What’s Vulnerable › Vulnerabilities

CVE-2017-6346

• Severity: high (CVSS 7.0 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2017-03-01 · updated 2026-06-17
• Weakness: CWE-362

Description

Race condition in net/packet/af_packet.c in the Linux kernel before 4.9.13 allows local users to cause a denial of service (use-after-free) or possibly have unspecified other impact via a multithreaded application that makes PACKET_FANOUT setsockopt system calls.

Affected products

• Linux kernel: from 3.1 before 3.2.87; from 3.3 before 3.10.106; from 3.11 before 3.12.71; from 3.13 before 3.16.42; from 3.17 before 4.1.49; from 4.2 before 4.4.52 — fixed in 3.10.106, 3.12.71, 3.16.42, 3.2.87, 4.1.49, 4.4.52

How to fix

Upgrade to a fixed version: Linux kernel 3.10.106, 3.12.71, 3.16.42, 3.2.87. Check the vendor advisory for mitigations.

References

• http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=d199fab63c11998a602205f7ee7ff7c05c97164b
• http://www.debian.org/security/2017/dsa-3804
• http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.13
• http://www.openwall.com/lists/oss-security/2017/02/28/6
• http://www.securityfocus.com/bid/96508
• https://github.com/torvalds/linux/commit/d199fab63c11998a602205f7ee7ff7c05c97164b
• https://source.android.com/security/bulletin/2017-09-01
• http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=d199fab63c11998a602205f7ee7ff7c05c97164b
• http://www.debian.org/security/2017/dsa-3804
• http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.13
• http://www.openwall.com/lists/oss-security/2017/02/28/6
• http://www.securityfocus.com/bid/96508

Get alerted when CVE-2017-6346 or the next vulnerability affects your stack