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Vulnerability details: VCID-bq5r-ay4d-vqay
Vulnerability ID VCID-bq5r-ay4d-vqay
Aliases CVE-2023-6205
Summary It was possible to cause the use of a MessagePort after it had already been freed, which could potentially have led to an 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-2023-6205.json
epss 0.00473 https://api.first.org/data/v1/epss?cve=CVE-2023-6205
epss 0.00473 https://api.first.org/data/v1/epss?cve=CVE-2023-6205
epss 0.00473 https://api.first.org/data/v1/epss?cve=CVE-2023-6205
epss 0.00473 https://api.first.org/data/v1/epss?cve=CVE-2023-6205
epss 0.00473 https://api.first.org/data/v1/epss?cve=CVE-2023-6205
epss 0.00473 https://api.first.org/data/v1/epss?cve=CVE-2023-6205
epss 0.00473 https://api.first.org/data/v1/epss?cve=CVE-2023-6205
epss 0.00473 https://api.first.org/data/v1/epss?cve=CVE-2023-6205
epss 0.00473 https://api.first.org/data/v1/epss?cve=CVE-2023-6205
epss 0.00473 https://api.first.org/data/v1/epss?cve=CVE-2023-6205
epss 0.00473 https://api.first.org/data/v1/epss?cve=CVE-2023-6205
epss 0.00473 https://api.first.org/data/v1/epss?cve=CVE-2023-6205
epss 0.00473 https://api.first.org/data/v1/epss?cve=CVE-2023-6205
epss 0.00473 https://api.first.org/data/v1/epss?cve=CVE-2023-6205
epss 0.00473 https://api.first.org/data/v1/epss?cve=CVE-2023-6205
epss 0.00473 https://api.first.org/data/v1/epss?cve=CVE-2023-6205
epss 0.00473 https://api.first.org/data/v1/epss?cve=CVE-2023-6205
epss 0.00486 https://api.first.org/data/v1/epss?cve=CVE-2023-6205
ssvc Track https://bugzilla.mozilla.org/show_bug.cgi?id=1854076
ssvc Track https://lists.debian.org/debian-lts-announce/2023/11/msg00017.html
ssvc Track https://lists.debian.org/debian-lts-announce/2023/11/msg00030.html
cvssv3.1 6.5 https://nvd.nist.gov/vuln/detail/CVE-2023-6205
ssvc Track https://www.debian.org/security/2023/dsa-5561
generic_textual high https://www.mozilla.org/en-US/security/advisories/mfsa2023-49
generic_textual high https://www.mozilla.org/en-US/security/advisories/mfsa2023-50
generic_textual high https://www.mozilla.org/en-US/security/advisories/mfsa2023-52
ssvc Track https://www.mozilla.org/security/advisories/mfsa2023-49/
ssvc Track https://www.mozilla.org/security/advisories/mfsa2023-50/
ssvc Track https://www.mozilla.org/security/advisories/mfsa2023-52/
Reference id Reference type URL
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2023-6205.json
https://api.first.org/data/v1/epss?cve=CVE-2023-6205
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-6204
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-6205
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-6206
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-6207
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-6208
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-6209
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-6212
2250897 https://bugzilla.redhat.com/show_bug.cgi?id=2250897
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:debian:debian_linux:10.0:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:12.0:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:debian:debian_linux:12.0:*:*:*:*:*:*:*
CVE-2023-6205 https://nvd.nist.gov/vuln/detail/CVE-2023-6205
dsa-5561 https://www.debian.org/security/2023/dsa-5561
mfsa2023-49 https://www.mozilla.org/en-US/security/advisories/mfsa2023-49
mfsa2023-49 https://www.mozilla.org/security/advisories/mfsa2023-49/
mfsa2023-50 https://www.mozilla.org/en-US/security/advisories/mfsa2023-50
mfsa2023-50 https://www.mozilla.org/security/advisories/mfsa2023-50/
mfsa2023-52 https://www.mozilla.org/en-US/security/advisories/mfsa2023-52
mfsa2023-52 https://www.mozilla.org/security/advisories/mfsa2023-52/
msg00017.html https://lists.debian.org/debian-lts-announce/2023/11/msg00017.html
msg00030.html https://lists.debian.org/debian-lts-announce/2023/11/msg00030.html
RHSA-2023:7499 https://access.redhat.com/errata/RHSA-2023:7499
RHSA-2023:7500 https://access.redhat.com/errata/RHSA-2023:7500
RHSA-2023:7501 https://access.redhat.com/errata/RHSA-2023:7501
RHSA-2023:7502 https://access.redhat.com/errata/RHSA-2023:7502
RHSA-2023:7503 https://access.redhat.com/errata/RHSA-2023:7503
RHSA-2023:7504 https://access.redhat.com/errata/RHSA-2023:7504
RHSA-2023:7505 https://access.redhat.com/errata/RHSA-2023:7505
RHSA-2023:7506 https://access.redhat.com/errata/RHSA-2023:7506
RHSA-2023:7507 https://access.redhat.com/errata/RHSA-2023:7507
RHSA-2023:7508 https://access.redhat.com/errata/RHSA-2023:7508
RHSA-2023:7509 https://access.redhat.com/errata/RHSA-2023:7509
RHSA-2023:7510 https://access.redhat.com/errata/RHSA-2023:7510
RHSA-2023:7511 https://access.redhat.com/errata/RHSA-2023:7511
RHSA-2023:7512 https://access.redhat.com/errata/RHSA-2023:7512
RHSA-2023:7547 https://access.redhat.com/errata/RHSA-2023:7547
RHSA-2023:7569 https://access.redhat.com/errata/RHSA-2023:7569
RHSA-2023:7570 https://access.redhat.com/errata/RHSA-2023:7570
RHSA-2023:7573 https://access.redhat.com/errata/RHSA-2023:7573
RHSA-2023:7574 https://access.redhat.com/errata/RHSA-2023:7574
RHSA-2023:7577 https://access.redhat.com/errata/RHSA-2023:7577
show_bug.cgi?id=1854076 https://bugzilla.mozilla.org/show_bug.cgi?id=1854076
USN-6509-1 https://usn.ubuntu.com/6509-1/
USN-6515-1 https://usn.ubuntu.com/6515-1/
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2023-6205.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: SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2024-11-25T19:19:02Z/ Found at https://bugzilla.mozilla.org/show_bug.cgi?id=1854076
Vector: SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2024-11-25T19:19:02Z/ Found at https://lists.debian.org/debian-lts-announce/2023/11/msg00017.html
Vector: SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2024-11-25T19:19:02Z/ Found at https://lists.debian.org/debian-lts-announce/2023/11/msg00030.html
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H Found at https://nvd.nist.gov/vuln/detail/CVE-2023-6205
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:P/P:M/B:A/M:M/D:T/2024-11-25T19:19:02Z/ Found at https://www.debian.org/security/2023/dsa-5561
Vector: SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2024-11-25T19:19:02Z/ Found at https://www.mozilla.org/security/advisories/mfsa2023-49/
Vector: SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2024-11-25T19:19:02Z/ Found at https://www.mozilla.org/security/advisories/mfsa2023-50/
Vector: SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2024-11-25T19:19:02Z/ Found at https://www.mozilla.org/security/advisories/mfsa2023-52/
Exploit Prediction Scoring System (EPSS)
Percentile 0.63703
EPSS Score 0.00473
Published At July 30, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2025-07-31T08:09:34.793952+00:00 Mozilla Importer Import https://github.com/mozilla/foundation-security-advisories/blob/master/announce/2023/mfsa2023-50.yml 37.0.0