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 can lead to a situation where a fork event will be removed from an already freed list of events with userfaultfd_ctx_put().

CVSS v3.0 8.1 HIGH
CVSS v2.0 9.3 HIGH

8.1^/10

CVSS v3.0 : HIGH

Vector :

Exploitability : 2.2 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

9.3^/10

CVSS v2.0 : HIGH

Vector : AV:N/AC:M/Au:N/C:C/I:C/A:C

Exploitability : 8.6 / Impact : 10.0

Access Vector NETWORK

Access Complexity MEDIUM

Authentication NONE

Confidentiality Impact COMPLETE

Integrity Impact COMPLETE

Availability Impact COMPLETE

References

Link	Resource
https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.13.6	Vendor Advisory
https://github.com/torvalds/linux/commit/384632e67e0829deb8015ee6ad916b180049d252	Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1523481	Issue Tracking Third Party Advisory
https://access.redhat.com/security/cve/CVE-2017-15126	Third Party Advisory
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=384632e67e0829deb8015ee6ad916b180049d252	Vendor Advisory
https://access.redhat.com/errata/RHSA-2018:1062	Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:0676	Third Party Advisory
http://www.securityfocus.com/bid/102516	Third Party Advisory VDB Entry

Advertisement

Configurations

Configuration 1 (hide)

OR	cpe:2.3:o:linux:linux_kernel:4.13.6:::::::*
	cpe:2.3:o:linux:linux_kernel::::::::

Information

Published : 2018-01-13 22:29

Updated : 2023-02-12 15:28

NVD link : CVE-2017-15126

Mitre link : CVE-2017-15126

JSON object : View

CWE

CWE-119

Improper Restriction of Operations within the Bounds of a Memory Buffer

Advertisement

Products Affected

linux

linux_kernel

{"cve": {"data_type": "CVE", "references": {"reference_data": [{"url": "https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.13.6", "name": "https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.13.6", "tags": ["Vendor Advisory"], "refsource": "MISC"}, {"url": "https://github.com/torvalds/linux/commit/384632e67e0829deb8015ee6ad916b180049d252", "name": "https://github.com/torvalds/linux/commit/384632e67e0829deb8015ee6ad916b180049d252", "tags": ["Third Party Advisory"], "refsource": "MISC"}, {"url": "https://bugzilla.redhat.com/show_bug.cgi?id=1523481", "name": "https://bugzilla.redhat.com/show_bug.cgi?id=1523481", "tags": ["Issue Tracking", "Third Party Advisory"], "refsource": "MISC"}, {"url": "https://access.redhat.com/security/cve/CVE-2017-15126", "name": "https://access.redhat.com/security/cve/CVE-2017-15126", "tags": ["Third Party Advisory"], "refsource": "MISC"}, {"url": "http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=384632e67e0829deb8015ee6ad916b180049d252", "name": "http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=384632e67e0829deb8015ee6ad916b180049d252", "tags": ["Vendor Advisory"], "refsource": "MISC"}, {"url": "https://access.redhat.com/errata/RHSA-2018:1062", "name": "RHSA-2018:1062", "tags": ["Third Party Advisory"], "refsource": "REDHAT"}, {"url": "https://access.redhat.com/errata/RHSA-2018:0676", "name": "RHSA-2018:0676", "tags": ["Third Party Advisory"], "refsource": "REDHAT"}, {"url": "http://www.securityfocus.com/bid/102516", "name": "102516", "tags": ["Third Party Advisory", "VDB Entry"], "refsource": "BID"}]}, "data_format": "MITRE", "description": {"description_data": [{"lang": "en", "value": "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()."}]}, "problemtype": {"problemtype_data": [{"description": [{"lang": "en", "value": "CWE-119"}]}]}, "data_version": "4.0", "CVE_data_meta": {"ID": "CVE-2017-15126", "ASSIGNER": "secalert@redhat.com"}}, "impact": {"baseMetricV2": {"cvssV2": {"version": "2.0", "baseScore": 9.3, "accessVector": "NETWORK", "vectorString": "AV:N/AC:M/Au:N/C:C/I:C/A:C", "authentication": "NONE", "integrityImpact": "COMPLETE", "accessComplexity": "MEDIUM", "availabilityImpact": "COMPLETE", "confidentialityImpact": "COMPLETE"}, "severity": "HIGH", "impactScore": 10.0, "obtainAllPrivilege": false, "exploitabilityScore": 8.6, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": false}, "baseMetricV3": {"cvssV3": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 8.1, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "HIGH", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 2.2}}, "publishedDate": "2018-01-14T06:29Z", "configurations": {"nodes": [{"children": [], "operator": "OR", "cpe_match": [{"cpe23Uri": "cpe:2.3:o:linux:linux_kernel:4.13.6:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true}, {"cpe23Uri": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true, "versionEndExcluding": "4.13.6", "versionStartIncluding": "4.11"}]}], "CVE_data_version": "4.0"}, "lastModifiedDate": "2023-02-12T23:28Z"}