vulnwire
7.8high

CVE-2016-9644

The __get_user_asm_ex macro in arch/x86/include/asm/uaccess.h in the Linux kernel 4.4.22 through 4.4.28 contains extended asm statements th…

Published 9 y ago · modified 4 mo ago · JSON

CVSS
7.8
v3.0 · NVD
CISA KEV
No
not known exploited
EPSS
1.5%
percentile 74%
Public exploits
0
none known

The __get_user_asm_ex macro in arch/x86/include/asm/uaccess.h in the Linux kernel 4.4.22 through 4.4.28 contains extended asm statements that are incompatible with the exception table, which allows local users to obtain root access on non-SMEP platforms via a crafted application. NOTE: this vulnerability exists because of incorrect backporting of the CVE-2016-9178 patch to older kernels.

Exploit prediction (EPSS)

1.45% probability of exploitation in the next 30 days, higher than 74% of all scored CVEs.

CVSS scores

Assigned byVersionScoreVector
NVD3.07.8CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
NVD2.09.3AV:N/AC:M/Au:N/C:C/I:C/A:C

Classification

Weakness
  • CWE-264 Permissions, Privileges, and Access Controls
Technology feeds
Linux kernel (RSS, critical only)

References

  • ubuntu.com /usn/USN-3146-2 · vendor-advisory, x_refsource_UBUNTU, x_transferred
  • securityfocus.com /bid/94545 · vdb-entry, x_refsource_BID, x_transferred
  • ubuntu.com /usn/USN-3146-1 · vendor-advisory, x_refsource_UBUNTU, x_transferred
  • openwall.com /lists/oss-security/2016/11/07/4 · mailing-list, x_refsource_MLIST, x_transferred
  • lwn.net /Articles/705220/ · x_refsource_CONFIRM, x_transferred

Sources

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