CVE-2016-6828

The tcp_check_send_head function in include/net/tcp.h in the Linux kernel before 4.7.5 does not properly maintain certain SACK state after a failed data copy, which allows local users to cause a denial of service (tcp_xmit_retransmit_queue use-after-free and system crash) via a crafted SACK option.

CVSS v3.0 NVD

5.5 MEDIUMCVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS v2.0 NVD

4.9 MEDIUMAV:L/AC:L/Au:N/C:N/I:N/A:C

EPSS

1.18% chance of exploitation in the next 30 days, 67th percentile

Published

2016-10-16

Updated

2024-08-06

Proof-of-concept exploits (1)

• http://www.openwall.com/lists/oss-security/2016/08/15/1

ExploitDB entries (1)

• https://www.exploit-db.com/exploits/40731

Security advisories

• http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.7.5
• https://bugzilla.redhat.com/show_bug.cgi?id=1367091
• http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=bb1fceca2249210…
• torvalds/linux/commit/bb1fceca22492109be12640d49f5ea5a544c6bb4
• http://www.securityfocus.com/bid/92452

References

• CVE Record
• NVD entry