Out-of-bounds write in Apple Safari
Priority CRITICAL 97Exploited in the wildCWE-787Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Partial Red Hat: 14 fixed, 2 without a fix
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA and Red Hat. Impact type from CWE-787 and the CVSS impact.
Summary
A memory corruption vulnerability was addressed with improved locking. This issue is fixed in iOS 17.1.2 and iPadOS 17.1.2, macOS Sonoma 14.1.2, Safari 17.1.2. Processing web content may lead to arbitrary code execution. Apple is aware of a report that this issue may have been exploited against versions of iOS before iOS 16.7.1.
Why it matters now
Exploitation Active In CISA KEV since 2023-12-04CISA due date 2023-12-25
EPSS 0.09295 95th percentileScored 2026-11-07
Fix Partial Safari (Apple): 17.1macOS (Apple): 14.1+1 more productRed Hat: 11 advisoriesRed Hat: 14 fixed, 2 without a fix
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Active
- Automatable
- No
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Apple | Safari | before 17.1 | 17.1 | Patch available | CNA |
| Apple | macOS | before 14.1 | 14.1 | Patch available | CNA |
| Apple | iOS and iPadOS | before 17.1 | 17.1 | Patch available | CNA |
- Safari VendorApple Affected before 17.1 Fixed in 17.1 Patch available CNA
- macOS VendorApple Affected before 14.1 Fixed in 14.1 Patch available CNA
- iOS and iPadOS VendorApple Affected before 17.1 Fixed in 17.1 Patch available CNA
CPE configurations NVD · 9
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:apple:safari:*:*:*:*:*:*:*:* | before 17.1.2 | Vulnerable | Apple |
| cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:* | before 15.8.1; 16.0 to before 16.7.3; 17.0 to before 17.1.2 | Vulnerable | Apple |
| cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:* | before 15.8.1; 16.0 to before 16.7.3; 17.0 to before 17.1.2 | Vulnerable | Apple |
| cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:* | 14.0 to before 14.1.2 | Vulnerable | Apple |
| cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:* | 11.0 | Vulnerable | Debian |
| cpe:2.3:o:debian:debian_linux:12.0:*:*:*:*:*:*:* | 12.0 | Vulnerable | Debian |
| cpe:2.3:o:fedoraproject:fedora:38:*:*:*:*:*:*:* | 38 | Vulnerable | Fedoraproject |
| cpe:2.3:o:fedoraproject:fedora:39:*:*:*:*:*:*:* | 39 | Vulnerable | Fedoraproject |
| cpe:2.3:a:webkitgtk:webkitgtk\+:*:*:*:*:*:*:*:* | before 2.42.3 | Vulnerable | WebKitGTK |
- cpe:2.3:a:apple:safari:*:*:*:*:*:*:*:* Versions before 17.1.2 Vulnerable ·Apple
- cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:* Versions before 15.8.1; 16.0 to before 16.7.3; 17.0 to before 17.1.2 Vulnerable ·Apple
- cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:* Versions before 15.8.1; 16.0 to before 16.7.3; 17.0 to before 17.1.2 Vulnerable ·Apple
- cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:* Versions 14.0 to before 14.1.2 Vulnerable ·Apple
- cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:* Versions 11.0 Vulnerable ·Debian
- cpe:2.3:o:debian:debian_linux:12.0:*:*:*:*:*:*:* Versions 12.0 Vulnerable ·Debian
- cpe:2.3:o:fedoraproject:fedora:38:*:*:*:*:*:*:* Versions 38 Vulnerable ·Fedoraproject
- cpe:2.3:o:fedoraproject:fedora:39:*:*:*:*:*:*:* Versions 39 Vulnerable ·Fedoraproject
- cpe:2.3:a:webkitgtk:webkitgtk\+:*:*:*:*:*:*:*:* Versions before 2.42.3 Vulnerable ·WebKitGTK
Remediation
- Fix · CNA Safari (Apple) Fixed in 17.1
- Fix · CNA macOS (Apple) Fixed in 14.1
- Fix · CNA iOS and iPadOS (Apple) Fixed in 17.1
Red Hat 11 advisories
- RHSA-2025:10364 Released 2025-07-07 · Red Hat rating Importantwebkitgtk4 security update
- Red Hat Enterprise Linux Server (v. 7 ELS) webkitgtk4-2.48.3-2.el7_9, webkitgtk4-devel-2.48.3-2.el7_9, webkitgtk4-jsc-2.48.3-2.el7_9 +1
- Red Hat Enterprise Linux Server Optional (v. 7 ELS) webkitgtk4-devel-2.48.3-2.el7_9, webkitgtk4-doc-2.48.3-2.el7_9, webkitgtk4-jsc-devel-2.48.3-2.el7_9
- RHSA-2024:9679 Released 2024-11-14 · Red Hat rating Importantwebkit2gtk3 security update
- Red Hat Enterprise Linux AppStream AUS (v.8.4) webkit2gtk3-2.46.3-1.el8_4, webkit2gtk3-devel-2.46.3-1.el8_4, webkit2gtk3-jsc-2.46.3-1.el8_4 +1
- Red Hat Enterprise Linux AppStream E4S (v.8.4) webkit2gtk3-2.46.3-1.el8_4, webkit2gtk3-devel-2.46.3-1.el8_4, webkit2gtk3-jsc-2.46.3-1.el8_4 +1
- Red Hat Enterprise Linux AppStream TUS (v.8.4) webkit2gtk3-2.46.3-1.el8_4, webkit2gtk3-devel-2.46.3-1.el8_4, webkit2gtk3-jsc-2.46.3-1.el8_4 +1
- RHSA-2024:9680 Released 2024-11-14 · Red Hat rating Importantwebkit2gtk3 security update
- Red Hat Enterprise Linux AppStream AUS (v. 8.2) webkit2gtk3-2.46.3-1.el8_2, webkit2gtk3-devel-2.46.3-1.el8_2, webkit2gtk3-jsc-2.46.3-1.el8_2 +1
Show 8 more Red Hat advisories
- RHSA-2024:9653 Released 2024-11-14 · Red Hat rating Importantwebkit2gtk3 security update
- Red Hat Enterprise Linux AppStream AUS (v.8.6) webkit2gtk3-2.46.3-1.el8_6, webkit2gtk3-devel-2.46.3-1.el8_6, webkit2gtk3-jsc-2.46.3-1.el8_6 +1
- Red Hat Enterprise Linux AppStream E4S (v.8.6) webkit2gtk3-2.46.3-1.el8_6, webkit2gtk3-devel-2.46.3-1.el8_6, webkit2gtk3-jsc-2.46.3-1.el8_6 +1
- Red Hat Enterprise Linux AppStream TUS (v.8.6) webkit2gtk3-2.46.3-1.el8_6, webkit2gtk3-devel-2.46.3-1.el8_6, webkit2gtk3-jsc-2.46.3-1.el8_6 +1
- RHSA-2024:9646 Released 2024-11-14 · Red Hat rating Importantwebkit2gtk3 security update
- Red Hat Enterprise Linux AppStream EUS (v.8.8) webkit2gtk3-2.46.3-1.el8_8, webkit2gtk3-devel-2.46.3-1.el8_8, webkit2gtk3-jsc-2.46.3-1.el8_8 +1
- RHSA-2024:8496 Released 2024-10-28 · Red Hat rating Importantwebkit2gtk3 security update
- Red Hat Enterprise Linux AppStream E4S (v.9.0) webkit2gtk3-2.46.1-1.el9_0, webkit2gtk3-devel-2.46.1-1.el9_0, webkit2gtk3-jsc-2.46.1-1.el9_0 +1
- RHSA-2024:8492 Released 2024-10-28 · Red Hat rating Importantwebkit2gtk3 security update
- Red Hat Enterprise Linux AppStream EUS (v.9.2) webkit2gtk3-2.46.1-1.el9_2, webkit2gtk3-devel-2.46.1-1.el9_2, webkit2gtk3-jsc-2.46.1-1.el9_2 +1
- RHSA-2024:2982 Released 2024-05-22 · Red Hat rating Importantwebkit2gtk3 security update
- Red Hat Enterprise Linux AppStream (v. 8) webkit2gtk3-2.42.5-1.el8, webkit2gtk3-devel-2.42.5-1.el8, webkit2gtk3-jsc-2.42.5-1.el8 +1
- RHSA-2024:2126 Released 2024-04-30 · Red Hat rating Importantwebkit2gtk3 security update
- Red Hat Enterprise Linux AppStream (v. 9) webkit2gtk3-2.42.5-1.el9, webkit2gtk3-devel-2.42.5-1.el9, webkit2gtk3-jsc-2.42.5-1.el9 +1
- RHSA-2023:7716 Released 2023-12-11 · Red Hat rating Importantwebkit2gtk3 security update
- Red Hat Enterprise Linux AppStream (v. 8) webkit2gtk3-2.40.5-1.el8_9.1, webkit2gtk3-devel-2.40.5-1.el8_9.1, webkit2gtk3-jsc-2.40.5-1.el8_9.1 +1
- RHSA-2023:7715 Released 2023-12-11 · Red Hat rating Importantwebkit2gtk3 security update
- Red Hat Enterprise Linux AppStream (v. 9) webkit2gtk3-2.40.5-1.el9_3.1, webkit2gtk3-devel-2.40.5-1.el9_3.1, webkit2gtk3-jsc-2.40.5-1.el9_3.1 +1
Fixed in the same release
Records fixed by the same vendor advisory or release, as the CNA lists them.
- Release ·
Apple Safari, iOS and iPadOS, macOS 14.1, 17.1
2 records Highest priority Priority CRITICAL 2 CRITICAL
Other records, highest priority first
- TI-2023-22995 Out-of-bounds read in Apple SafariPriority CRITICAL 86
Vendor assessments
Red Hat
Red Hat rating: Important. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 6 | Affected | No fix planned: Out of support scope |
| Red Hat Enterprise Linux 7 | Affected | No fix planned: Will not fix |
| Red Hat Enterprise Linux AppStream (v. 8) | Fixed | RHSA-2023:7716, RHSA-2024:2982 |
| Red Hat Enterprise Linux AppStream (v. 9) | Fixed | RHSA-2023:7715, RHSA-2024:2126 |
| Red Hat Enterprise Linux AppStream AUS (v. 8.2) | Fixed | RHSA-2024:9680 |
| Red Hat Enterprise Linux AppStream AUS (v.8.4) | Fixed | RHSA-2024:9679 |
| Red Hat Enterprise Linux AppStream AUS (v.8.6) | Fixed | RHSA-2024:9653 |
| Red Hat Enterprise Linux AppStream E4S (v.8.4) | Fixed | RHSA-2024:9679 |
| Red Hat Enterprise Linux AppStream E4S (v.8.6) | Fixed | RHSA-2024:9653 |
| Red Hat Enterprise Linux AppStream E4S (v.9.0) | Fixed | RHSA-2024:8496 |
| Red Hat Enterprise Linux AppStream EUS (v.8.8) | Fixed | RHSA-2024:9646 |
| Red Hat Enterprise Linux AppStream EUS (v.9.2) | Fixed | RHSA-2024:8492 |
| Red Hat Enterprise Linux AppStream TUS (v.8.4) | Fixed | RHSA-2024:9679 |
| Red Hat Enterprise Linux AppStream TUS (v.8.6) | Fixed | RHSA-2024:9653 |
| Red Hat Enterprise Linux Server (v. 7 ELS) | Fixed | RHSA-2025:10364 |
| Red Hat Enterprise Linux Server Optional (v. 7 ELS) | Fixed | RHSA-2025:10364 |
Timeline
- 2023-12-04 Added to CISA KEV
- 2026-10-02 Threatist record created from CVE-2023-42917
- 2026-10-03 Alias added: GHSA-phhr-cqm7-gjv6
References
Advisory 16
- https://support.apple.com/en-us/HT214033
- https://support.apple.com/en-us/HT214032
- https://support.apple.com/en-us/HT214031
- https://support.apple.com/kb/HT214033
- http://www.openwall.com/lists/oss-security/2023/12/05/1
- https://support.apple.com/kb/HT214034
- https://www.debian.org/security/2023/dsa-5575
- http://seclists.org/fulldisclosure/2023/Dec/3
- http://seclists.org/fulldisclosure/2023/Dec/4
- http://seclists.org/fulldisclosure/2023/Dec/5
- http://seclists.org/fulldisclosure/2023/Dec/8
- http://seclists.org/fulldisclosure/2023/Dec/13
- http://seclists.org/fulldisclosure/2023/Dec/12
- https://security.gentoo.org/glsa/202401-04
- https://support.apple.com/kb/HT214062
- http://seclists.org/fulldisclosure/2024/Jan/35
More Apple Ipados vulnerabilities
- TI-2025-28008 Out-of-bounds write in Apple iOS and iPadOS KEVCVSS 3.1CRITICAL 10.0
- TI-2025-22441 Apple iOS and iPadOS: An attacker with arbitrary read and write capability may be able to… KEVCVSS 3.1CRITICAL 9.8
- TI-2025-22440 Memory corruption in Apple iOS and iPadOS KEVCVSS 3.1CRITICAL 9.8
- TI-2025-17951 Out-of-bounds write in Apple Safari KEVCVSS 3.1CRITICAL 10.0
- TI-2025-17847 Use after free in Apple iOS and iPadOS KEVCVSS 3.1CRITICAL 10.0
- TI-2022-06854 Out-of-bounds write in Apple iOS and iPadOS KEVCVSS 3.1CRITICAL 9.8
Sources
- CVE-2023-42917 · CVE Program
- CVE-2023-42917 · NVD
- CISA Known Exploited Vulnerabilities
- FIRST EPSS
- GHSA-phhr-cqm7-gjv6 · GitHub Advisory Database · CC BY 4.0
- CVE-2023-42917 · Red Hat security data · CC BY 4.0
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