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CVE-2018-7757

19
FAUCET Score

CVE-2018-7757 describes a memory leak vulnerability in the Linux kernel, specifically within the sas_smp_get_phy_events function in drivers/scsi/libsas/sas_expander.c, affecting versions through 4.15.7. This flaw allows local users to trigger a denial of service by repeatedly reading files in the /sys/class/sas_phy directory, leading to excessive memory consumption. Rated 5.5 MEDIUM, the vulnerability has a local attack vector with low complexity and no user interaction required, primarily impacting system availability. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 4.15.7CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

5.5MEDIUM

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

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
1.8
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
0.54%
Probability of exploitation in next 30 days
EPSS Percentile
42.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0054 is in the 93rd percentile among its peer group of 15,940 CVEs.

Social Chatter

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

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (7)

github_advisorypatch availablevia nvd_reference
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: kernel-rt-0:3.10.0-957.rt56.910.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: kernel-alt-0:4.14.0-115.el7a
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: kernel-0:3.10.0-957.el7
View patch
redhatvendor investigatingvia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: kernel
redhatno patchvia redhat_api
Product: Red Hat Enterprise MRG 2Fixed in: realtime-kernel
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: kernel

Vendor Advisories (1)

redhatCVE-2018-7757Low

kernel: Memory leak in the sas_smp_get_phy_events function in drivers/scsi/libsas/sas_expander.c

Mar 8, 2018

References

git.kernel.org / cgit/linux/kernel/git/torvalds/linux.git/commit
PatchVendor Advisory
access.redhat.com / errata/RHSA-2018:2948
access.redhat.com / errata/RHSA-2018:3083
access.redhat.com / errata/RHSA-2018:3096
github.com / torvalds/linux/commit/4a491b1ab11ca0556d2fda1ff1301e862a2d44c4
PatchThird Party Advisory
lists.debian.org / debian-lts-announce/2018/05/msg00000.html
usn.ubuntu.com / 3654-1
usn.ubuntu.com / 3654-2
usn.ubuntu.com / 3656-1
usn.ubuntu.com / 3697-1
usn.ubuntu.com / 3697-2
usn.ubuntu.com / 3698-1
usn.ubuntu.com / 3698-2
debian.org / security/2018/dsa-4187
debian.org / security/2018/dsa-4188
securityfocus.com / bid/103348
Third Party AdvisoryVDB Entry