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Fencer Intel
high 7.8

CVE-2016-7911 json

Race condition in the get_task_ioprio function in block/ioprio.c in the Linux kernel before 4.6.6 allows local users to gain privileges or…

published 2016-11-16 9 y ago modified 2026-06-17 4 mo ago also EUVD-2016-8760

cvss
7.8
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.6%
EPSS 1.6% chance of exploitation in 30 days, percentile 76%
public exploits
0
none known

Summary

Race condition in the get_task_ioprio function in block/ioprio.c in the Linux kernel before 4.6.6 allows local users to gain privileges or cause a denial of service (use-after-free) via a crafted ioprio_get system call.

Patch / fix

  • linux linux_kernel 3.2.85, 3.10.107, 3.12.70, 3.16.37, 3.18.38, 4.1.29, 4.4.17, 4.6.6
  • linux Debian 14, Debian 13, Debian 12 4.7.2-1

debian advisories DEBIAN-CVE-2016-7911

  • linux Ubuntu 14.04 LTS 3.13.0-109.156
  • linux Ubuntu 16.04 LTS 4.4.0-38.57
  • linux-raspi2 Ubuntu 16.04 LTS 4.4.0-1023.29
  • linux-lts-xenial Ubuntu 14.04 LTS 4.4.0-38.57~14.04.1
  • linux-snapdragon Ubuntu 16.04 LTS 4.4.0-1026.29

ubuntu advisories UBUNTU-CVE-2016-7911

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • kernel-rt SLE Real Time 11 SP4 3.0.101.rt130-68.1
  • kernel-syms-rt SLE Real Time 11 SP4 3.0.101.rt130-68.1
  • kernel-rt_trace SLE Real Time 11 SP4 3.0.101.rt130-68.1
  • kernel-source-rt SLE Real Time 11 SP4 3.0.101.rt130-68.1
  • kernel-ec2 SLES 11 SP3-LTSS, SLE Point of Sale 11 SP3, OpenStack Cloud 5 +2 more 3.0.101-0.47.96.1
  • kernel-pae SLES 11 SP3-LTSS, SLE Point of Sale 11 SP3 3.0.101-0.47.96.1
  • kernel-xen SLES 11 SP3-LTSS, SLE Point of Sale 11 SP3, OpenStack Cloud 5 +2 more 3.0.101-0.47.96.1
  • kernel-syms SLES 11 SP3-LTSS, SLE Point of Sale 11 SP3, OpenStack Cloud 5 +2 more 3.0.101-0.47.96.1

suse advisories SUSE-SU-2017:1102-1SUSE-SU-2017:0494-1SUSE-SU-2017:0471-1SUSE-SU-2017:0464-1SUSE-SU-2017:0437-1SUSE-SU-2017:0407-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2016-7911 updated cvss 4.7

kernel: Use after free in sys_ioprio_get()

  • Red Hat Enterprise Linux 6 perf, kernel, python-perf, kernel-kdump, kernel-firmware, kernel-bootwrapper, +1 more Red Hat Enterprise Linux 7 perf, kernel, bpftool, kernel-rt, python-perf, kernel-kdump, +8 more Red Hat Enterprise MRG 2 kernel-rt, mrg-rt-release, kernel-rt-trace, kernel-rt-vanilla, kernel-rt-firmware
    affected: no fix planned “Will not fix”
  • Red Hat Enterprise Linux 5 kernel
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

1.65% chance of exploitation in the next 30 days, higher than 76% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
NVD 2.0 9.3 AV:N/AC:M/Au:N/C:C/I:C/A:C

Classification

Weakness
  • CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization
  • CWE-416 Use After Free
Technology feeds

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.