Vulnerability Description
A use-after-free flaw was found in fs/userfaultfd.c in the Linux kernel before 4.13.6. The issue is related to the handling of fork failure when dealing with event messages. Failure to fork correctly can lead to a situation where a fork event will be removed from an already freed list of events with userfaultfd_ctx_put().
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 4.11, < 4.13.6 |
Related Weaknesses (CWE)
References
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=384632Vendor Advisory
- http://www.securityfocus.com/bid/102516Third Party AdvisoryVDB Entry
- https://access.redhat.com/errata/RHSA-2018:0676Third Party Advisory
- https://access.redhat.com/errata/RHSA-2018:1062Third Party Advisory
- https://access.redhat.com/security/cve/CVE-2017-15126Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1523481Issue TrackingThird Party Advisory
- https://github.com/torvalds/linux/commit/384632e67e0829deb8015ee6ad916b180049d25Third Party Advisory
- https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.13.6Vendor Advisory
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=384632Vendor Advisory
- http://www.securityfocus.com/bid/102516Third Party AdvisoryVDB Entry
- https://access.redhat.com/errata/RHSA-2018:0676Third Party Advisory
- https://access.redhat.com/errata/RHSA-2018:1062Third Party Advisory
- https://access.redhat.com/security/cve/CVE-2017-15126Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1523481Issue TrackingThird Party Advisory
- https://github.com/torvalds/linux/commit/384632e67e0829deb8015ee6ad916b180049d25Third Party Advisory
FAQ
What is CVE-2017-15126?
CVE-2017-15126 is a vulnerability with a CVSS score of 8.1 (HIGH). A use-after-free flaw was found in fs/userfaultfd.c in the Linux kernel before 4.13.6. The issue is related to the handling of fork failure when dealing with event messages. Failure to fork correctly ...
How severe is CVE-2017-15126?
CVE-2017-15126 has been rated HIGH with a CVSS base score of 8.1/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2017-15126?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.