9.3

CVE-2016-9644: linux linux_kernel

Modified
AliasesUBUNTU-CVE-2016-9644
Published 28-11-2016Last modified 06-08-2024

Vulnerability summary

CVE-2016-9644 is a high (CVSS 9.3) vulnerability in linux linux_kernel. EPSS estimates a 1.45% chance of exploitation in the next 30 days, higher than 73.5% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 7.8, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
9.3/10
010
High · v2.0 (NVD)
EPSS score
1.45%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 3 · Related 3
USN-3146-1USN-3146-2USN-3161-4

Timeline

  1. 28-11-2016
    PublishedVulnerability first disclosed.
  2. 06-08-2024
    Last modifiedVulnerability information updated.

Description

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.

CVSS metrics

3 scores · 2 sources · 2 versions

EPSS trend

Probability

1.45%

Chance of exploitation in the next 30 days

Percentile

74%

Versus all other CVEs

30-day change

No change 0.00 pp

From 1.45% on 05-10-2026

05-10-202604-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: local access, no authentication, user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu3 products
  • linux< 3.13.0-145.194 | < 4.4.0-51.72
  • linux-lts-xenial< 4.4.0-51.72~14.04.1
  • linux-snapdragon< 4.4.0-1042.46
Linux1 product
  • linux_kernel4.4.22 | 4.4.23 | 4.4.24 | 4.4.25 | 4.4.26 | 4.4.27 | 4.4.28

2 vendors · 4 products

References

11 links
Show all 11 references