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CVE-2015-2686

20
FAUCET Score

CVE-2015-2686 describes a local privilege escalation vulnerability in the Linux kernel versions 3.19 through 3.19.2. It stems from insufficient validation of range data within the sendto and recvfrom system calls, particularly when interacting with subsystems like Bluetooth that utilize the copy_from_iter function. Rated 7.8 HIGH on CVSS, this flaw allows a local attacker to gain full control (confidentiality, integrity, availability) of the affected system with low attack complexity. Despite its severity, there is no public exploit code available (Metasploit, Nuclei, ExploitDB), nor is there any evidence of active exploitation or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
3.19CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:3.19:*:*:*:*:*:*:*
3.19.1CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:3.19.1:*:*:*:*:*:*:*
3.19.2CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:3.19.2:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

7.8HIGH

CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
1.8
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
0.39%
Probability of exploitation in next 30 days
EPSS Percentile
31.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0039 is in the 70th percentile among its peer group of 17,070 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Advisories (1)

redhatCVE-2015-2686Important

kernel: sys_sendto/sys_recvfrom does not validate the user provided ubuf pointer

Mar 20, 2015

References

git.kernel.org / cgit/linux/kernel/git/torvalds/linux.git/commit
grsecurity.net / ~spender/viro.txt
bugzilla.redhat.com / show_bug.cgi
github.com / torvalds/linux/commit/4de930efc23b92ddf88ce91c405ee645fe6e27ea
twitter.com / grsecurity/statuses/579050211605102592
twitter.com / grsecurity/statuses/579060953477701632
twitter.com / grsecurity/statuses/579075689439059968
kernel.org / pub/linux/kernel/v3.x/ChangeLog-3.19.3
openwall.com / lists/oss-security/2015/03/23/14
securityfocus.com / bid/73286