CVE-2018-18397
Estado: ModificadaMedia (5.5)—
The userfaultfd implementation in the Linux kernel before 4.19.7 mishandles access control for certain UFFDIO_ ioctl calls, as demonstrated by allowing local users to write data into holes in a tmpfs file (if the user has read-only access to that file, and that file contains holes), related to fs/userfaultfd.c and mm/userfaultfd.c.
CVSS
- Versión: 3.0
- Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
- Puntuación base: 5.5
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.51%
- Percentil entre todas las CVEs puntuadas: 42
- Fecha de la puntuación: 6/10/2026
EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).
Tecnologías afectadas (10)
Canonical — Ubuntu LinuxLinux — Linux KernelRedhat — Enterprise Linux DesktopRedhat — Enterprise Linux ServerRedhat — Enterprise Linux Server AUSRedhat — Enterprise Linux Server EUSRedhat — Enterprise Linux Server TUSRedhat — Enterprise Linux WorkstationRedhat — Openshift Container PlatformRedhat — Virtualization Host
CWE
- CWE-863
Referencias
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=29ec90660d68bbdd69507c1c8b4e33aa299278b1
- https://access.redhat.com/errata/RHBA-2019:0327
- https://access.redhat.com/errata/RHSA-2019:0163
- https://access.redhat.com/errata/RHSA-2019:0202
- https://access.redhat.com/errata/RHSA-2019:0324
- https://access.redhat.com/errata/RHSA-2019:0831
- https://bugs.chromium.org/p/project-zero/issues/detail?id=1700
- https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.87
- https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.19.7
- https://github.com/torvalds/linux/commit/29ec90660d68bbdd69507c1c8b4e33aa299278b1
- https://usn.ubuntu.com/3901-1/
- https://usn.ubuntu.com/3901-2/
- https://usn.ubuntu.com/3903-1/
- https://usn.ubuntu.com/3903-2/
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=29ec90660d68bbdd69507c1c8b4e33aa299278b1
- https://access.redhat.com/errata/RHBA-2019:0327
- https://access.redhat.com/errata/RHSA-2019:0163
- https://access.redhat.com/errata/RHSA-2019:0202
- https://access.redhat.com/errata/RHSA-2019:0324
- https://access.redhat.com/errata/RHSA-2019:0831
- https://bugs.chromium.org/p/project-zero/issues/detail?id=1700
- https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.87
- https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.19.7
- https://github.com/torvalds/linux/commit/29ec90660d68bbdd69507c1c8b4e33aa299278b1
- https://usn.ubuntu.com/3901-1/
- https://usn.ubuntu.com/3901-2/
- https://usn.ubuntu.com/3903-1/
- https://usn.ubuntu.com/3903-2/
JSON original (NVD)
Mostrar
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