CVE-2017-16939
HighThe XFRM dump policy implementation in net/xfrm/xfrm_user.c in the Linux kernel before 4.13.11 allows local users to gain privileges or cause a denial of service (use-after-free) via a crafted SO_RCVBUF setsockopt system call in conjunction with XFRM_MSG_GETPOLICY Netlink messages.
CVSS 3.1 score
7.8
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness type
CWE-416CVE-2017-16939 is a Use After Free vulnerability
What is Use After Free?
The product references memory after it has been freed, which may cause it to crash, use unexpected values, or execute code. Learn more on MITRE CWE
References
The following references provide additional information about CVE-2017-16939 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.
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Mailing List Third Party Advisory
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Mailing List Third Party Advisory
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Securityfocushttp://www.securityfocus.com/bid/101954Third Party Advisory VDB Entry
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Third Party Advisory
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Third Party Advisory
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Third Party Advisory
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Third Party Advisory
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Issue Tracking Third Party Advisory
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Third Party Advisory
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Debian Securityhttps://www.debian.org/security/2018/dsa-4082Third Party Advisory
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PatchKernel patch commithttp://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=1137b5e2529a8f5ca8ee709288ecba3e68044df2
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PatchKernel patch commithttp://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.13.11
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PatchKernel patch commithttps://blogs.securiteam.com/index.php/archives/3535
Frequently asked questions
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What is CVE-2017-16939?
CVE-2017-16939 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10 , classified as an Use After Free flaw (CWE-416) . CVE-2017-16939 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
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What is the CVSS score for CVE-2017-16939?
CVE-2017-16939 has a CVSS score of 7.8 out of 10, rated High severity (CVSS 3.1). The vector string is
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H. -
Is there a patch available for CVE-2017-16939?
No patch is currently available for CVE-2017-16939. Monitor the NIST NVD and your Linux distribution's security advisories for updates.
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Is CVE-2017-16939 actively exploited?
No — CVE-2017-16939 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.
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What is Use After Free (CWE-416)?
The product references memory after it has been freed, which may cause it to crash, use unexpected values, or execute code. View CWE-416 on MITRE CWE →