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CVE-2018-14633

27
FAUCET Score

CVE-2018-14633 describes a stack buffer overflow in the Linux kernel's iSCSI target code, specifically within the chap_server_compute_md5() function, affecting various Linux distributions including Canonical, Debian, and Red Hat. This vulnerability, rated High severity (CVSS 7.0), allows an unauthenticated remote attacker to cause a denial-of-service or potentially unauthorized data access by smashing up to 17 bytes of the stack. While privilege escalation is considered unlikely, the attack requires the iSCSI target to be enabled. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
>= 3.1, < 3.16.59CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
>= 3.17, < 3.18.124CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
>= 3.19, < 4.4.159CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
>= 4.5, < 4.9.130CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
>= 4.10, < 4.14.73CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

7.0HIGH

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

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
HIGH
Exploitability Score
2.2
Impact Score
4.7
CvssVersion
3.0

Exploit Intelligence

EPSS Score
8.74%
Probability of exploitation in next 30 days
EPSS Percentile
94.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0874 is in the 74th percentile among its peer group of 8,920 CVEs.

Social Chatter

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

Remediation

Patch Available

Vendor Patches (6)

redhatpatch availablevia nvd_reference
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: kernel-rt-0:3.10.0-957.1.3.rt56.913.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: kernel-0:3.10.0-957.1.3.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7.4 Extended Update SupportFixed in: kernel-0:3.10.0-693.55.1.el7
View patch
redhatno patchvia redhat_api
Product: Red Hat Enterprise MRG 2Fixed in: kernel-rt
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: kernel-alt

Vendor Advisories (1)

redhatCVE-2018-14633Moderate

kernel: stack-based buffer overflow in chap_server_compute_md5() in iscsi target

Sep 24, 2018

References

access.redhat.com / errata/RHSA-2018:3651
Third Party Advisory
access.redhat.com / errata/RHSA-2018:3666
Third Party Advisory
access.redhat.com / errata/RHSA-2019:1946
Third Party Advisory
bugzilla.redhat.com / show_bug.cgi
Issue TrackingPatchThird Party Advisory
git.kernel.org / pub/scm/linux/kernel/git/mkp/scsi.git/commit
PatchVendor Advisory
git.kernel.org / pub/scm/linux/kernel/git/mkp/scsi.git/commit
PatchVendor Advisory
lists.debian.org / debian-lts-announce/2018/10/msg00003.html
Mailing ListThird Party Advisory
seclists.org / oss-sec/2018/q3/270
Mailing ListThird Party Advisory
usn.ubuntu.com / 3775-1
Third Party Advisory
usn.ubuntu.com / 3775-2
Third Party Advisory
usn.ubuntu.com / 3776-1
Third Party Advisory
usn.ubuntu.com / 3776-2
Third Party Advisory
usn.ubuntu.com / 3777-1
Third Party Advisory
usn.ubuntu.com / 3777-2
Third Party Advisory
usn.ubuntu.com / 3777-3
Third Party Advisory
usn.ubuntu.com / 3779-1
Third Party Advisory
debian.org / security/2018/dsa-4308
Third Party Advisory
securityfocus.com / bid/105388
Third Party AdvisoryVDB Entry