Critical severity · published Apr 3, 2017
CVE-2017-5949
JavaScriptCore in WebKit, as distributed in Safari Technology Preview Release 22, allows remote attackers to cause a denial of service (heap-based out-of-bounds write and…
9.8
CVSS
1.8%
EPSS
No
On KEV
Description
JavaScriptCore in WebKit, as distributed in Safari Technology Preview Release 22, allows remote attackers to cause a denial of service (heap-based out-of-bounds write and application crash) or possibly have unspecified other impact via crafted JavaScript code that triggers access to red-zone memory locations, related to jit/ThunkGenerators.cpp, llint/LowLevelInterpreter32_64.asm, and llint/LowLevelInterpreter64.asm.
CVSS vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.8% · higher than 79% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
SA
Safari · Apple
22 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2017-5949
CVE.org
https://www.cve.org/CVERecord?id=CVE-2017-5949
Third Party Advisory
http://www.securityfocus.com/bid/97298
Issue Tracking
https://bugs.webkit.org/show_bug.cgi?id=167239
Issue Tracking
https://trac.webkit.org/changeset/211479
More from Safari
10.0
CVE-2025-24201
Apple Multiple Products WebKit Out-of-Bounds Write Vulnerability
8.8
CVE-2025-43529
Apple Multiple Products Use-After-Free WebKit Vulnerability
8.8
CVE-2025-14174
Google Chromium Out of Bounds Memory Access Vulnerability
8.8
CVE-2023-43000
Apple Multiple products Use-After-Free Vulnerability
8.8
CVE-2025-31277
Apple Multiple Products Buffer Overflow Vulnerability