How severe is CVE-2023-27958?

CVE-2023-27958 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability high.

Is CVE-2023-27958 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (73rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-27958?

CVE-2023-27958 affects Apple Macos. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-27958?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2023-27958 published?

CVE-2023-27958 was published on 2023-05-08 and last updated on 2026-06-17.

CVE-2023-27958

CVE-2023-27958 is a critical-severity vulnerability in Apple Macos with a CVSS 3.x base score of 9.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-770.

Key facts

Severity: Critical (CVSS 3.x base score 9.1)
EPSS exploit prediction: 2% (73rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-770
Affected product: Apple Macos
Published: 2023-05-08
Last modified: 2026-06-17

Description

The issue was addressed with improved memory handling. This issue is fixed in macOS Ventura 13.3, macOS Monterey 12.6.4, macOS Big Sur 11.7.5. A remote user may be able to cause unexpected system termination or corrupt kernel memory.

Frequently asked questions

What is CVE-2023-27958?: The issue was addressed with improved memory handling. This issue is fixed in macOS Ventura 13.3, macOS Monterey 12.6.4, macOS Big Sur 11.7.5. A remote user may be able to cause unexpected system termination or corrupt kernel memory.
How severe is CVE-2023-27958?: CVE-2023-27958 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability high.
Is CVE-2023-27958 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (73rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-27958?: CVE-2023-27958 affects Apple Macos. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-27958?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2023-27958 published?: CVE-2023-27958 was published on 2023-05-08 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*

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