VulnerabilityModified
CVE-2017-15126
A use-after-free flaw was found in fs/userfaultfd.c in the Linux kernel before 4.13.6.
HIGH 8.1EPSS 4.08%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (4.08%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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 3.1
- 8.1 HIGHCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 4.08% probability · 90th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-119, CWE-416
- Affected
- linux/linux kernel
- Source
- secalert@redhat.com
References
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=384632e67e0829deb8015ee6ad916b180049d252Vendor Advisory
- http://www.securityfocus.com/bid/102516Third Party Advisory, VDB 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 Tracking, Third Party Advisory
- https://github.com/torvalds/linux/commit/384632e67e0829deb8015ee6ad916b180049d252Third 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=384632e67e0829deb8015ee6ad916b180049d252Vendor Advisory
- http://www.securityfocus.com/bid/102516Third Party Advisory, VDB 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 Tracking, Third Party Advisory
- https://github.com/torvalds/linux/commit/384632e67e0829deb8015ee6ad916b180049d252Third Party Advisory
- https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.13.6Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.