kernel: aarch64: copying from /dev/zero causes local DoS
Published Nov 30, 2014
4.9
MEDIUMCVSS 2.0
EPSS 0.37%
Description
The __clear_user function in arch/arm64/lib/clear_user.S in the Linux kernel before 3.17.4 on the ARM64 platform allows local users to cause a denial of service (system crash) by reading one byte beyond a /dev/zero page boundary.
Affected products
No data.
- ≤ 3.17.3
No data.
Red Hat Enterprise Linux 5
kernel
Not affected
Red Hat Enterprise Linux 6
kernel
Not affected
Red Hat Enterprise Linux 7
kernel
Not affected
Red Hat Enterprise MRG 2
realtime-kernel
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 5 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 6 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 7 | kernel | Not affected | n/a |
| Red Hat Enterprise MRG 2 | realtime-kernel | Not affected | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
Not vulnerable. This issue does not affect the Linux kernel packages as shipped with Red Hat Enterprise Linux 5, 6, 7 and Red Hat Enterprise MRG 2.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
No CVSS v3.0 score for this CVE.
AV:L/AC:L/Au:N/C:N/I:N/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 (9 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 0.37% (0.00374) | 28.91th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.37% (0.00374) | 28.92th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.10% (0.00096) | 24.68th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.04% (0.00042) | 5.07th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.04% (0.00042) | 5.63th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.03% (0.01034) | 41.69th | v2 (v2022.01.01) |
| Sep 10, 2022 | 1.03% (0.01034) | 39.91th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.03% (0.01034) | 37.91th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.03% (0.01034) | 20.32th | v2 (v2022.01.01) |
References (10)
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=97fc15436b36ee3956efad83e22a557991f7d19d x_refsource_CONFIRM
- http://secunia.com/advisories/62305 third-party-advisoryx_refsource_SECUNIA
- http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.17.4 x_refsource_CONFIRMVendor Advisory
- http://www.openwall.com/lists/oss-security/2014/11/13/5 mailing-listx_refsource_MLIST
- http://www.securityfocus.com/bid/71082 vdb-entryx_refsource_BID
- https://access.redhat.com/security/cve/CVE-2014-7843 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1163744 x_refsource_CONFIRMPatchVendor AdvisoryIssue Tracking
- https://github.com/torvalds/linux/commit/97fc15436b36ee3956efad83e22a557991f7d19d x_refsource_CONFIRMPatchVendor Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2014-7843
- https://www.cve.org/CVERecord?id=CVE-2014-7843
| Link | Providers | Tags |
|---|---|---|
| http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=97fc15436b36ee3956efad83e22a557991f7d19d | x_refsource_CONFIRM | |
| http://secunia.com/advisories/62305 | third-party-advisoryx_refsource_SECUNIA | |
| http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.17.4 | x_refsource_CONFIRMVendor Advisory | |
| http://www.openwall.com/lists/oss-security/2014/11/13/5 | mailing-listx_refsource_MLIST | |
| http://www.securityfocus.com/bid/71082 | vdb-entryx_refsource_BID | |
| https://access.redhat.com/security/cve/CVE-2014-7843 | Vendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1163744 | x_refsource_CONFIRMPatchVendor AdvisoryIssue Tracking | |
| https://github.com/torvalds/linux/commit/97fc15436b36ee3956efad83e22a557991f7d19d | x_refsource_CONFIRMPatchVendor Advisory | |
| https://nvd.nist.gov/vuln/detail/CVE-2014-7843 | ||
| https://www.cve.org/CVERecord?id=CVE-2014-7843 |
Change history (0)
No recorded changes yet.