1) get_user and (2) put_user API functions in the Linux kernel before 3.5.5 on the… KEVCVSS 3.1HIGH 8.8
  • TI-2022-00125 Integer overflow in kernel KEVCVSS 3.1HIGH 8.4
  • TI-2013-01864 The perf_swevent_init function in kernel/events/core.c in the Linux kernel before 3.8.9… KEVCVSS 3.1HIGH 8.4
  • TI-2021-05514 Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACE KEVCVSS 3.1HIGH 8.3
See all 15278 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences