Vulnerability in Linux Kernel
CVE-2018-15572
The spectre_v2_select_mitigation function in arch/x86/kernel/cpu/bugs.c in the Linux kernel before 4.18.1 does not always fill RSB upon a context switch, which makes it easier for attackers to conduct userspace-userspace spectreRSB attacks.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.005 (41.5th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 41st percentile — 41.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000
Affected products
- Linux Kernel
- Canonical Ubuntu Linux — versions 12.04, 14.04, 16.04
- Debian Linux — versions 8.0, 9.0
Public proof-of-concept exploits
References
- git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/ (Patch, Mitigation, Vendor Advisory)
- usn.ubuntu.com/3776-1/ (vendor-advisory, Third Party Advisory)
- usn.ubuntu.com/3776-2/ (vendor-advisory, Third Party Advisory)
- usn.ubuntu.com/3777-1/ (vendor-advisory, Third Party Advisory)
- github.com/torvalds/linux/commit/fdf82a7856b32d905c39afc85e34364491e46346 (Patch, Third Party Advisory, Mitigation)
- usn.ubuntu.com/3775-1/ (vendor-advisory, Third Party Advisory)
- lists.debian.org/debian-lts-announce/2018/10/msg00003.html (mailing-list, Mailing List, Third Party Advisory)
- www.debian.org/security/2018/dsa-4308 (vendor-advisory, Third Party Advisory)
- usn.ubuntu.com/3775-2/ (vendor-advisory, Third Party Advisory)
- cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.18.1 (Patch, Mitigation, Vendor Advisory)
Frequently asked questions
- What is CVE-2018-15572?
- CVE-2018-15572 is a medium-severity vulnerability in Linux Kernel. CVSS score: 6.5/10. Published 2018-08-20.
- How severe is CVE-2018-15572?
- Medium severity. CVSS v3 base score is 6.5 out of 10.
- Is CVE-2018-15572 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.