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CVE-2023-5217

HIGH
8.8
CVSS Score
Published: September 28, 2023 at 03:23 PM UTC
Updated: June 17, 2026 at 06:48 AM UTC
12 products affected across 8 vendorsDebian LinuxChromeFedora

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Severity
HIGH8.8
Exploitation
CISA KEV
Exploit prediction
EPSS 49%
SSVC
Active

Actively Exploited

CISA Known Exploited Vulnerabilities (KEV) Catalog

EPSS Score49.0%

EPSS (Exploit Prediction Scoring System) estimates a 49.0% chance this CVE is exploited in the wild within the next 30 days — higher than 99% of all CVEs. It complements CVSS: a high EPSS on a mid-severity CVE can still be urgent.

Google Chromium libvpx contains a heap buffer overflow vulnerability in vp8 encoding that allows a remote attacker to potentially exploit heap corruption via a crafted HTML page. This vulnerability could impact web browsers using libvpx, including but not limited to Google Chrome.

Required Action
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Ransomware Use
Unknown
Added to KEV
Oct 2, 2023
Remediation Due
Oct 23, 2023
1099 days overdue
Notes
https://chromereleases.googleblog.com/2023/09/stable-channel-update-for-desktop_27.html
https://nvd.nist.gov/vuln/detail/CVE-2023-5217

Description

Heap buffer overflow in vp8 encoding in libvpx in Google Chrome prior to 117.0.5938.132 and libvpx 1.13.1 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page. (Chromium security severity: High)

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

iPadOS· Apple
95%
17.0 ≤ v < 17.0.316.7
Affected range stops below 17.0.3, so it looks safe — our inference, not a vendor statement
iPhone OS· Apple
95%
17.0 ≤ v < 17.0.316.7
Affected range stops below 17.0.3, so it looks safe — our inference, not a vendor statement
Debian Linux· Debiandrupal
95%
10.011.012.0
Fedora· Fedora Projectrpm
95%
373839
Chrome· Googlenpm
95%
v < 117.0.5938.132
Affected range stops below 117.0.5938.132, so it looks safe — our inference, not a vendor statement
Edge· Microsoft
95%
116.0.1938.98117.0.2045.47
Edge Chromium· Microsoft
95%
116.0.5845.229117.0.5938.132
Firefox· Mozilla
95%
v < 115.3.1v < 118.0.1v < 118.1
Affected range stops below 115.3.1, so it looks safe — our inference, not a vendor statement
Affected range stops below 118.0.1, so it looks safe — our inference, not a vendor statement
Affected range stops below 118.1, so it looks safe — our inference, not a vendor statement
Thunderbird· Mozilla
95%
v < 115.3.1
Affected range stops below 115.3.1, so it looks safe — our inference, not a vendor statement
Enterprise Linux· Red Hatrpm
95%
9.0

References (53)

Mailing ListThird Party Advisory
Source: [email protected]
http://seclists.org/fulldisclosure/2023/Oct/12
Mailing ListThird Party Advisory
Source: [email protected]
http://seclists.org/fulldisclosure/2023/Oct/16
Mailing ListPatchThird Party Advisory
Source: [email protected]
http://www.openwall.com/lists/oss-security/2023/09/28/5
Mailing ListPatchThird Party Advisory
Source: [email protected]
http://www.openwall.com/lists/oss-security/2023/09/28/6
Mailing ListThird Party Advisory
Source: [email protected]
http://www.openwall.com/lists/oss-security/2023/09/29/1
Mailing ListThird Party Advisory
Source: [email protected]
http://www.openwall.com/lists/oss-security/2023/09/29/11
Mailing ListThird Party Advisory
Source: [email protected]
http://www.openwall.com/lists/oss-security/2023/09/29/12
Mailing ListThird Party Advisory
Source: [email protected]
http://www.openwall.com/lists/oss-security/2023/09/29/14

SSVC — Action Prioritization

SSVCActiveNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

8.8HIGHCISA-ADP
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusANALYZED
CWE
CWE-787

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