01 Record

CVE-2017-15126

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

UnratedPUBLISHEDCNA: redhat

CNA base scoreUnratedNo CNA CVSS vector

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02 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

03 Exploitation and scoring

Exploitation: Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
SSVC decision: Not assessed by CISA
EPSS probability: 4.07% probability of exploitation activity in the next 30 days.
EPSS percentile: Equal to or higher than the score of 90.3% of scored records. A rank, not a probability.
NVD base score: 8.1 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD analysis status: Modified. NVD last modified this record on 2026-06-17.
Red Hat severity: Moderate. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published

2018-01-14 06:00Z8 YR AGO

Last updated

2024-08-05 19:50Z2 YR AGO

Reserved

2017-10-08

Assigning CNA

redhat

Record state

PUBLISHED

Severity

Not rated by the issuing CNA

CNA CVSS vector

Not published by the issuing CNA

Weaknesses

CWE-119Improper Restriction of Operations within the Bounds of a Memory BufferClass
CWE-416Use After FreeVariant

Data version

5.1

Document digest

9260e665cba68b46cb409c797b424479145d5c138905f31b1d3d6797ee2c72ca

05 Affected products

VendorProductVersionsPlatforms

n/aLinux Kernel before 4.13.6Linux Kernel before 4.13.6—

06 References

www.securityfocus.com102516http://www.securityfocus.com/bid/102516vdb-entryx_refsource_BID
git.kernel.orghttp://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=384632e67e0829deb8015ee6ad916b180049d252x_refsource_MISC
bugzilla.redhat.comhttps://bugzilla.redhat.com/show_bug.cgi?id=1523481x_refsource_MISC
access.redhat.comRHSA-2018:1062https://access.redhat.com/errata/RHSA-2018:1062vendor-advisoryx_refsource_REDHAT
github.comhttps://github.com/torvalds/linux/commit/384632e67e0829deb8015ee6ad916b180049d252x_refsource_MISC
access.redhat.comRHSA-2018:0676https://access.redhat.com/errata/RHSA-2018:0676vendor-advisoryx_refsource_REDHAT
www.kernel.orghttps://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.13.6x_refsource_MISC
access.redhat.comhttps://access.redhat.com/security/cve/CVE-2017-15126x_refsource_MISC

07 Fixed in

Debian 12

linux
Fixed in 4.13.10-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 13

linux
Fixed in 4.13.10-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 14

linux
Fixed in 4.13.10-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 16.04 LTS

linux-azure
Fixed in 4.13.0-1005.7

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.