Memory leak in Linux kernel - CVE-2019-8980

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Main Vulnerability Database Vulnerabilities #VU17831

Memory leak in Linux kernel - CVE-2019-8980

Published: February 22, 2019


Vulnerability identifier: #VU17831
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2019-8980
CWE-ID: CWE-401
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to improper memory operations in the kernel_read_file function, as defined in the fs/exec.c source code file. A remote attacker can send malicious file that triggers vfs_read failures and memory leak condition and perform a denial of service attack.


Affected software

Linux kernel
Amazon Linux AMI
Red Hat Enterprise Linux for Real Time
Red Hat Enterprise Linux for Real Time for NFV
Red Hat Enterprise Linux for x86_64
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux for ARM 64
Red Hat CodeReady Linux Builder for x86_64
Red Hat CodeReady Linux Builder for Power, little endian
Red Hat CodeReady Linux Builder for ARM 64
Opensuse
Fedora
kernel (Red Hat package)
kernel-rt (Red Hat package)
kernel
kernel-headers

How to mitigate CVE-2019-8980

Install update from vendor's website.

kernel (Red Hat package) - update to 4.18.0-193.el8
kernel-rt (Red Hat package) - update to 4.18.0-193.rt13.51.el8
kernel - addressed in versions 4.20.12-100.fc28, 4.20.12-200.fc29, 4.20.13-100.fc28, 4.20.14-100.fc28
kernel-headers - addressed in versions 4.20.12-100.fc28, 4.20.12-200.fc29, 4.20.13-100.fc28, 4.20.14-100.fc28

External References

Related Security Bulletins