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Vulnerability details: VCID-y9bh-19ma-g7c6
Vulnerability ID VCID-y9bh-19ma-g7c6
Aliases CVE-2018-18493
Summary A buffer overflow can occur in the Skia library during buffer offset calculations with hardware accelerated canvas 2D actions due to the use of 32-bit calculations instead of 64-bit. This results in a potentially exploitable crash.
Status Published
Exploitability 0.5
Weighted Severity 9.0
Risk 4.5
Affected and Fixed Packages Package Details
Weaknesses (2)
CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer
CWE-120 Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
System Score Found at
cvssv3 9.8 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2018-18493.json
epss 0.07844 https://api.first.org/data/v1/epss?cve=CVE-2018-18493
epss 0.07844 https://api.first.org/data/v1/epss?cve=CVE-2018-18493
epss 0.07844 https://api.first.org/data/v1/epss?cve=CVE-2018-18493
epss 0.07844 https://api.first.org/data/v1/epss?cve=CVE-2018-18493
epss 0.07844 https://api.first.org/data/v1/epss?cve=CVE-2018-18493
epss 0.07844 https://api.first.org/data/v1/epss?cve=CVE-2018-18493
epss 0.07844 https://api.first.org/data/v1/epss?cve=CVE-2018-18493
epss 0.07844 https://api.first.org/data/v1/epss?cve=CVE-2018-18493
epss 0.07844 https://api.first.org/data/v1/epss?cve=CVE-2018-18493
epss 0.07844 https://api.first.org/data/v1/epss?cve=CVE-2018-18493
epss 0.07844 https://api.first.org/data/v1/epss?cve=CVE-2018-18493
epss 0.07844 https://api.first.org/data/v1/epss?cve=CVE-2018-18493
epss 0.07844 https://api.first.org/data/v1/epss?cve=CVE-2018-18493
epss 0.07844 https://api.first.org/data/v1/epss?cve=CVE-2018-18493
cvssv3 7.5 https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
cvssv2 7.5 https://nvd.nist.gov/vuln/detail/CVE-2018-18493
cvssv3 9.8 https://nvd.nist.gov/vuln/detail/CVE-2018-18493
archlinux Critical https://security.archlinux.org/AVG-833
generic_textual critical https://www.mozilla.org/en-US/security/advisories/mfsa2018-29
generic_textual critical https://www.mozilla.org/en-US/security/advisories/mfsa2018-30
generic_textual critical https://www.mozilla.org/en-US/security/advisories/mfsa2018-31
Reference id Reference type URL
https://access.redhat.com/errata/RHSA-2018:3831
https://access.redhat.com/errata/RHSA-2018:3833
https://access.redhat.com/errata/RHSA-2019:0159
https://access.redhat.com/errata/RHSA-2019:0160
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2018-18493.json
https://api.first.org/data/v1/epss?cve=CVE-2018-18493
https://bugzilla.mozilla.org/show_bug.cgi?id=1504452
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-12405
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-17466
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-18492
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-18493
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-18494
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-18498
https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
https://lists.debian.org/debian-lts-announce/2018/12/msg00002.html
https://security.gentoo.org/glsa/201903-04
https://www.debian.org/security/2018/dsa-4354
https://www.debian.org/security/2019/dsa-4362
https://www.mozilla.org/security/advisories/mfsa2018-29/
https://www.mozilla.org/security/advisories/mfsa2018-30/
https://www.mozilla.org/security/advisories/mfsa2018-31/
http://www.securityfocus.com/bid/106168
1658400 https://bugzilla.redhat.com/show_bug.cgi?id=1658400
ASA-201812-9 https://security.archlinux.org/ASA-201812-9
AVG-833 https://security.archlinux.org/AVG-833
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:18.10:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:canonical:ubuntu_linux:18.10:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux_desktop:6.0:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:redhat:enterprise_linux_desktop:6.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux_server:6.0:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:redhat:enterprise_linux_server:6.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux_server:7.0:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:redhat:enterprise_linux_server:7.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux_server_aus:7.6:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:redhat:enterprise_linux_server_aus:7.6:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux_server_eus:7.6:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:redhat:enterprise_linux_server_eus:7.6:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux_server_tus:7.6:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:redhat:enterprise_linux_server_tus:7.6:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux_workstation:6.0:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:redhat:enterprise_linux_workstation:6.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux_workstation:7.0:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:redhat:enterprise_linux_workstation:7.0:*:*:*:*:*:*:*
CVE-2018-18493 https://nvd.nist.gov/vuln/detail/CVE-2018-18493
mfsa2018-29 https://www.mozilla.org/en-US/security/advisories/mfsa2018-29
mfsa2018-30 https://www.mozilla.org/en-US/security/advisories/mfsa2018-30
mfsa2018-31 https://www.mozilla.org/en-US/security/advisories/mfsa2018-31
USN-3844-1 https://usn.ubuntu.com/3844-1/
USN-3868-1 https://usn.ubuntu.com/3868-1/
No exploits are available.
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2018-18493.json
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H Found at https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: AV:N/AC:L/Au:N/C:P/I:P/A:P Found at https://nvd.nist.gov/vuln/detail/CVE-2018-18493
Exploitability (E) Access Vector (AV) Access Complexity (AC) Authentication (Au) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

high

functional

unproven

proof_of_concept

not_defined

local

adjacent_network

network

high

medium

low

multiple

single

none

none

partial

complete

none

partial

complete

none

partial

complete
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Found at https://nvd.nist.gov/vuln/detail/CVE-2018-18493
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Exploit Prediction Scoring System (EPSS)
Percentile 0.91604
EPSS Score 0.07844
Published At Aug. 8, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2025-07-31T08:09:51.259254+00:00 Mozilla Importer Import https://github.com/mozilla/foundation-security-advisories/blob/master/announce/2018/mfsa2018-30.yml 37.0.0