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Vulnerability details: VCID-z1m6-5ytt-8bf9
Vulnerability ID VCID-z1m6-5ytt-8bf9
Aliases CVE-2022-38478
Summary Members the Mozilla Fuzzing Team reported memory safety bugs present in Thunderbird 102.1 and Thunderbird 91.12. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code.
Status Published
Exploitability None
Weighted Severity None
Risk None
Affected and Fixed Packages Package Details
Weaknesses (1)
CWE-120 Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
System Score Found at
cvssv3 8.8 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2022-38478.json
epss 0.00272 https://api.first.org/data/v1/epss?cve=CVE-2022-38478
cvssv3.1 8.8 https://bugzilla.mozilla.org/buglist.cgi?bug_id=1770630%2C1776658
ssvc Track https://bugzilla.mozilla.org/buglist.cgi?bug_id=1770630%2C1776658
cvssv3.1 7.5 https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
generic_textual high https://www.mozilla.org/en-US/security/advisories/mfsa2022-33
generic_textual high https://www.mozilla.org/en-US/security/advisories/mfsa2022-34
generic_textual high https://www.mozilla.org/en-US/security/advisories/mfsa2022-35
generic_textual high https://www.mozilla.org/en-US/security/advisories/mfsa2022-36
generic_textual high https://www.mozilla.org/en-US/security/advisories/mfsa2022-37
cvssv3.1 8.8 https://www.mozilla.org/security/advisories/mfsa2022-33/
ssvc Track https://www.mozilla.org/security/advisories/mfsa2022-33/
cvssv3.1 8.8 https://www.mozilla.org/security/advisories/mfsa2022-34/
ssvc Track https://www.mozilla.org/security/advisories/mfsa2022-34/
cvssv3.1 8.8 https://www.mozilla.org/security/advisories/mfsa2022-35/
ssvc Track https://www.mozilla.org/security/advisories/mfsa2022-35/
cvssv3.1 8.8 https://www.mozilla.org/security/advisories/mfsa2022-36/
ssvc Track https://www.mozilla.org/security/advisories/mfsa2022-36/
cvssv3.1 8.8 https://www.mozilla.org/security/advisories/mfsa2022-37/
ssvc Track https://www.mozilla.org/security/advisories/mfsa2022-37/
Reference id Reference type URL
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2022-38478.json
https://api.first.org/data/v1/epss?cve=CVE-2022-38478
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-38472
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-38473
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-38478
https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
2120696 https://bugzilla.redhat.com/show_bug.cgi?id=2120696
buglist.cgi?bug_id=1770630%2C1776658 https://bugzilla.mozilla.org/buglist.cgi?bug_id=1770630%2C1776658
GLSA-202208-37 https://security.gentoo.org/glsa/202208-37
GLSA-202208-38 https://security.gentoo.org/glsa/202208-38
mfsa2022-33 https://www.mozilla.org/en-US/security/advisories/mfsa2022-33
mfsa2022-33 https://www.mozilla.org/security/advisories/mfsa2022-33/
mfsa2022-34 https://www.mozilla.org/en-US/security/advisories/mfsa2022-34
mfsa2022-34 https://www.mozilla.org/security/advisories/mfsa2022-34/
mfsa2022-35 https://www.mozilla.org/en-US/security/advisories/mfsa2022-35
mfsa2022-35 https://www.mozilla.org/security/advisories/mfsa2022-35/
mfsa2022-36 https://www.mozilla.org/en-US/security/advisories/mfsa2022-36
mfsa2022-36 https://www.mozilla.org/security/advisories/mfsa2022-36/
mfsa2022-37 https://www.mozilla.org/en-US/security/advisories/mfsa2022-37
mfsa2022-37 https://www.mozilla.org/security/advisories/mfsa2022-37/
RHSA-2022:6164 https://access.redhat.com/errata/RHSA-2022:6164
RHSA-2022:6165 https://access.redhat.com/errata/RHSA-2022:6165
RHSA-2022:6166 https://access.redhat.com/errata/RHSA-2022:6166
RHSA-2022:6167 https://access.redhat.com/errata/RHSA-2022:6167
RHSA-2022:6168 https://access.redhat.com/errata/RHSA-2022:6168
RHSA-2022:6169 https://access.redhat.com/errata/RHSA-2022:6169
RHSA-2022:6174 https://access.redhat.com/errata/RHSA-2022:6174
RHSA-2022:6175 https://access.redhat.com/errata/RHSA-2022:6175
RHSA-2022:6176 https://access.redhat.com/errata/RHSA-2022:6176
RHSA-2022:6177 https://access.redhat.com/errata/RHSA-2022:6177
RHSA-2022:6178 https://access.redhat.com/errata/RHSA-2022:6178
RHSA-2022:6179 https://access.redhat.com/errata/RHSA-2022:6179
USN-5581-1 https://usn.ubuntu.com/5581-1/
USN-5663-1 https://usn.ubuntu.com/5663-1/
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2022-38478.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

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none

high

low

none

high

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none
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Found at https://bugzilla.mozilla.org/buglist.cgi?bug_id=1770630%2C1776658
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

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none

high

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none

high

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none
Vector: SSVCv2/E:N/A:N/T:T/P:M/B:A/M:M/D:T/2025-04-15T17:19:42Z/ Found at https://bugzilla.mozilla.org/buglist.cgi?bug_id=1770630%2C1776658
Vector: CVSS:3.1/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

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none

high

low

none

high

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Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Found at https://www.mozilla.org/security/advisories/mfsa2022-33/
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

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none
Vector: SSVCv2/E:N/A:N/T:T/P:M/B:A/M:M/D:T/2025-04-15T17:19:42Z/ Found at https://www.mozilla.org/security/advisories/mfsa2022-33/
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Found at https://www.mozilla.org/security/advisories/mfsa2022-34/
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: SSVCv2/E:N/A:N/T:T/P:M/B:A/M:M/D:T/2025-04-15T17:19:42Z/ Found at https://www.mozilla.org/security/advisories/mfsa2022-34/
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Found at https://www.mozilla.org/security/advisories/mfsa2022-35/
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: SSVCv2/E:N/A:N/T:T/P:M/B:A/M:M/D:T/2025-04-15T17:19:42Z/ Found at https://www.mozilla.org/security/advisories/mfsa2022-35/
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Found at https://www.mozilla.org/security/advisories/mfsa2022-36/
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: SSVCv2/E:N/A:N/T:T/P:M/B:A/M:M/D:T/2025-04-15T17:19:42Z/ Found at https://www.mozilla.org/security/advisories/mfsa2022-36/
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Found at https://www.mozilla.org/security/advisories/mfsa2022-37/
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: SSVCv2/E:N/A:N/T:T/P:M/B:A/M:M/D:T/2025-04-15T17:19:42Z/ Found at https://www.mozilla.org/security/advisories/mfsa2022-37/
Exploit Prediction Scoring System (EPSS)
Percentile 0.50786
EPSS Score 0.00272
Published At May 29, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-05-29T08:26:47.618530+00:00 Mozilla Importer Import https://github.com/mozilla/foundation-security-advisories/blob/master/announce/2022/mfsa2022-37.yml 38.6.0