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CVE Vulnerabilities

CVE-2018-14619

Use After Free

Published: Aug 30, 2018 | Modified: Nov 21, 2024
CVSS 3.x
7.8
HIGH
Source:
NVD
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS 2.x
7.2 HIGH
AV:L/AC:L/Au:N/C:C/I:C/A:C
RedHat/V2
RedHat/V3
6.2 IMPORTANT
CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Ubuntu
MEDIUM
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Additional information
NVDhttps://nvd.nist.gov/vuln/detail/CVE-2018-14619
CWEhttps://cwe.mitre.org/data/definitions/416.html

A flaw was found in the crypto subsystem of the Linux kernel before version kernel-4.15-rc4. The null skcipher was being dropped when each af_alg_ctx was freed instead of when the aead_tfm was freed. This can cause the null skcipher to be freed while it is still in use leading to a local user being able to crash the system or possibly escalate privileges.

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 Any operations using the original pointer are no longer valid because the memory “belongs” to the code that operates on the new pointer.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_kernelLinux4.14 (including)4.14.8 (excluding)
Linux_kernelLinux4.15-rc1 (including)4.15-rc1 (including)
Linux_kernelLinux4.15-rc2 (including)4.15-rc2 (including)
Linux_kernelLinux4.15-rc3 (including)4.15-rc3 (including)
Red Hat Enterprise Linux 7RedHatkernel-alt-0:4.14.0-115.el7a*
LinuxUbuntuupstream*
Linux-awsUbuntuupstream*
Linux-azureUbuntuupstream*
Linux-azure-edgeUbuntuupstream*
Linux-euclidUbuntuupstream*
Linux-floUbuntutrusty*
Linux-floUbuntuupstream*
Linux-floUbuntuxenial*
Linux-gcpUbuntuupstream*
Linux-gkeUbuntuupstream*
Linux-gkeUbuntuxenial*
Linux-goldfishUbuntutrusty*
Linux-goldfishUbuntuupstream*
Linux-goldfishUbuntuxenial*
Linux-grouperUbuntutrusty*
Linux-grouperUbuntuupstream*
Linux-hweUbuntuupstream*
Linux-hwe-edgeUbuntuupstream*
Linux-kvmUbuntuupstream*
Linux-lts-trustyUbuntuupstream*
Linux-lts-utopicUbuntutrusty*
Linux-lts-utopicUbuntuupstream*
Linux-lts-vividUbuntutrusty*
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-raspi2Ubuntuupstream*
Linux-snapdragonUbuntuupstream*

Potential Mitigations

References

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