CVE-2018-15572

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.

6.5

CVSS

Severity: Medium

CVSS 3.0 •

CVSS 2.0 •

EPSS 0.08%

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Affected: n/a n/a

References

Link	Tags
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=fdf82a7856b32d905c39afc85e34364491e46346	patch vendor advisory mitigation
https://usn.ubuntu.com/3776-1/	third party advisory vendor advisory
https://usn.ubuntu.com/3776-2/	third party advisory vendor advisory
https://usn.ubuntu.com/3777-1/	third party advisory vendor advisory
https://github.com/torvalds/linux/commit/fdf82a7856b32d905c39afc85e34364491e46346	third party advisory patch mitigation
https://usn.ubuntu.com/3775-1/	third party advisory vendor advisory
https://lists.debian.org/debian-lts-announce/2018/10/msg00003.html	third party advisory mailing list
https://www.debian.org/security/2018/dsa-4308	third party advisory vendor advisory
https://usn.ubuntu.com/3775-2/	third party advisory vendor advisory
https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.18.1	patch vendor advisory mitigation
https://usn.ubuntu.com/3777-2/	third party advisory vendor advisory
https://usn.ubuntu.com/3777-3/	third party advisory vendor advisory

Frequently Asked Questions

What is the severity of CVE-2018-15572?: CVE-2018-15572 has been scored as a medium severity vulnerability.
How to fix CVE-2018-15572?: To fix CVE-2018-15572, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2018-15572 being actively exploited in the wild?: As for now, there are no information to confirm that CVE-2018-15572 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.