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Vulnerability details: VCID-wy66-hxwv-aaap
Vulnerability ID VCID-wy66-hxwv-aaap
Aliases CVE-2021-29982
Summary Due to incorrect JIT optimization, we incorrectly interpreted data from the wrong type of object, resulting in the potential leak of a single bit of memory. This vulnerability affects Firefox < 91 and Thunderbird < 91.
Status Published
Exploitability 0.5
Weighted Severity 8.0
Risk 4.0
Affected and Fixed Packages Package Details
Weaknesses (1)
CWE-772 Missing Release of Resource after Effective Lifetime
System Score Found at
generic_textual Low http://people.canonical.com/~ubuntu-security/cve/2021/CVE-2021-29982.html
epss 0.00202 https://api.first.org/data/v1/epss?cve=CVE-2021-29982
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epss 0.00202 https://api.first.org/data/v1/epss?cve=CVE-2021-29982
epss 0.00202 https://api.first.org/data/v1/epss?cve=CVE-2021-29982
epss 0.00202 https://api.first.org/data/v1/epss?cve=CVE-2021-29982
epss 0.00202 https://api.first.org/data/v1/epss?cve=CVE-2021-29982
epss 0.00202 https://api.first.org/data/v1/epss?cve=CVE-2021-29982
epss 0.00202 https://api.first.org/data/v1/epss?cve=CVE-2021-29982
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epss 0.00206 https://api.first.org/data/v1/epss?cve=CVE-2021-29982
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epss 0.00207 https://api.first.org/data/v1/epss?cve=CVE-2021-29982
epss 0.00207 https://api.first.org/data/v1/epss?cve=CVE-2021-29982
epss 0.00207 https://api.first.org/data/v1/epss?cve=CVE-2021-29982
epss 0.00207 https://api.first.org/data/v1/epss?cve=CVE-2021-29982
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epss 0.00212 https://api.first.org/data/v1/epss?cve=CVE-2021-29982
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epss 0.00212 https://api.first.org/data/v1/epss?cve=CVE-2021-29982
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epss 0.00212 https://api.first.org/data/v1/epss?cve=CVE-2021-29982
epss 0.00212 https://api.first.org/data/v1/epss?cve=CVE-2021-29982
epss 0.00212 https://api.first.org/data/v1/epss?cve=CVE-2021-29982
epss 0.00212 https://api.first.org/data/v1/epss?cve=CVE-2021-29982
epss 0.00212 https://api.first.org/data/v1/epss?cve=CVE-2021-29982
epss 0.00212 https://api.first.org/data/v1/epss?cve=CVE-2021-29982
epss 0.00212 https://api.first.org/data/v1/epss?cve=CVE-2021-29982
epss 0.00237 https://api.first.org/data/v1/epss?cve=CVE-2021-29982
epss 0.00237 https://api.first.org/data/v1/epss?cve=CVE-2021-29982
epss 0.00249 https://api.first.org/data/v1/epss?cve=CVE-2021-29982
epss 0.00249 https://api.first.org/data/v1/epss?cve=CVE-2021-29982
epss 0.00383 https://api.first.org/data/v1/epss?cve=CVE-2021-29982
epss 0.00383 https://api.first.org/data/v1/epss?cve=CVE-2021-29982
epss 0.00383 https://api.first.org/data/v1/epss?cve=CVE-2021-29982
epss 0.00383 https://api.first.org/data/v1/epss?cve=CVE-2021-29982
epss 0.00383 https://api.first.org/data/v1/epss?cve=CVE-2021-29982
epss 0.00383 https://api.first.org/data/v1/epss?cve=CVE-2021-29982
epss 0.00383 https://api.first.org/data/v1/epss?cve=CVE-2021-29982
epss 0.00383 https://api.first.org/data/v1/epss?cve=CVE-2021-29982
epss 0.00383 https://api.first.org/data/v1/epss?cve=CVE-2021-29982
epss 0.00383 https://api.first.org/data/v1/epss?cve=CVE-2021-29982
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epss 0.00383 https://api.first.org/data/v1/epss?cve=CVE-2021-29982
epss 0.00383 https://api.first.org/data/v1/epss?cve=CVE-2021-29982
epss 0.00383 https://api.first.org/data/v1/epss?cve=CVE-2021-29982
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epss 0.00383 https://api.first.org/data/v1/epss?cve=CVE-2021-29982
epss 0.00383 https://api.first.org/data/v1/epss?cve=CVE-2021-29982
epss 0.00383 https://api.first.org/data/v1/epss?cve=CVE-2021-29982
epss 0.00383 https://api.first.org/data/v1/epss?cve=CVE-2021-29982
epss 0.00383 https://api.first.org/data/v1/epss?cve=CVE-2021-29982
epss 0.00383 https://api.first.org/data/v1/epss?cve=CVE-2021-29982
epss 0.00383 https://api.first.org/data/v1/epss?cve=CVE-2021-29982
epss 0.00383 https://api.first.org/data/v1/epss?cve=CVE-2021-29982
epss 0.00383 https://api.first.org/data/v1/epss?cve=CVE-2021-29982
epss 0.00383 https://api.first.org/data/v1/epss?cve=CVE-2021-29982
epss 0.00505 https://api.first.org/data/v1/epss?cve=CVE-2021-29982
generic_textual Low https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-29982
cvssv2 4.3 https://nvd.nist.gov/vuln/detail/CVE-2021-29982
cvssv3 6.5 https://nvd.nist.gov/vuln/detail/CVE-2021-29982
cvssv3.1 6.5 https://nvd.nist.gov/vuln/detail/CVE-2021-29982
archlinux High https://security.archlinux.org/AVG-2269
archlinux High https://security.archlinux.org/AVG-2291
generic_textual Medium https://ubuntu.com/security/notices/USN-5037-1
generic_textual high https://www.mozilla.org/en-US/security/advisories/mfsa2021-33
generic_textual Low https://www.mozilla.org/en-US/security/advisories/mfsa2021-33/#CVE-2021-29982
generic_textual high https://www.mozilla.org/en-US/security/advisories/mfsa2021-36
Reference id Reference type URL
http://people.canonical.com/~ubuntu-security/cve/2021/CVE-2021-29982.html
https://api.first.org/data/v1/epss?cve=CVE-2021-29982
https://bugzilla.mozilla.org/show_bug.cgi?id=1715318
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-29982
https://security.gentoo.org/glsa/202202-03
https://ubuntu.com/security/notices/USN-5037-1
https://www.mozilla.org/en-US/security/advisories/mfsa2021-33/#CVE-2021-29982
https://www.mozilla.org/security/advisories/mfsa2021-33/
https://www.mozilla.org/security/advisories/mfsa2021-36/
ASA-202108-14 https://security.archlinux.org/ASA-202108-14
AVG-2269 https://security.archlinux.org/AVG-2269
AVG-2291 https://security.archlinux.org/AVG-2291
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:thunderbird:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*
CVE-2021-29982 https://nvd.nist.gov/vuln/detail/CVE-2021-29982
mfsa2021-33 https://www.mozilla.org/en-US/security/advisories/mfsa2021-33
mfsa2021-36 https://www.mozilla.org/en-US/security/advisories/mfsa2021-36
USN-5037-1 https://usn.ubuntu.com/5037-1/
USN-5248-1 https://usn.ubuntu.com/5248-1/
No exploits are available.
Vector: AV:N/AC:M/Au:N/C:P/I:N/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2021-29982
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:R/S:U/C:H/I:N/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2021-29982
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:U/C:H/I:N/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2021-29982
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 0.39401
EPSS Score 0.00202
Published At March 28, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
There are no relevant records.