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The vulnerability of the CanvasHandler component in the Mozilla Firefox browser allows a hacker to execute arbitrary code.

🗓️ 02 Jul 2025 00:00:00Reported by FSTEC of Russia — Information Security Threat DatabaseType 
bdu_fstec
 bdu_fstec🔗 bdu.fstec.ru👁 3 Views

CanvasHandler flaw in Mozilla Firefox allows attacker to write beyond buffer and execute code.

Related
Detection
Refs
ReporterTitlePublishedViews
Family
AlpineLinux		CVE-2025-49709
11 Jun 202512:15
–alpinelinux
AstraLinux		Astra Linux – Vulnerability in Firefox
19 Jun 202611:10
–astralinux
FreeBSD		Firefox -- Multiple vulnerabilities
11 Jun 202500:00
–freebsd
Chainguard		CVE-2025-49709 vulnerabilities
16 Jun 202507:15
–cgr
Circl		CVE-2025-49709
11 Jun 202515:17
–circl
CNNVD		Mozilla Firefox 缓冲区错误漏洞
11 Jun 202500:00
–cnnvd
CVE		CVE-2025-49709
11 Jun 202512:07
–cve
Cvelist		CVE-2025-49709 Memory corruption in canvas surfaces
11 Jun 202512:07
–cvelist
Debian CVE		CVE-2025-49709
11 Jun 202512:07
–debiancve
EUVD		EUVD-2025-18101
3 Oct 202520:07
–euvd
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Vulners
Node
novellsuse_openstack_cloudMatch7
OR
novellsuse_linux_enterprise_module_for_desktop_applicationsMatch15
OR
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novellsuse_openstack_cloudMatch9
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novellsuse_openstack_cloud_crowbarMatch9
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novellsuse_linux_enterprise_high_performance_computingMatch15-espos
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novellsuse_linux_enterprise_high_performance_computingMatch15-ltss
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mozillafirefoxRange<139.0.4
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novellopensuse_leapMatch15.5
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novellsuse_linux_enterprise_server_for_sap_applicationsMatch15
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SourceLink
bugzillawww.bugzilla.mozilla.org/show_bug.cgi
mozillawww.mozilla.org/security/advisories/mfsa2025-47/
ubuntuwww.ubuntu.com/security/CVE-2025-49709
susewww.suse.com/security/cve/CVE-2025-49709.html
wikiwww.wiki.astralinux.ru/astra-linux-se18-bulletin-2025-0811SE18
wikiwww.wiki.astralinux.ru/astra-linux-se17-bulletin-2025-0923SE17
xn--80ahaefyxhnwww.xn--80ahaefyxhn.xn--j1afgaq.xn--p1ai/bin/view/%D0%9E%D0%A1%D0%BD%D0%BE%D0%B2%D0%B0/%D0%9E%D0%B1%D0%BD%D0%BE%D0%B2%D0%BB%D0%B5%D0%BD%D0%B8%D1%8F/2.14/
wikiwww.wiki.astralinux.ru/astra-linux-se47-bulletin-2025-1020SE47
wikiwww.wiki.astralinux.ru/astra-linux-se16-bulletin-20251225SE16
xn--80ahaefyxhnwww.xn--80ahaefyxhn.xn--j1afgaq.xn--p1ai/bin/view/%D0%9E%D0%A1%D0%BD%D0%BE%D0%B2%D0%B0/%D0%9E%D0%B1%D0%BD%D0%BE%D0%B2%D0%BB%D0%B5%D0%BD%D0%B8%D1%8F/3.1/
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04 Mar 2026 00:00Current
8.3High risk
Vulners AI Score8.3
CVSS 39.8
CVSS 210
EPSS0.0058
CanvasHandlerMozilla FirefoxBuffer overflowRemote attackerArbitrary code execution
3