CVE-2017-18270
In the Linux kernel before 4.13.5, a local user could create keyrings for other users via keyctl commands, setting unwanted defaults or causing a denial of service.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.40%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
In the Linux kernel before 4.13.5, a local user could create keyrings for other users via keyctl commands, setting unwanted defaults or causing a denial of service.
- CVSS 3.0
- 7.1 HIGHCVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
- EPSS
- 0.40% probability · 34th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Affected
- linux/linux kernel
- Source
- cve@mitre.org
EPSS 0.4% since 27 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=237bbd29f7a049d310d907f4b2716a7feef9abf3Patch
- http://www.securityfocus.com/bid/104254Third Party Advisory, VDB Entry
- https://bugzilla.redhat.com/show_bug.cgi?id=1580979
- https://bugzilla.redhat.com/show_bug.cgi?id=1856774#c11
- https://bugzilla.redhat.com/show_bug.cgi?id=1856774#c9
- https://github.com/torvalds/linux/commit/237bbd29f7a049d310d907f4b2716a7feef9abf3Patch
- https://support.f5.com/csp/article/K37301725
- https://usn.ubuntu.com/3754-1/
- https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.13.5Release Notes
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=237bbd29f7a049d310d907f4b2716a7feef9abf3Patch
- http://www.securityfocus.com/bid/104254Third Party Advisory, VDB Entry
- https://bugzilla.redhat.com/show_bug.cgi?id=1580979
- https://bugzilla.redhat.com/show_bug.cgi?id=1856774#c11
- https://bugzilla.redhat.com/show_bug.cgi?id=1856774#c9
- https://github.com/torvalds/linux/commit/237bbd29f7a049d310d907f4b2716a7feef9abf3Patch
- https://support.f5.com/csp/article/K37301725
- https://usn.ubuntu.com/3754-1/
- https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.13.5Release Notes
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.