CVE-2025-38499clone_private_mnt(): make sure that caller has CAP_SYS_ADMIN in the right userns
Updated under an hour ago ()
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It affects Linux and 5 other products. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 7.8 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Modified
- Record last updated
- Oct 15, 2026
- First seen by InfoSec Signals
- Oct 15, 2026
Affected products
Linux Linux linux:linux (from the name) | 427215d85e8d1476da1a86b8d67aceb485eb3631 builds before 36fecd740de2d542d2091d65d36554ee2bcf9c65; from 427215d85e8d1476da1a86b8d67aceb485eb3631 before d717325b5ecf2a40daca85c61923e17f32306179; from 427215d85e8d1476da1a86b8d67aceb485eb3631 before dc6a664089f10eab0fb36b6e4f705022210191d2; from 427215d85e8d1476da1a86b8d67aceb485eb3631 before e77078e52fbf018ab986efb3c79065ab35025607; 427215d85e8d1476da1a86b8d67aceb485eb3631 builds before 38628ae06e2a37770cd794802a3f1310cf9846e3; from 427215d85e8d1476da1a86b8d67aceb485eb3631 before c28f922c9dcee0e4876a2c095939d77fe7e15116; c6e8810d25295acb40a7b69ed3962ff181919571; e3eee87c846dc47f6d8eb6d85e7271f24122a279; and 12 more ranges | CNA record |
Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP siemens:simatic_s7_1500_cpu_1518_4_pn_dp_mfp (from the name) | from V3.1.5 | CISA ADP |
Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP siemens:simatic_s7_1500_cpu_1518f_4_pn_dp_mfp (from the name) | from V3.1.5 | CISA ADP |
Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP siemens:siplus_s7_1500_cpu_1518_4_pn_dp_mfp (from the name) | from V3.1.5 | CISA ADP |
linux linux_kernel linux:linux_kernel | from 4.4.281 before 4.5; from 4.9.280 before 4.10; from 4.14.244 before 4.15; from 4.19.204 before 4.20; from 5.4.141 before 5.5; from 5.10.59 before 5.11; from 5.13.11 before 5.14; from 5.14.1 before 5.15.190; and 7 more ranges | NVD |
debian debian_linux debian:debian_linux | 11.0 | NVD |
References
- https://git.kernel.org/stable/c/36fecd740de2d542d2091d65d36554ee2bcf9c65patch
- https://git.kernel.org/stable/c/d717325b5ecf2a40daca85c61923e17f32306179patch
- https://git.kernel.org/stable/c/dc6a664089f10eab0fb36b6e4f705022210191d2patch
- https://git.kernel.org/stable/c/e77078e52fbf018ab986efb3c79065ab35025607patch
- https://git.kernel.org/stable/c/38628ae06e2a37770cd794802a3f1310cf9846e3patch
- https://git.kernel.org/stable/c/c28f922c9dcee0e4876a2c095939d77fe7e15116patch
- https://lists.debian.org/debian-lts-announce/2025/10/msg00008.htmlthird-party-advisory
- https://cert-portal.siemens.com/productcert/html/ssa-082556.html
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.