kernel: sys_sendto/sys_recvfrom does not validate the user provided ubuf pointer
Published May 2, 2016
7.8
HIGHCVSS 3.0
EPSS 0.39%
Description
net/socket.c in the Linux kernel 3.19 before 3.19.3 does not validate certain range data for (1) sendto and (2) recvfrom system calls, which allows local users to gain privileges by leveraging a subsystem that uses the copy_from_iter function in the iov_iter interface, as demonstrated by the Bluetooth subsystem.
Affected products
No data.
- 3.19
- 3.19.1
- 3.19.2
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 Linux 7
kernel-rt
Not affected
Red Hat Enterprise MRG 2
kernel-rt
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 Linux 7 | kernel-rt | Not affected | n/a |
| Red Hat Enterprise MRG 2 | kernel-rt | 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 Entereprise 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.
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
AV:L/AC:L/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 (9 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 0.39% (0.00385) | 30.16th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.39% (0.00385) | 30.11th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.08% (0.00082) | 21.72th | 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 | 1.28% (0.01282) | 68.34th | v2 (v2022.01.01) |
| Feb 22, 2023 | 1.28% (0.01282) | 68.05th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.28% (0.01282) | 65.91th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.28% (0.01282) | 41.72th | v2 (v2022.01.01) |
References (13)
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=4de930efc23b92ddf88ce91c405ee645fe6e27ea x_refsource_CONFIRM
- http://grsecurity.net/~spender/viro.txt x_refsource_MISC
- http://twitter.com/grsecurity/statuses/579050211605102592 x_refsource_MISC
- http://twitter.com/grsecurity/statuses/579060953477701632 x_refsource_MISC
- http://twitter.com/grsecurity/statuses/579075689439059968 x_refsource_MISC
- http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.19.3 x_refsource_CONFIRM
- http://www.openwall.com/lists/oss-security/2015/03/23/14 mailing-listx_refsource_MLIST
- http://www.securityfocus.com/bid/73286 vdb-entryx_refsource_BID
- https://access.redhat.com/security/cve/CVE-2015-2686 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1205242 x_refsource_CONFIRMIssue Tracking
- https://github.com/torvalds/linux/commit/4de930efc23b92ddf88ce91c405ee645fe6e27ea x_refsource_CONFIRM
- https://nvd.nist.gov/vuln/detail/CVE-2015-2686
- https://www.cve.org/CVERecord?id=CVE-2015-2686
Change history (0)
No recorded changes yet.