CVE-2026-39877
Medium
Elevated severity or exploit probability.
CVSS base
7.8
HIGH
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
EPSS — probability of exploitation (30 days)
0.2%
9.8th percentile
CISA KEV
Not listed
Weakness / dates
CWE-119
Published 2026-07-27 · modified 2026-08-25
CVSS breakdown
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
| Attack Vector | L | Local |
| Attack Complexity | L | Low |
| Privileges Required | N | None |
| User Interaction | R | Required |
| Scope | U | Unchanged |
| Confidentiality | H | High |
| Integrity | H | High |
| Availability | H | High |
Timeline
- 2026-07-27 — Published (NVD)
- 2026-08-25 — Last modified (NVD)
Description
A memory corruption issue was addressed with improved memory handling. This issue is fixed in iOS 18.7.10 and iPadOS 18.7.10, iOS 26.5 and iPadOS 26.5, macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, macOS Tahoe 26.5, tvOS 26.5, visionOS 26.5, watchOS 26.5. An app may be able to disclose kernel memory.
Affected
References
- https://support.apple.com/en-us/127110
- https://support.apple.com/en-us/127115
- https://support.apple.com/en-us/127118
- https://support.apple.com/en-us/127119
- https://support.apple.com/en-us/127120
- https://support.apple.com/en-us/128071
- https://support.apple.com/en-us/128072
- https://support.apple.com/en-us/148287