4.3

CVE-2025-43421: apple ios and ipados Out-of-bounds Read

CVSS: 4.3v3.1MediumModified
AliasesUBUNTU-CVE-2025-43421DEBIAN-CVE-2025-43421
Published 04-11-2025Last modified 02-04-2026
Open JSON

Vulnerability summary

CVE-2025-43421 is a medium (CVSS 4.3) Out-of-bounds Read vulnerability in apple ios and ipados. EPSS estimates a 0.65% chance of exploitation in the next 30 days, higher than 50% of scored vulnerabilities.

Overall risk
17/100
0100
Low · default modelHow is this calculated?
CVSS score
4.3/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.65%
0%100%
Low · +0.04 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 21 · Related 6
DLA-4399-1DSA-6074-1MGASA-2025-0319MGASA-2025-0325OPENSUSE-SU-2026:20065-1RHSA-2025:22789

Timeline

  1. 04-11-2025
    PublishedVulnerability first disclosed.
  2. 02-04-2026
    Last modifiedVulnerability information updated.

Description

Multiple issues were addressed by disabling array allocation sinking. This issue is fixed in Safari 26.1, iOS 26.1 and iPadOS 26.1, macOS Tahoe 26.1, visionOS 26.1. Processing maliciously crafted web content may lead to an unexpected process crash.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.65%

Chance of exploitation in the next 30 days

Percentile

50%

Versus all other CVEs

30-day change

+0.04 pp

From 0.60% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.65%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Apple6 products
Ubuntu5 products
  • qtwebkit-opensource-srcAll versions (No fix recorded)
  • qtwebkit-sourceAll versions (No fix recorded)
  • webkit2gtkAll versions (No fix recorded) | < 2.50.3-0ubuntu0.22.04.1 | < 2.50.3-0ubuntu0.24.04.1 | < 2.50.3-0ubuntu0.25.10.1
  • webkitgtkAll versions (No fix recorded)
  • wpewebkitAll versions (No fix recorded)
Debian2 products
  • webkit2gtk< 2.50.3-1~deb12u1 | < 2.50.3-1~deb13u1 | < 2.50.3-1
  • wpewebkitAll versions (No fix recorded) | < 2.50.3-1

3 vendors · 13 products

References

9 links