CVE-2023-4863
Heap buffer overflow in libwebp in Google Chrome prior to 116.0.5845.187 and libwebp 1.3.2 allowed a remote attacker to perform an out of bounds memory write via a crafted HTML page. (Chromium
02 Description
Heap buffer overflow in libwebp in Google Chrome prior to 116.0.5845.187 and libwebp 1.3.2 allowed a remote attacker to perform an out of bounds memory write via a crafted HTML page. (Chromium
03 Exploitation and scoring
- Exploitation
- Exploited in the wild. Listed in the CISA Known Exploited Vulnerabilities catalog on 2023-09-13. Federal remediation due 2023-10-04.
- SSVC decision
- ExploitationactiveCISA reports credible evidence of active exploitation.
- AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
- Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.
- EPSS probability
- 99.97% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 99.9% of scored records. A rank, not a probability.
- NVD base score
- 8.8 (CVSS v3.x), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- NVD analysis status
- Analyzed. NVD last modified this record on 2026-06-17.
- Red Hat severity
- Important. Red Hat's rating for its own products, not a CVSS rating.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2023-09-12 14:24Z3 YR AGO
- Last updated
- 2025-10-21 23:05Z1 YR AGO
- Reserved
- 2023-09-09
- Assigning CNA
- Chrome
- Record state
- PUBLISHED
- Severity
- High (CVSS 8.8)
- CNA CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- Weaknesses
- Data version
- 5.1
- Document digest
- 4067a3a15cee9332fef9830903f641fa098b1a23dc1e9e968b1be7e5df2ec11b
05 Affected products
06 References
- chromereleases.googleblog.comhttps://chromereleases.googleblog.com/2023/09/stable-channel-update-for-desktop_11.html
- crbug.comhttps://crbug.com/1479274
- en.bandisoft.comhttps://en.bandisoft.com/honeyview/history/
- stackdiary.comhttps://stackdiary.com/critical-vulnerability-in-webp-codec-cve-2023-4863/
- www.mozilla.orghttps://www.mozilla.org/en-US/security/advisories/mfsa2023-40/
- github.comhttps://github.com/webmproject/libwebp/commit/902bc9190331343b2017211debcec8d2ab87e17a
- msrc.microsoft.comhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-4863
- security-tracker.debian.orghttps://security-tracker.debian.org/tracker/CVE-2023-4863
- bugzilla.suse.comhttps://bugzilla.suse.com/show_bug.cgi?id=1215231
- news.ycombinator.comhttps://news.ycombinator.com/item?id=37478403
- www.bleepingcomputer.comhttps://www.bleepingcomputer.com/news/google/google-fixes-another-chrome-zero-day-bug-exploited-in-attacks/
- www.debian.orghttps://www.debian.org/security/2023/dsa-5496
- www.debian.orghttps://www.debian.org/security/2023/dsa-5497
- lists.fedoraproject.orghttps://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/OZDGWWMJREPAGKWCJKSCM4WYLANSKIFX/
- lists.fedoraproject.orghttps://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/FYYKLG6CRGEDTNRBSU26EEWAO6D6U645/
- lists.fedoraproject.orghttps://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/PYZV7TMKF4QHZ54SFJX54BDN52VHGGCX/
- lists.debian.orghttps://lists.debian.org/debian-lts-announce/2023/09/msg00015.html
- lists.fedoraproject.orghttps://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/WHOLML7N2G5KCAZXFWC5IDFFHSQS5SDB/
- www.debian.orghttps://www.debian.org/security/2023/dsa-5498
- security.gentoo.orghttps://security.gentoo.org/glsa/202309-05
- lists.debian.orghttps://lists.debian.org/debian-lts-announce/2023/09/msg00016.html
- lists.fedoraproject.orghttps://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/6T655QF7CQ3DYAMPFV7IECQYGDEUIVVT/
- adamcaudill.comhttps://adamcaudill.com/2023/09/14/whose-cve-is-it-anyway/
- github.comhttps://github.com/webmproject/libwebp/releases/tag/v1.3.2
- lists.debian.orghttps://lists.debian.org/debian-lts-announce/2023/09/msg00017.html
- lists.fedoraproject.orghttps://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/KUQ7CTX3W372X3UY56VVNAHCH6H2F4X3/
- www.openwall.comhttp://www.openwall.com/lists/oss-security/2023/09/21/4
- blog.isosceles.comhttps://blog.isosceles.com/the-webp-0day/
- www.openwall.comhttp://www.openwall.com/lists/oss-security/2023/09/22/1
- www.openwall.comhttp://www.openwall.com/lists/oss-security/2023/09/22/3
- www.openwall.comhttp://www.openwall.com/lists/oss-security/2023/09/22/4
- www.openwall.comhttp://www.openwall.com/lists/oss-security/2023/09/22/5
- www.openwall.comhttp://www.openwall.com/lists/oss-security/2023/09/22/8
- www.openwall.comhttp://www.openwall.com/lists/oss-security/2023/09/22/7
- www.openwall.comhttp://www.openwall.com/lists/oss-security/2023/09/22/6
- www.openwall.comhttp://www.openwall.com/lists/oss-security/2023/09/26/1
- www.openwall.comhttp://www.openwall.com/lists/oss-security/2023/09/26/7
- www.openwall.comhttp://www.openwall.com/lists/oss-security/2023/09/28/1
- www.openwall.comhttp://www.openwall.com/lists/oss-security/2023/09/28/2
- www.openwall.comhttp://www.openwall.com/lists/oss-security/2023/09/28/4
- security.netapp.comhttps://security.netapp.com/advisory/ntap-20230929-0011/
- lists.fedoraproject.orghttps://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/WTRUIS3564P7ZLM2S2IH4Y4KZ327LI4I/
- sethmlarson.devhttps://sethmlarson.dev/security-developer-in-residence-weekly-report-16
- www.bentley.comhttps://www.bentley.com/advisories/be-2023-0001/
- security.gentoo.orghttps://security.gentoo.org/glsa/202401-10
- www.vicarius.iohttps://www.vicarius.io/vsociety/posts/zero-day-webp-vulnerability-cve-2023-4863
- www.cisa.govhttps://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-4863
07 Fixed in
AlmaLinux 8
- firefox Fixed in 102.15.1-1.el8_8.alma
- libwebp Fixed in 1.0.0-8.el8_8.1
- libwebp-devel Fixed in 1.0.0-8.el8_8.1
- thunderbird Fixed in 102.15.1-1.el8_8.alma
Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
AlmaLinux 9
- firefox Fixed in 102.15.1-1.el9_2.alma
- firefox-x11 Fixed in 102.15.1-1.el9_2.alma
- libwebp Fixed in 1.2.0-7.el9_2
- libwebp-devel Fixed in 1.2.0-7.el9_2
- libwebp-tools Fixed in 1.2.0-7.el9_2
- thunderbird Fixed in 102.15.1-1.el9_2.alma
Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
CloudLinux 8
- firefox Fixed in 102.15.1-1.el8_8.alma
- libwebp Fixed in 1.0.0-8.el8_8.1
- libwebp-devel Fixed in 1.0.0-8.el8_8.1
- thunderbird Fixed in 102.15.1-1.el8_8.alma
Derived from AlmaLinux 8. Partial coverage: only packages taken from AlmaLinux 8 are listed.
Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
CloudLinux 9
- firefox Fixed in 102.15.1-1.el9_2.alma
- firefox-x11 Fixed in 102.15.1-1.el9_2.alma
- libwebp Fixed in 1.2.0-7.el9_2
- libwebp-devel Fixed in 1.2.0-7.el9_2
- libwebp-tools Fixed in 1.2.0-7.el9_2
- thunderbird Fixed in 102.15.1-1.el9_2.alma
Derived from AlmaLinux 9. Partial coverage: only packages taken from AlmaLinux 9 are listed.
Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
Debian 12
- chromium Fixed in 117.0.5938.62-1
- firefox-esr Fixed in 102.15.1esr-1~deb12u1
- libwebp Fixed in 1.2.4-0.2+deb12u1
- thunderbird Fixed in 1:102.15.1-1~deb12u1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 13
- chromium Fixed in 117.0.5938.62-1
- firefox-esr Fixed in 115.2.1esr-1
- libwebp Fixed in 1.2.4-0.3
- thunderbird Fixed in 1:115.2.2-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 14
- chromium Fixed in 117.0.5938.62-1
- firefox-esr Fixed in 115.2.1esr-1
- libwebp Fixed in 1.2.4-0.3
- thunderbird Fixed in 1:115.2.2-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 20.04 LTS
- firefox Fixed in 117.0.1+build2-0ubuntu0.20.04.1
- libwebp Fixed in 0.6.1-2ubuntu0.20.04.3
- thunderbird Fixed in 1:102.15.1+build1-0ubuntu0.20.04.1
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 22.04 LTS
- libwebp Fixed in 1.2.2-2ubuntu0.22.04.2
- thunderbird Fixed in 1:102.15.1+build1-0ubuntu0.22.04.1
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu Pro 18.04 LTS
- libwebp Fixed in 0.6.1-2ubuntu0.18.04.2+esm1Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.