CVE-2018-18955Not scoredCWE-863

CVE-2018-18955: Linux Kernel vulnerability

Linux · Linux Kernel

Fixed in 4.19.2 · Affected: Linux Kernel before 4.19.2 · Exploitation: possible (1 to 10%)

Not in CyberSIXT coverage yet: no article names this CVE. This page shows the public record.

7.7%probability of exploitation in the next 30 days

94th percentile

050100

Higher than 94% of scored CVEs

Not scored yet. The CVE record carries no CVSS score.

DescriptionCVE.org

In the Linux kernel 4.15.x through 4.19.x before 4.19.2, map_write() in kernel/user_namespace.c allows privilege escalation because it mishandles nested user namespaces with more than 5 UID or GID ranges. A user who has CAP_SYS_ADMIN in an affected user namespace can bypass access controls on resources outside the namespace, as demonstrated by reading /etc/shadow. This occurs because an ID transformation takes place properly for the namespaced-to-kernel direction but not for the kernel-to-namespaced direction.

On the Atlas

Every published CVE is on the CyberSIXT Atlas, grouped by weakness, vendor and month.

Open the Atlas

Exploitation: Possible (1 to 10%). EPSS between 1% and 10%.
CISA KEV: Not listed
Public check: No public nuclei template
Weakness: Incorrect Authorization · Access Control
Vendor: Linux
Published: November 2018
Band: Possible (1 to 10%), November 2018

CoverageNo articles yet

No CyberSIXT article names CVE-2018-18955 yet, so there is no coverage timeline, action brief or change log for it. Everything on this page comes from the public CVE record, CISA KEV, EPSS and the nuclei template index. Search the archive or see the CVEs in the news.

References

3 more references are in the CVE record.