CVE-2025-31277highunder attackCWE-119CWE-120

CVE-2025-31277: high-severity vulnerability in Apple Safari

Published · Updated

71Vexday Risk Score

Prioritize patching. It under exploitation confirmed by CISA and has a public proof of concept.

ssvc Actcvss 8.8epss 1.7%
from disclosure to weapon241 days
Published on NVDJul 29
1st PoC+241d
CISA KEV+234d
exploitation probability
1.7%top 23% of all CVEs
observed exploitation
yesCISA + VulnCheck
1 public exploit(s)
What the vendors declare (VEX)

Official vendor statements in CSAF/VEX format: whether their product is affected, already fixed, or ruled out — and why. These are the vendor's assertions, not Vexday's judgment.

Affected
1 product (4 components)
Red Hat Enterprise Linux 6
workaround: Do not process or load untrusted web content with WebKitGTK. In Red Hat Enterprise Linux 7, the following packages require WebKitGTK4: evolution-data-server, glade, gnome-boxes, gnome-initial-setup, gnome-online-accounts, gnome-shell, shotwell…
Fixed
15 products (436 components)
Red Hat Enterprise Linux AppStream (v. 8) · Red Hat Enterprise Linux AppStream (v. 9) · Red Hat Enterprise Linux AppStream E4S (v.8.6) · Red Hat Enterprise Linux AppStream E4S (v.9.0) · Red Hat Enterprise Linux AppStream E4S (v.9.2) · and others 10
Not affected
1 product (5 components) — because the vulnerable code is not present in the product
Red Hat Enterprise Linux 7
Action required by CISAfederal deadline: 2026-04-03

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

In short

A flaw in Safari and Apple devices allows attackers to corrupt memory by sending maliciously crafted web content. This can crash your browser or potentially enable further attacks on your device.

Technical detail

Buffer overflow or out-of-bounds memory access vulnerability (CWE-119) in Safari's web content processing engine. Remote attack vector via malicious web content; no user interaction beyond visiting a crafted webpage required. Successful exploitation leads to memory corruption, enabling code execution or denial of service.

Summary generated and translated by AI from the official description.

The full analysis of this CVE is available in Portuguese →

The issue was addressed with improved memory handling. This issue is fixed in Safari 18.6, iOS 18.6 and iPadOS 18.6, macOS Sequoia 15.6, tvOS 18.6, visionOS 2.6, watchOS 11.6. Processing maliciously crafted web content may lead to memory corruption.
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
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