CVE-2022-0306 [High] | Out-of-bounds Write in Chrome

CVE-2022-0306 is rated High Risk (75.1/100): CVSS High severity, with high exploitation likelihood (EPSS 85.35%, 100th percentile). EPSS ranks this CVE among the most likely to be exploited in the near term. EPSS rose +79.68% over the last day, indicating growing attacker interest. High exploitation likelihood—assess exposure and prioritize remediation.

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2026-06-15	5.67%	85.35%	+79.68%
2	2026-05-28	6.47%	5.67%	-0.80%
3	2025-11-21	—	6.47%	—

Date

Old EPSS score

New EPSS score

Delta (New - Old)

2026-06-15

5.67%

85.35%

+79.68%

2026-05-28

6.47%

5.67%

-0.80%

2025-11-21

—

6.47%

—

Base score	Version	Severity	Vector	Exploitability	Impact	Score source
8.8	3.1	HIGH	`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H` Click to expand Attack vector (AV:N) Could be attacked over the internet or any normal routed network—not just someone sitting at the machine. Attack complexity (AC:L) Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup. Privileges required (PR:N) No account or special rights needed—anonymous or random user is enough. User interaction (UI:R) A real person has to do something—click, install, enable—otherwise it doesn’t land. Scope (S:U) Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems. Confidentiality (C:H) Serious risk that confidential data gets exposed in a big way. Integrity (I:H) They could widely tamper with or forge data—trust in the data is badly hurt. Availability (A:H) Could take the service down hard or make it unusable for people who depend on it.	2.8	5.9	[email protected]
6.8	2.0	MEDIUM	`AV:N/AC:M/Au:N/C:P/I:P/A:P` Click to expand Access vector (AV:N) Can be exploited remotely over network reachability. Access complexity (AC:M) Exploitation needs some favorable conditions, but not exceptional ones. Authentication (AU:N) No authentication is required. Confidentiality impact (C:P) Partial confidentiality impact. Integrity impact (I:P) Partial integrity impact. Availability impact (A:P) Partial availability impact.	8.6	6.4	[email protected]

Base score

Version

Severity

Vector

Exploitability

Impact

Score source

8.8

3.1

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Click to expand

Attack vector (AV:N): Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L): Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N): No account or special rights needed—anonymous or random user is enough.
User interaction (UI:R): A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:U): Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H): Serious risk that confidential data gets exposed in a big way.
Integrity (I:H): They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H): Could take the service down hard or make it unusable for people who depend on it.

2.8

5.9

[email protected]

6.8

2.0

MEDIUM

AV:N/AC:M/Au:N/C:P/I:P/A:P Click to expand

Access vector (AV:N): Can be exploited remotely over network reachability.
Access complexity (AC:M): Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N): No authentication is required.
Confidentiality impact (C:P): Partial confidentiality impact.
Integrity impact (I:P): Partial integrity impact.
Availability impact (A:P): Partial availability impact.

8.6

6.4

[email protected]

OS Trackers for CVE-2022-0306

vendor	priority	summary	link
`alpine`	high	CVE-2022-0306: 1 source package rows (qt5-qtwebengine); 7 state rows across 7 repos (3.17-community, 3.18-community, 3.19-community, 3.20-community, 3.21-community, 3.22-community, edge-community); fixed 7, open 0.	https://security.alpinelinux.org/vuln/CVE-2022-0306
`debian`	not yet assigned	CVE-2022-0306 not yet assigned priority: Debian including 1 source packages (chromium), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5.	https://security-tracker.debian.org/tracker/CVE-2022-0306
`gentoo`	high	CVE-2022-0306: 1 GLSA(s) (202201-02), 2 atom(s) (www-client/chromium, www-client/google-chrome); latest impact high.	https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2022-0306
`ubuntu`	medium	CVE-2022-0306 medium priority: Ubuntu including 1 source packages (chromium-browser), 7 status rows across 7 suites (bionic, focal, impish, jammy, trusty, upstream, xenial): DNE 2, not-affected 2, released 2, ignored 1.	https://ubuntu.com/security/CVE-2022-0306

Affected software / configurations for CVE-2022-0306

Vendor	Product	Version	Raw CPE
google	chrome	< 97.0.4692.99	cpe:2.3:a:google:chrome::::::::

References for CVE-2022-0306

URL	Tags
http://packetstormsecurity.com/files/166367/Chrome-chrome_pdf-PDFiumEngine-RequestThumbnail-Heap-Buffer-Overflow.html	Third Party Advisory VDB Entry
https://chromereleases.googleblog.com/2022/01/stable-channel-update-for-desktop_19.html	Release Notes Vendor Advisory
https://crbug.com/1283198	Issue Tracking Permissions Required Third Party Advisory

URL

CVE-2022-0306

Exploit prediction scoring system (EPSS) score for CVE-2022-0306

Common vulnerability scoring system (CVSS) metrics for CVE-2022-0306

Weakness enumeration for CVE-2022-0306

OS Trackers for CVE-2022-0306

Affected software / configurations for CVE-2022-0306

References for CVE-2022-0306