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CVE-2017-15126

HIGH
8.1
CVSS Score
Published: January 14, 2018 at 06:00 AM UTC
Updated: June 17, 2026 at 01:07 AM UTC
2 products affected across 2 vendorsLinux KernelKernel

Using Linux Kernel before 4.13.6 by N/A?

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Severity
HIGH8.1
Exploit prediction
EPSS 4%

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().

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Linux Kernel· Linux
95%
4.11 ≤ v < 4.13.6
Affected range stops below 4.13.6, so it looks safe — our inference, not a vendor statement
Kernel· Red Hat
60%
All versions

References (8)

x_refsource_MISCVendor Advisory
Source: [email protected]
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=384632e67e0829deb8015ee6ad916b180049d252
VDB Entryx_refsource_BIDThird Party Advisory
Source: [email protected]
http://www.securityfocus.com/bid/102516
Vendor Advisoryx_refsource_REDHATThird Party Advisory
Source: [email protected]
https://access.redhat.com/errata/RHSA-2018:0676
Vendor Advisoryx_refsource_REDHATThird Party Advisory
Source: [email protected]
https://access.redhat.com/errata/RHSA-2018:1062
x_refsource_MISCThird Party Advisory
Source: [email protected]
https://access.redhat.com/security/cve/CVE-2017-15126
x_refsource_MISCIssue TrackingThird Party Advisory
Source: [email protected]
https://bugzilla.redhat.com/show_bug.cgi?id=1523481
x_refsource_MISCThird Party Advisory
Source: [email protected]
https://github.com/torvalds/linux/commit/384632e67e0829deb8015ee6ad916b180049d252
x_refsource_MISCVendor Advisory
Source: [email protected]
https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.13.6

CVSS

8.1HIGH[email protected]
Attack Vector
NETWORK
Complexity
HIGH
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-119CWE-416

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