CVE-2018-15572
UnknownEPSS 0.51%
Last modified
CVE-2018-15572 is a vulnerability of currently unknown severity. 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.. EPSS estimates a 0.51% chance of exploitation in the next 30 days.
Description
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.
Metrics
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Debian | Debian Linux | 8.0 |
| Debian | Debian Linux | 9.0 |
| Canonical | Ubuntu Linux | 12.04 |
| Canonical | Ubuntu Linux | 14.04 |
| Canonical | Ubuntu Linux | 16.04 |
| Canonical | Ubuntu Linux | 18.04 |
| Linux | Linux Kernel | < 4.18.1 |
References
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=fdf82a7856b32d905c39afc85e34364491e46346Mitigation, Patch, Vendor Advisory
- https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.18.1Mitigation, Patch, Vendor Advisory
- https://github.com/torvalds/linux/commit/fdf82a7856b32d905c39afc85e34364491e46346Mitigation, Patch, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2018/10/msg00003.htmlMailing List, Third Party Advisory
- https://usn.ubuntu.com/3775-1/Third Party Advisory
- https://usn.ubuntu.com/3775-2/Third Party Advisory
- https://usn.ubuntu.com/3776-1/Third Party Advisory
- https://usn.ubuntu.com/3776-2/Third Party Advisory
- https://usn.ubuntu.com/3777-1/Third Party Advisory
- https://usn.ubuntu.com/3777-2/Third Party Advisory
- https://usn.ubuntu.com/3777-3/Third Party Advisory
- https://www.debian.org/security/2018/dsa-4308Third Party Advisory
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=fdf82a7856b32d905c39afc85e34364491e46346Mitigation, Patch, Vendor Advisory
- https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.18.1Mitigation, Patch, Vendor Advisory
- https://github.com/torvalds/linux/commit/fdf82a7856b32d905c39afc85e34364491e46346Mitigation, Patch, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2018/10/msg00003.htmlMailing List, Third Party Advisory
- https://usn.ubuntu.com/3775-1/Third Party Advisory
- https://usn.ubuntu.com/3775-2/Third Party Advisory
- https://usn.ubuntu.com/3776-1/Third Party Advisory
- https://usn.ubuntu.com/3776-2/Third Party Advisory
- https://usn.ubuntu.com/3777-1/Third Party Advisory
- https://usn.ubuntu.com/3777-2/Third Party Advisory
- https://usn.ubuntu.com/3777-3/Third Party Advisory
- https://www.debian.org/security/2018/dsa-4308Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is 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.
How severe is CVE-2018-15572?
Severity scoring for CVE-2018-15572 is pending analysis. The EPSS model estimates a 0.51% probability of exploitation in the next 30 days.
How do I fix CVE-2018-15572?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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Are you affected by CVE-2018-15572?
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Scan your code nowSource: NVD / NIST