Buffer overflow in Linux kernel - CVE-2019-12817
Published: June 25, 2019 / Updated: June 1, 2020
Vulnerability identifier: #VU28400
CSH Severity: Low
CVSS v4: 7.3 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2019-12817
CWE-ID: CWE-119
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local authenticated user to execute arbitrary code.
arch/powerpc/mm/mmu_context_book3s64.c in the Linux kernel before 5.1.15 for powerpc has a bug where unrelated processes may be able to read/write to one another's virtual memory under certain conditions via an mmap above 512 TB. Only a subset of powerpc systems are affected.
Affected software
Linux kernel
Opensuse
Fedora
kernel
kernel-headers
Opensuse
Fedora
kernel
kernel-headers
How to mitigate CVE-2019-12817
Install update from vendor's website.
Linux kernel - update to 5.3
kernel - addressed in versions 5.1.15-200.fc29, 5.1.15-300.fc30
kernel-headers - addressed in versions 5.1.15-200.fc29, 5.1.15-300.fc30
kernel - addressed in versions 5.1.15-200.fc29, 5.1.15-300.fc30
kernel-headers - addressed in versions 5.1.15-200.fc29, 5.1.15-300.fc30