vulnwire
5.5med

CVE-2016-68281 exploit

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…

Published 10 y ago · modified 4 mo ago · JSON

CVSS
5.5
v3.0 · NVD
CISA KEV
No
not known exploited
EPSS
1.2%
percentile 68%
Public exploits
1
Exploit-DB

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.

Exploit prediction (EPSS)

1.18% probability of exploitation in the next 30 days, higher than 68% of all scored CVEs.

Exploits and detections

  • EDB-40731 Linux Kernel - TCP Related Read Use-After-Free · dos · 2016-08-18

CVSS scores

Assigned byVersionScoreVector
NVD3.05.5CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
NVD2.04.9AV:L/AC:L/Au:N/C:N/I:N/A:C

Classification

Weakness
Technology feeds
Linux kernel (RSS, critical only)

References

  • github.com /torvalds/linux/commit/bb1fceca22492109be12640d49f5ea5a544c6bb4 · x_refsource_CONFIRM, x_transferred
  • rhn.redhat.com /errata/RHSA-2017-0086.html · vendor-advisory, x_refsource_REDHAT, x_transferred
  • rhn.redhat.com /errata/RHSA-2017-0113.html · vendor-advisory, x_refsource_REDHAT, x_transferred
  • rhn.redhat.com /errata/RHSA-2017-0091.html · vendor-advisory, x_refsource_REDHAT, x_transferred
  • openwall.com /lists/oss-security/2016/08/15/1 · mailing-list, x_refsource_MLIST, x_transferred
  • securityfocus.com /bid/92452 · vdb-entry, x_refsource_BID, x_transferred
  • source.android.com /security/bulletin/2016-11-01.html · x_refsource_CONFIRM, x_transferred
  • rhn.redhat.com /errata/RHSA-2017-0036.html · vendor-advisory, x_refsource_REDHAT, x_transferred
  • marcograss.github.io /security/linux/2016/08/18/cve-2016-6828-linux-kernel-tcp-uaf.html · x_refsource_MISC, x_transferred
  • bugzilla.redhat.com /show_bug.cgi?id=1367091 · x_refsource_CONFIRM, x_transferred
  • kernel.org /pub/linux/kernel/v4.x/ChangeLog-4.7.5 · x_refsource_CONFIRM, x_transferred
  • git.kernel.org /cgit/linux/kernel/git/torvalds/linux.git/commit/?id=bb1fceca22492109be12640d49f5ea5a544c6 · x_refsource_CONFIRM, x_transferred

Sources

vulnwire keeps one entry per vulnerability: the CVE id wins, then GHSA; records that alias each other are merged. Machine-readable: JSON.