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CVE Vulnerabilities

CVE-2017-18202

Use After Free

Published: Feb 27, 2018 | Modified: Nov 21, 2024
CVSS 3.x
7
HIGH
Source:
NVD
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS 2.x
6.9 MEDIUM
AV:L/AC:M/Au:N/C:C/I:C/A:C
RedHat/V2
RedHat/V3
6.7 IMPORTANT
CVSS:3.0/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:H
Ubuntu
MEDIUM
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Additional information
NVDhttps://nvd.nist.gov/vuln/detail/CVE-2017-18202
CWEhttps://cwe.mitre.org/data/definitions/416.html

The __oom_reap_task_mm function in mm/oom_kill.c in the Linux kernel before 4.14.4 mishandles gather operations, which allows attackers to cause a denial of service (TLB entry leak or use-after-free) or possibly have unspecified other impact by triggering a copy_to_user call within a certain time window.

Weakness

The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory “belongs” to the code that operates on the new pointer.

Affected Software

NameVendorStart VersionEnd Version
Linux_kernelLinux4.6 (including)4.9.68 (excluding)
Linux_kernelLinux4.10 (including)4.14.4 (excluding)
Red Hat Enterprise Linux 7RedHatkernel-alt-0:4.14.0-49.13.1.el7a*
LinuxUbuntuartful*
LinuxUbuntuupstream*
Linux-armadaxpUbuntuupstream*
Linux-awsUbuntuupstream*
Linux-azureUbuntuesm-infra/xenial*
Linux-azureUbuntuupstream*
Linux-azureUbuntuxenial*
Linux-azure-edgeUbuntuupstream*
Linux-euclidUbuntuupstream*
Linux-floUbuntutrusty*
Linux-floUbuntuupstream*
Linux-floUbuntuxenial*
Linux-gcpUbuntuesm-infra/xenial*
Linux-gcpUbuntuupstream*
Linux-gcpUbuntuxenial*
Linux-gkeUbuntuupstream*
Linux-goldfishUbuntutrusty*
Linux-goldfishUbuntuupstream*
Linux-grouperUbuntutrusty*
Linux-grouperUbuntuupstream*
Linux-hweUbuntuesm-infra/xenial*
Linux-hweUbuntuupstream*
Linux-hweUbuntuxenial*
Linux-hwe-edgeUbuntuesm-infra/xenial*
Linux-hwe-edgeUbuntuupstream*
Linux-hwe-edgeUbuntuxenial*
Linux-kvmUbuntuupstream*
Linux-linaro-omapUbuntuupstream*
Linux-linaro-sharedUbuntuupstream*
Linux-linaro-vexpressUbuntuupstream*
Linux-lts-quantalUbuntuprecise/esm*
Linux-lts-quantalUbuntuupstream*
Linux-lts-raringUbuntuprecise/esm*
Linux-lts-raringUbuntuupstream*
Linux-lts-saucyUbuntuprecise/esm*
Linux-lts-saucyUbuntuupstream*
Linux-lts-trustyUbuntuupstream*
Linux-lts-utopicUbuntutrusty*
Linux-lts-utopicUbuntuupstream*
Linux-lts-vividUbuntutrusty*
Linux-lts-vividUbuntutrusty/esm*
Linux-lts-vividUbuntuupstream*
Linux-lts-wilyUbuntutrusty*
Linux-lts-wilyUbuntuupstream*
Linux-lts-xenialUbuntuupstream*
Linux-maguroUbuntutrusty*
Linux-maguroUbuntuupstream*
Linux-makoUbuntutrusty*
Linux-makoUbuntuupstream*
Linux-makoUbuntuxenial*
Linux-mantaUbuntutrusty*
Linux-mantaUbuntuupstream*
Linux-oemUbuntuupstream*
Linux-oemUbuntuxenial*
Linux-qcm-msmUbuntuupstream*
Linux-raspi2Ubuntuartful*
Linux-raspi2Ubuntuupstream*
Linux-snapdragonUbuntuupstream*
Linux-ti-omap4Ubuntuupstream*

Potential Mitigations

References

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