kernel: Use after free in sys_ioprio_get()
Published Nov 16, 2016
7.8
HIGHCVSS 3.1
EPSS 1.54%
Description
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.
Affected products
No data.
- < 3.2.85
- ≥ 3.3 · < 3.10.107
- ≥ 3.11 · < 3.12.70
- ≥ 3.13 · < 3.16.37
- ≥ 3.17 · < 3.18.38
- ≥ 3.19 · < 4.1.29
- ≥ 4.2 · < 4.4.17
- ≥ 4.5 · < 4.6.6
No data.
Red Hat Enterprise Linux 5
kernel
Not affected
Red Hat Enterprise Linux 6
kernel
Will not fix
Red Hat Enterprise Linux 7
kernel
Will not fix
Red Hat Enterprise Linux 7
kernel-rt
Will not fix
Red Hat Enterprise MRG 2
realtime-kernel
Will not fix
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 5 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 6 | kernel | Will not fix | n/a |
| Red Hat Enterprise Linux 7 | kernel | Will not fix | n/a |
| Red Hat Enterprise Linux 7 | kernel-rt | Will not fix | n/a |
| Red Hat Enterprise MRG 2 | realtime-kernel | Will not fix | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
This issue affects the versions of the Linux kernel as shipped with Red Hat Enterprise Linux 6, 7 and Red Hat Enterprise MRG 2. Future kernel updates for Red Hat Enterprise Linux 6, 7 and Red Hat Enterprise MRG 2 are not planning to be updated to address this issue. If this affects you please lodge a support request. Red Hat Enterprise Linux 5 is now in Production 3 phase of the support and maintenance life cycle. This issue is not currently planned to be addressed in future updates. For additional information, refer to the Red Hat Enterprise Linux Life Cycle: https://access.redhat.com/support/policy/updates/errata/.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
AV:N/AC:M/Au:N/C:C/I:C/A:C
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (10 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 1.54% (0.01541) | 74.00th | v5 (v2026.06.15) |
| Jun 15, 2026 | 1.54% (0.01541) | 71.58th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.13% (0.00130) | 29.95th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.08% (0.00081) | 36.57th | v3 (v2023.03.01) |
| Jun 22, 2024 | 0.08% (0.00081) | 35.01th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.08% (0.00081) | 33.00th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.02% (0.01018) | 40.69th | v2 (v2022.01.01) |
| Sep 10, 2022 | 1.02% (0.01018) | 38.88th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.02% (0.01018) | 36.86th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.02% (0.01018) | 19.50th | v2 (v2022.01.01) |
References (9)
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=8ba8682107ee2ca3347354e018865d8e1967c5f4 x_refsource_CONFIRMIssue TrackingPatchThird Party Advisory
- http://source.android.com/security/bulletin/2016-11-01.html x_refsource_CONFIRMThird Party Advisory
- http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.6.6 x_refsource_CONFIRMRelease NotesVendor Advisory
- http://www.securityfocus.com/bid/94135 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- https://access.redhat.com/security/cve/CVE-2016-7911 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1399722 Issue Tracking
- https://github.com/torvalds/linux/commit/8ba8682107ee2ca3347354e018865d8e1967c5f4 x_refsource_CONFIRMIssue TrackingPatchThird Party Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2016-7911
- https://www.cve.org/CVERecord?id=CVE-2016-7911
| Link | Providers | Tags |
|---|---|---|
| http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=8ba8682107ee2ca3347354e018865d8e1967c5f4 | x_refsource_CONFIRMIssue TrackingPatchThird Party Advisory | |
| http://source.android.com/security/bulletin/2016-11-01.html | x_refsource_CONFIRMThird Party Advisory | |
| http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.6.6 | x_refsource_CONFIRMRelease NotesVendor Advisory | |
| http://www.securityfocus.com/bid/94135 | vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry | |
| https://access.redhat.com/security/cve/CVE-2016-7911 | Vendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1399722 | Issue Tracking | |
| https://github.com/torvalds/linux/commit/8ba8682107ee2ca3347354e018865d8e1967c5f4 | x_refsource_CONFIRMIssue TrackingPatchThird Party Advisory | |
| https://nvd.nist.gov/vuln/detail/CVE-2016-7911 | ||
| https://www.cve.org/CVERecord?id=CVE-2016-7911 |
Change history (0)
No recorded changes yet.