SB2017092026 - Reachable assertion in Linux kernel arm64 kvm
Published: September 20, 2017
Security Bulletin ID
SB2017092026
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Reachable assertion (CVE-ID: CVE-2017-12168)
CWE-ID: CWE-617 - Reachable Assertion
CVSSv4: 6.7 [CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a local privileged user to a crash the entire system.
The vulnerability exists due to reachable assertion within the access_pmu_evcntr() function in arch/arm64/kvm/sys_regs.c. A local privileged user can a crash the entire system.
Remediation
Install update from vendor's website.
References
- https://github.com/torvalds/linux/commit/9e3f7a29694049edd728e2400ab57ad7553e5aa9
- https://bugzilla.redhat.com/show_bug.cgi?id=1492984
- http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.8.11
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=9e3f7a29694049edd728e2400ab57ad7553e5aa9