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Vulnerability details: VCID-dwh7-f377-qfgh
Vulnerability ID VCID-dwh7-f377-qfgh
Aliases CVE-2021-38498
Summary During process shutdown, a document could have caused a use-after-free of a languages service object, leading to memory corruption and a potentially exploitable crash.
Status Published
Exploitability 0.5
Weighted Severity 8.0
Risk 4.0
Affected and Fixed Packages Package Details
Weaknesses (1)
CWE-416 Use After Free
System Score Found at
cvssv3 7.5 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-38498.json
epss 0.00262 https://api.first.org/data/v1/epss?cve=CVE-2021-38498
epss 0.00262 https://api.first.org/data/v1/epss?cve=CVE-2021-38498
epss 0.00262 https://api.first.org/data/v1/epss?cve=CVE-2021-38498
epss 0.00262 https://api.first.org/data/v1/epss?cve=CVE-2021-38498
epss 0.00262 https://api.first.org/data/v1/epss?cve=CVE-2021-38498
epss 0.00262 https://api.first.org/data/v1/epss?cve=CVE-2021-38498
epss 0.00262 https://api.first.org/data/v1/epss?cve=CVE-2021-38498
epss 0.00262 https://api.first.org/data/v1/epss?cve=CVE-2021-38498
epss 0.00523 https://api.first.org/data/v1/epss?cve=CVE-2021-38498
epss 0.00523 https://api.first.org/data/v1/epss?cve=CVE-2021-38498
epss 0.00523 https://api.first.org/data/v1/epss?cve=CVE-2021-38498
epss 0.00523 https://api.first.org/data/v1/epss?cve=CVE-2021-38498
epss 0.00523 https://api.first.org/data/v1/epss?cve=CVE-2021-38498
epss 0.00523 https://api.first.org/data/v1/epss?cve=CVE-2021-38498
epss 0.00523 https://api.first.org/data/v1/epss?cve=CVE-2021-38498
epss 0.00523 https://api.first.org/data/v1/epss?cve=CVE-2021-38498
epss 0.00523 https://api.first.org/data/v1/epss?cve=CVE-2021-38498
epss 0.00523 https://api.first.org/data/v1/epss?cve=CVE-2021-38498
epss 0.00523 https://api.first.org/data/v1/epss?cve=CVE-2021-38498
cvssv3.1 6.1 https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
cvssv2 5.0 https://nvd.nist.gov/vuln/detail/CVE-2021-38498
cvssv3.1 7.5 https://nvd.nist.gov/vuln/detail/CVE-2021-38498
archlinux High https://security.archlinux.org/AVG-2443
archlinux High https://security.archlinux.org/AVG-2459
generic_textual high https://www.mozilla.org/en-US/security/advisories/mfsa2021-43
generic_textual high https://www.mozilla.org/en-US/security/advisories/mfsa2021-45
generic_textual high https://www.mozilla.org/en-US/security/advisories/mfsa2021-47
Reference id Reference type URL
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-38498.json
https://api.first.org/data/v1/epss?cve=CVE-2021-38498
https://bugzilla.mozilla.org/show_bug.cgi?id=1729642
https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
https://www.mozilla.org/security/advisories/mfsa2021-43/
https://www.mozilla.org/security/advisories/mfsa2021-45/
https://www.mozilla.org/security/advisories/mfsa2021-47/
2011099 https://bugzilla.redhat.com/show_bug.cgi?id=2011099
AVG-2443 https://security.archlinux.org/AVG-2443
AVG-2459 https://security.archlinux.org/AVG-2459
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:*:*:*:*:*:*:*:*
CVE-2021-38498 https://nvd.nist.gov/vuln/detail/CVE-2021-38498
mfsa2021-43 https://www.mozilla.org/en-US/security/advisories/mfsa2021-43
mfsa2021-45 https://www.mozilla.org/en-US/security/advisories/mfsa2021-45
mfsa2021-47 https://www.mozilla.org/en-US/security/advisories/mfsa2021-47
RHSA-2021:3755 https://access.redhat.com/errata/RHSA-2021:3755
RHSA-2021:3756 https://access.redhat.com/errata/RHSA-2021:3756
RHSA-2021:3757 https://access.redhat.com/errata/RHSA-2021:3757
RHSA-2021:3791 https://access.redhat.com/errata/RHSA-2021:3791
RHSA-2021:3838 https://access.redhat.com/errata/RHSA-2021:3838
RHSA-2021:3839 https://access.redhat.com/errata/RHSA-2021:3839
RHSA-2021:3840 https://access.redhat.com/errata/RHSA-2021:3840
RHSA-2021:3841 https://access.redhat.com/errata/RHSA-2021:3841
USN-5107-1 https://usn.ubuntu.com/5107-1/
USN-5132-1 https://usn.ubuntu.com/5132-1/
USN-5248-1 https://usn.ubuntu.com/5248-1/
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-38498.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:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N 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:N/I:N/A:P Found at https://nvd.nist.gov/vuln/detail/CVE-2021-38498
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:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://nvd.nist.gov/vuln/detail/CVE-2021-38498
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 0.49391
EPSS Score 0.00262
Published At Aug. 10, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2025-07-31T08:09:46.524780+00:00 Mozilla Importer Import https://github.com/mozilla/foundation-security-advisories/blob/master/announce/2021/mfsa2021-47.yml 37.0.0