Vulnerabilities
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CVE Vulnerabilities

CVE-2019-8956

Use After Free

Published: Apr 01, 2019 | 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
7.8 IMPORTANT
CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
Ubuntu
MEDIUM
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Additional information
NVDhttps://nvd.nist.gov/vuln/detail/CVE-2019-8956
CWEhttps://cwe.mitre.org/data/definitions/416.html

In the Linux Kernel before versions 4.20.8 and 4.19.21 a use-after-free error in the sctp_sendmsg() function (net/sctp/socket.c) when handling SCTP_SENDALL flag can be exploited to corrupt memory.

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 Any operations using the original pointer are no longer valid because the memory “belongs” to the code that operates on the new pointer.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_kernelLinux4.17 (including)4.19.21 (excluding)
Linux_kernelLinux4.20 (including)4.20.8 (excluding)
LinuxUbuntucosmic*
LinuxUbuntuupstream*
Linux-awsUbuntucosmic*
Linux-awsUbuntuupstream*
Linux-aws-hweUbuntuupstream*
Linux-azureUbuntubionic*
Linux-azureUbuntucosmic*
Linux-azureUbuntuesm-infra/bionic*
Linux-azureUbuntuupstream*
Linux-azure-edgeUbuntubionic*
Linux-azure-edgeUbuntuesm-infra/bionic*
Linux-azure-edgeUbuntuupstream*
Linux-euclidUbuntuupstream*
Linux-floUbuntutrusty*
Linux-floUbuntuupstream*
Linux-floUbuntuxenial*
Linux-gcpUbuntucosmic*
Linux-gcpUbuntuupstream*
Linux-gcp-edgeUbuntubionic*
Linux-gcp-edgeUbuntuesm-infra/bionic*
Linux-gcp-edgeUbuntuupstream*
Linux-gkeUbuntuupstream*
Linux-gkeUbuntuxenial*
Linux-goldfishUbuntutrusty*
Linux-goldfishUbuntuupstream*
Linux-goldfishUbuntuxenial*
Linux-grouperUbuntutrusty*
Linux-grouperUbuntuupstream*
Linux-hweUbuntubionic*
Linux-hweUbuntuesm-infra/bionic*
Linux-hweUbuntuupstream*
Linux-hwe-edgeUbuntuupstream*
Linux-kvmUbuntucosmic*
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-oemUbuntuxenial*
Linux-oracleUbuntuupstream*
Linux-raspi2Ubuntucosmic*
Linux-raspi2Ubuntuupstream*
Linux-snapdragonUbuntuupstream*

Potential Mitigations

References

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