Description
A use-after-free flaw was found in fs/userfaultfd.c in the Linux kernel before 4.13.6. The issue is related to the handling of fork failure when dealing with event messages. Failure to fork correctly can lead to a situation where a fork event will be removed from an already freed list of events with userfaultfd_ctx_put().
References (8)
Core 8
Core References
Third Party Advisory, VDB Entry vdb-entry
x_refsource_bid
http://www.securityfocus.com/bid/102516
Vendor Advisory x_refsource_misc
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=384632e67e0829deb8015ee6ad916b180049d252
Issue Tracking, Third Party Advisory x_refsource_misc
https://bugzilla.redhat.com/show_bug.cgi?id=1523481
Third Party Advisory vendor-advisory
x_refsource_redhat
https://access.redhat.com/errata/RHSA-2018:1062
Third Party Advisory x_refsource_misc
https://github.com/torvalds/linux/commit/384632e67e0829deb8015ee6ad916b180049d252
Third Party Advisory vendor-advisory
x_refsource_redhat
https://access.redhat.com/errata/RHSA-2018:0676
Vendor Advisory x_refsource_misc
https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.13.6
Third Party Advisory x_refsource_misc
https://access.redhat.com/security/cve/CVE-2017-15126
Scores
CVSS v3
8.1
EPSS
0.0115
EPSS Percentile
78.6%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Details
CWE
CWE-119
CWE-416
Status
published
Products (1)
linux/linux_kernel
4.11 - 4.13.6
Published
Jan 14, 2018
Tracked Since
Feb 18, 2026