2017-11-24
ALT-BU-2017-3517-1
Branch p8 update bulletin.
Package kernel-image-std-pae updated to version 4.4.100-alt0.M80P.1 for branch p8 in task 195148.
Closed vulnerabilities
Published: 2018-07-30
Modified: 2024-11-21
Modified: 2024-11-21
CVE-2017-7518
A flaw was found in the Linux kernel before version 4.12 in the way the KVM module processed the trap flag(TF) bit in EFLAGS during emulation of the syscall instruction, which leads to a debug exception(#DB) being raised in the guest stack. A user/process inside a guest could use this flaw to potentially escalate their privileges inside the guest. Linux guests are not affected by this.
Severity: HIGH (7.8)
Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
References:
- [oss-security] 20170623 CVE-2017-7518 Kernel: KVM: debug exception via syscall emulation
- [oss-security] 20170623 CVE-2017-7518 Kernel: KVM: debug exception via syscall emulation
- 99263
- 99263
- 1038782
- 1038782
- https://access.redhat.com/articles/3290921
- https://access.redhat.com/articles/3290921
- RHSA-2018:0395
- RHSA-2018:0395
- RHSA-2018:0412
- RHSA-2018:0412
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-7518
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-7518
- USN-3619-1
- USN-3619-1
- USN-3619-2
- USN-3619-2
- USN-3754-1
- USN-3754-1
- DSA-3981
- DSA-3981
- [kvm] 20170622 [PATCH] KVM: x86: fix singlestepping over syscall
- [kvm] 20170622 [PATCH] KVM: x86: fix singlestepping over syscall